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@comment{{Command line: /usr/bin/bib2bib strings.bib SpritesSearch.bib}}
@article{2005georl..3222804d,
  author = {{Dwyer}, J.~R. and {Smith}, D.~M.},
  title = {{A comparison between Monte Carlo simulations of runaway
		  breakdown and terrestrial gamma-ray flash observations}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = nov,
  volume = 32,
  pages = {22804-+},
  doi = {10.1029/2005GL023848},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3222804D&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{2005georl..3222807t,
  author = {{Thomas}, J.~N. and {Holzworth}, R.~H. and {McCarthy},
		  M.~P. and {Pinto}, O.},
  title = {{Lightning sferics and stroke-delayed pulses measured in
		  the stratosphere: Implications for mesospheric currents}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = nov,
  volume = 32,
  pages = {22807-+},
  doi = {10.1029/2005GL024629},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3222807T&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{allen2000,
  author = {Allen, D. and Pickering, K. and Stenchikov, G. and Thompson, A. and Kondo, Y.},
  title = {A three-dimensional total odd nitrogen (NO$_y$) simulation during SONEX},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D3},
  year = {2000},
  pages = {3851--76},
  abstract = {
	The relative importance of various odd nitrogen (NO$_y$) sources
	}
}
@article{allen2002,
  author = {Allen, D. J. and Pickering, K. E.},
  title = {Evaluation of lightning flash rate parameterizations for use in a global},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {D23},
  year = {2002},
  pages = {ACH15--1-21},
  abstract = {
	Model simulations of tropospheric O$_3$ require an accurate specification
	}
}
@article{anisimov1999,
  author = {Anisimov, S. V. and Mareev, E. A. and Bakastov, S. S.},
  title = {On the generation and evolution of aeroelectric structures
		  in the surface},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {D12},
  year = {1999},
  pages = {14359--67},
  abstract = {
		  
		  }
}
@article{armstrong2000,
  author = {Armstrong, R. A. and Suszcynsky, D. M. and Lyons, W. A.
		  and Nelson, T. E.},
  title = {Multi-color photometric measurements of ionization and
		  energies in sprites},
  journal = {Geophysical Research Letters},
  volume = {27},
  number = {5},
  year = {2000},
  pages = {653--6},
  abstract = { Recent time-resolved multi-color photometric data
		  obtained on one class of lightning-related transient
		  upper-atmospheric electromagnetic events called sprites
		  have confirmed an impulsive ionization emission during the
		  sprite initiation. Data have also been obtained on some
		  sprites which do not exhibit observable tendrils and which
		  exhibit ionization emission that, if present, is below the
		  authors' detection limit. This suggests that some sprite
		  events exhibit strong ionization while others do not. These
		  results indicate that conditions causing sprite optical
		  emissions are highly variable. }
}
@article{arrayas2002,
  author = {Arrayas, M. and Ebert, U. and Hundsdorfer, W.},
  title = {Spontaneous branching of anode-directed streamers between planar electrodes},
  journal = {Physical Review Letters},
  volume = {88},
  number = {17},
  year = {2002},
  pages = {174502--1-4}
}
@article{arrayas2004pre,
  author = {Arrayas, M. and Ebert, U.},
  title = {Stability of negative ionization fronts: regularization by electric},
  journal = {Physical Review E},
  volume = {69},
  number = {},
  year = {2004},
  pages = {}
}
@article{babich1,
  author = {Babich, L. P. and Kutsyk, I. M. and Kudryavtsev, A. Yu.
		  and Mozgovoi, A. L.},
  title = {The effect of the geomagnetic field on the development of
		  the upward atmospheric discharge},
  journal = {XXIII International Conference on Phenomena in Ionized
		  Gases, ICPIG Proceedings. Contributed Papers},
  volume = {1},
  year = {1},
  abstract = { Roussel-Dupre and Gurevich have developed a theory of
		  gigantic atmospheric discharges directed upward from
		  thundercloud tops into the Earth's stratosphere (1996).
		  Formation of relativistic runaway electron avalanche
		  initiated by cosmic-ray showers within the space domain of
		  a thunderstorm electric field, is the heart of the theory.
		  The theory allowed one to treat the origin of wide columns
		  of light radiance observed repeatedly above thunderclouds.
		  These light phenomena are known as }
}
@article{barringtonleigh1999,
  author = {Barrington Leigh, C. P. and Inan, U. S. and Stanley, M. and
		  Cummer, S. A.},
  title = {Sprites triggered by negative lightning discharges},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {24},
  year = {1999},
  pages = {3605--8},
  abstract = { High altitude air breakdown, manifested as }
}
@article{barringtonleigh2001,
  author = {Barrington Leigh, C. P. and Inan, U. S. and Stanley, M.},
  title = {Identification of sprites and elves with intensified video
		  and broadband},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {A2},
  year = {2001},
  pages = {1741--50},
  abstract = { Confusion in the interpretation of s andard-speed video
		  observations of }
}
@article{barringtonleigh2002,
  author = {Barrington Leigh, C. P. and Pasko, V. P. and Inan, U. S.},
  title = {Exponential relaxation of optical emissions in sprites},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {A5},
  year = {2002},
  pages = {SIA6--1-6-11},
  abstract = { The optical emissions in a large number of bright sprites
		  observed over one }
}
@article{bedard1999asaj,
  author = {{Bedard}, A.~J.},
  title = {{Naturally occurring sources of infrasound }},
  journal = {Acoustical Society of America Journal},
  year = 1999,
  month = {February},
  volume = 105,
  pages = {1103-+},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1999ASAJ..105R1103B&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{bell1995rs,
  author = {Bell, T. F. and Inan, U. S. and Reising, S. C. and Rodriguez, J.
		  V.},
  title = {VLF signatures of ionospheric heating by HIPAS},
  journal = {Radio Sci.},
  volume = {30},
  year = {1995},
  abstract = { Summary form only given, as follows. The amplitude and
		  phase of }
}
@article{bell1998,
  author = {Bell, T. F. and Reising, S. C. and Inan, U. S.},
  title = {Intense continuing currents following positive
		  cloud-to-ground lightning},
  journal = {Geophysical Research Letters},
  volume = {25},
  number = {8},
  year = {1998},
  pages = {1285--8},
  abstract = { In July-August, 1996, Stanford University carried out
		  broad and ELF/VLF }
}
@article{belyaev2006asr,
  author = {A.N. Belyaev and V.V. Alpatov and E. Blanc and V.E. Melnikov},
  title = {Space-based observations of {O2 A (0,0)} band emission near the solar terminator and their interpretation},
  journal = {Adv.\ Space Res.},
  year = 2006,
  note = {In press}
}
@article{bering2002grl,
  author = {Bering, E. A. , III and Benbrook, J. R. and Garrett, J. A. and
		  Paredes, A. M. and E.M. Wescott and 
D.R. Moudry and D.D. Sentman and H.C. Stenbaeck-Nielsen and W.A. Lyons},
  title = {The electrodynamics of sprites},
  journal = {Geophys.\ Res.\ Lett.},
  volume = {29},
  number = {5},
  year = {2002},
  pages = {8--1-4},
  abstract = { A balloon campaign was conducted in boreal summer 1999 to
		  measure the }
}
@article{berntsen1999tellus,
  author = {Berntsen, T. K. and Isaksen, I. S. A.},
  title = {Effects of lightning and convection on changes in tropospheric ozone due to},
  journal = {Tellus, Series B Chemical and Physical Meteorology},
  volume = {51B},
  number = {4},
  year = {1999},
  pages = {766},
  abstract = {
	A global 3-dimensional chemical tracer model (CTM) has been used to
	}
}
@article{biazar1995,
  author = {Biazar, A. P. and McNider, R. T.},
  title = {Regional estimates of lightning production of nitrogen oxides},
  journal = {Journal of Geophysical Research},
  volume = {100},
  number = {D11},
  year = {1995},
  pages = {22861--74},
  abstract = {
	Summertime distribution of lightning over the United States and the
	}
}
@article{blanc2004jgr,
  author = {{Blanc}, E. and {Farges}, T. and {Roche}, R. and {Brebion}, D. and 
	{Hua}, T. and {Labarthe}, A. and {Melnikov}, V.},
  title = {{Nadir observations of sprites from the International Space Station}},
  journal = {J.\ Geophys.\ Res.},
  year = 2004,
  month = {February},
  volume = 109,
  number = {A18},
  pages = {2306-+},
  doi = {10.1029/2003JA009972},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004JGRA..10902306B&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{boeck1998,
  author = {Boeck, W. L. and Vaughan, O. H. , Jr. and Blakeslee, R. J.
		  and Vonnegut, B. and Brook, M.},
  title = {The role of the space shuttle videotapes in the discovery
		  of sprites, jets and elves},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {7--9},
  year = {1998},
  pages = {669--77},
  abstract = { The sequence of videotape observations of the upper
		  atmospheric optical flashes called sprites, jets, starters,
		  and ELVES are described in the successive phases of search,
		  discovery, confirmation, and exploration for the years
		  before 1993. Although there were credible eyewitness
		  accounts from ground observers and pilots, these reports
		  did not inspire a systematic search for hard evidence of
		  such phenomena. The science community would instead wait
		  for serendipitous observations to move the leading edge of
		  this science forward. The phenomenon, now known as a
		  sprite, was first accidentally documented on ground based
		  videotape recordings on the night of 6 July, 1989. Video
		  observations from the space shuttle acquired from 1989-1991
		  provided 17 additional examples to confirm the existence of
		  the sprite phenomenon. Successful video observations from a
		  mountain ridge by Lyons, starting on 7 July, 1993, and
		  night-time aircraft video observations by Sentman and
		  Wescott on 8 July, 1993 established the basic science of
		  the sprite phenomena by acquiring and analyzing data based
		  on hundreds of new events. The 1994 Sprites campaign and
		  the video entitled }
}
@article{bond2001,
  author = {Bond, D. W. and Zhang, R. and Xuexi Tie and Brasseur, G. and Huffines, G. and Orville, R.},
  title = {NO$_x$ production by lightning over the continental United States},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {D21},
  year = {2001},
  pages = {27701--10},
  abstract = {
	The production of NO/sub x/ by lightning over the contiguous United States
	}
}
@article{bradshaw2000,
  author = {Bradshaw, J. and Davis, D. and Grodzinsky, G. and Smyth, S. and Newell, R. and Sandholm, S.T. and Singh, H. B. and Blake, D. R. and Blake, N. J. and Atlas, E. and Flocke,-F.},
  title = {Observed distributions of nitrogen oxides in the remote free troposphere},
  journal = {Reviews of Geophysics},
  volume = {38},
  number = {1},
  year = {2000},
  pages = {61--116},
  abstract = {
	Discusses NO/sub x/ together with associated chemically coupled species in
	}
}
@article{brundell2002,
  author = {Brundell, J. B. and Rodger, C. J. and Dowden, R. L.},
  title = {Validation of single-station lightning location technique},
  journal = {Radio Science},
  volume = {37},
  number = {4},
  year = {2002},
  pages = {12--1-9},
  abstract = {
		  
		  }
}
@article{brunner1998,
  author = {Brunner, D. and Staehelin, J. and Jeker, D.},
  title = {Large-scale nitrogen oxide plumes in the tropopause region and implications},
  journal = {Science },
  volume = {282},
  number = {5392},
  year = {1998},
  pages = {1305--9},
  abstract = {
	Continuous measurements of nitrogen oxide and ozone were performed from a
	}
}
@article{bucsela2003,
  author = {Bucsela, E and Morrill, J and Heavner, M and Siefring, C
		  and Berg, S and Hampton, D and Moudry, D and Wescott, E and
		  Sentman, D},
  title = { N-2(B-3 Pi(g)) and N-2(+)(A(2) Pi(u)) vibrational
		  distributions observed 2 in sprites },
  journal = {JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {583--590},
  abstract = { A pair of spectra taken simultaneously by two different
		  ground-based instruments has been analyzed by our group. As
		  with previous observations, the spectra are composed
		  primarily of the N-2 first positive group (1PG) (B(3)Pi(g)
		  - A(3)Sigma(u)(+)). In a previous study, we compared the
		  N-2(B) vibrational distributions from the spectral analysis
		  with those resulting from a time-dependent kinetic model of
		  N-2 triplet excited state populations. Both spectra reflect
		  emission between 50 and 60 km. The higher-attitude spectrum
		  is primarily 1PG but also shows the presence of features
		  which appear to be N-2(+) Meinel (A(2) Pi(u) -
		  X(2)Sigma(g)(+)). The lower-attitude spectrum shows little
		  or none of the apparent Meinel emission but has an N-2(B)
		  vibrational distribution similar to ones observed in
		  laboratory afterglows. In this paper we discuss the
		  apparent presence of the Meinel emission and present the
		  observed N-2(B) vibrational distributions. (C) 2003
		  Elsevier Science Ltd. All ! }
}
@article{budtzjorgensen2001,
  author = {Budtz Jorgensen, C. and Kuvvetli, I. and Westergaard, N.
		  J. and Jonasson, P. and Reglero, V. and Eyles, C.},
  title = {The X-ray imager on AXO},
  journal = {Nuclear Instruments \& Methods in Physics Research,
		  Section A Accelerators, Spectrometers, Detectors and
		  Associated Equipment},
  volume = {458},
  number = {1--2},
  year = {2001},
  pages = {132--9},
  abstract = { DSRI has initiated a development program of CZT X-ray and
		  gamma-ray detectors employing strip readout techniques. A
		  dramatic improvement of the energy response was found
		  operating the detectors as the so-called drift detectors.
		  For the electronic readout, modern ASIC chips were
		  investigated. Modular design and the low-power electronics
		  will make large area detectors using the drift strip method
		  feasible. The performance of a prototype CZT system will be
		  presented and discussed. One such detector system has been
		  proposed for future space missions: the X-Ray Imager (XRI)
		  on the Atmospheric X-ray Observatory (AXO), which is a
		  mission proposed to the Danish Small Satellite Program and
		  is dedicated to observations of X-ray generating processes
		  in the Earth's atmosphere, Of special interest will be
		  simultaneous optical and X-ray observations of sprites that
		  are flashes appearing directly above an active thunderstorm
		  system. Additional objective is a detailed mapping of the
		  auroral X-ray and optical emission, XRI comprises a coded
		  mask and a 20*40 cm/sup 2/ CZT detector array covering an
		  energy range from 5 to 200 keV. }
}
@article{chang1995grl,
  author = {{Chang}, B. and {Price}, C.},
  title = {{Can gamma radiation be produced in the electrical environment above thunderstorms?}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 1995,
  month = may,
  volume = 22,
  pages = {1117-1120},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1995GeoRL..22.1117C&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{cheng2005grl,
  author = {Zhenggang Cheng and Steven A. Cummer},
  title = {Broadband {VLF} measurements of lightning-induced ionospheric perturbations},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  pages = {L08804},
  note = {doi:10.1029/2004GL022187}
}
@article{cho1998,
  author = {Mengu Cho and Rycroft, M. J.},
  title = {Computer simulation of the electric field structure and
		  optical emission from cloud-top to the ionosphere},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {7--9},
  year = {1998},
  pages = {871--88},
  abstract = { Computer simulations are carried out to study the
		  `sprite' onset mechanism. Both electrostatic and
		  electromagnetic codes are developed to calculate the
		  electric field structure and optical emission intensity
		  between the top of the thundercloud and the ionosphere. The
		  optical emission is composed of two structures. One peaks
		  at 70 km height and its lateral dimension is 50-60 km and
		  the other peaks at 90 km height and the lateral dimension
		  extends beyond 200 km. It is found that the nitrogen first
		  positive band, which has a red colour, dominates over the
		  nitrogen second positive band except at the bottom of the
		  optical emission. The upper part of the optical emission is
		  caused by a horizontally travelling electromagnetic pulse
		  induced by a lightning discharge current. The lower
		  structure is caused by electrostatic effects induced by the
		  unneutralized charge left after the lightning discharge
		  current flows. The electromagnetic codes developed can
		  simulate the self-consistent response of the upper
		  atmosphere to the lightning discharge current. The
		  electrostatic treatment can predict only the optical
		  emission at heights less than ~80 km. The optical emission
		  intensity has a strong nonlinear dependence on the electric
		  field strength through the enhanced electron density, and
		  is increased for a long discharge path, a large current,
		  and a short pulse. Also, the higher the lightning discharge
		  is initiated, the brighter the optical emission is, because
		  the electrostatic field is stronger for high altitude
		  lightning. }
}
@article{cho2001,
  author = {Cho, M and Rycroft, MJ},
  title = { Non-uniform ionisation of the upper atmosphere due to the
		  electromagnetic pulse from a horizontal lightning discharge
		  },
  journal = {JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS},
  volume = {63},
  number = {6},
  year = {2001},
  pages = {559--580},
  abstract = { The purpose of this paper is to model numerically the
		  ionisation created in the mesosphere above a strong
		  horizontal (cloud-to-cloud) lightning discharge, and thus
		  to understand better the formation of elves and related
		  columniform (spatially structured) sprites. Such ionisation
		  depends upon height, via the ratio of the VLF/LF wave
		  electric field (radiated by the current in the discharge)
		  to the atmospheric neutral density. The simulation shows
		  local maxima on the order of 10 km apart due to the
		  interference between direct waves radiated by the discharge
		  current, waves reflected by the ground and waves reflected
		  by the ionosphere. Parametric studies are carried out
		  varying the frequency, amplitude, height, length and
		  duration of the current. For waves greater than or equal to
		  30 kHz generated by a current greater than or equal to 50
		  kA, localised peaks of electron density occur from 75 to 85
		  km altitude, particularly for discharges longer than 15 km.
		  From such peaks, time! }
}
@article{cook2000,
  author = {Cook, D. R. and Liaw, Y. P. and Sisterson, D. L. and Miller, N. L.},
  title = {Production of nitrogen oxides by a large spark generator},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D6},
  year = {2000},
  pages = {7103--10},
  abstract = {
	A large spark generator was used outdoors to determine the production of
	}
}
@article{crawford2000,
  author = {Crawford, J. and Davis, D. and Olson, J. and Chen, G. and Liu, S. and Fuelberg, H. and Hannan, J. and Kondo, Y. and Anderson, B. and Gregory, G. and Sachse, G. and Talbot,-R. and Viggiano,
   A. and Heikes, B. and Snow, J. and Singh, H. and Blake, D.},
  title = {Evolution and chemical consequences of lightning-produced NO/sub x/ observed},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D15},
  year = {2000},
  pages = {19795--809},
  abstract = {
	Airborne observations of NO during the Subsonics Assessment Ozone and
	}
}
@article{cummer1997,
  author = {Cummer, S. A. and Inan, U. S.},
  title = {Measurement of charge transfer in sprite-producing
		  lightning using ELF radio},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {14},
  year = {1997},
  pages = {1731--4},
  abstract = { Transient high altitude optical emissions referred to as}
}
@article{cummer1998,
  author = {Cummer, S. A. and Inan, U. S. and Bell, T. F. and Barrington
		  Leigh, C. P.},
  title = {ELF radiation produced by electrical currents in sprites},
  journal = {Geophysical Research Letters},
  volume = {25},
  number = {8},
  year = {1998},
  pages = {1281--4},
  abstract = { Measurements of ELF-radiating currents associated with
		  sprite-producing }
}
@article{cummer1999,
  author = {Cummer, S. A. and Stanley, M.},
  title = {Submillisecond resolution lightning currents and sprite
		  development:},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {20},
  year = {1999},
  pages = {3205--8},
  abstract = { We analyze synchronized high speed video images and
		  ELF-VLF radio emissions }
}
@article{cummer2000,
  author = {Cummer, S. A. and Inan, U. S.},
  title = {Modeling ELF radio atmospheric propagation and extracting
		  lightning currents},
  journal = {Radio Science},
  volume = {35},
  number = {2},
  year = {2000},
  pages = {385--94},
  abstract = { Observations of extremely low frequency (ELF) radio
		  atmospherics (sferics), }
}
@article{cummer2003,
  author = {Cummer, S. A.},
  title = {Current moment in sprite-producing lightning},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {499},
  abstract = { Studies of sprite-producing lightning have revealed much
		  of what we }
}
@article{decaria2000,
  author = {DeCaria, A. J. and Pickering, K. E. and Stenchikov, G. L. and Scala, J. R. and Stith, J.},
  title = {A cloud-scale model study of lightning-generated NO/sub x/ in an individual},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D9},
  year = {2000},
  pages = {11601--16},
  abstract = {
	Understanding lightning NO/sub x/ (NO+NO/sub 2/) production on the cloud
	}
}
@article{delamere1996,
  author = {Delamere, P. A. and Stenbaek Nielsen, H. C. and Hampton, D.
		  L. and Wescott, E. M.},
  title = {Optical observations of the early (t<5 s) ion dynamics of
		  the CRRES G1, G9 },
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {A8},
  year = {1996},
  pages = {17243--57},
  abstract = { Video images of the CRRES G1, G9, and G11A barium
		  releases made at 400-500 }
}
@article{dowden1996,
  author = {Dowden, R. and Brundell, J. and Rodger, C. and Mochanov, O. and
		  Lyons, W. and Nelson, T.},
  title = {The structure of red sprites determined by VLF scattering},
  journal = {IEEE Antennas and Propagation Magazine},
  volume = {38},
  number = {3},
  year = {1996},
  pages = {7--15},
  abstract = {
		  
		  }
}
@article{dowden1996grl,
  author = {{Dowden}, R.~L. and {Brundell}, J.~B. and {Lyons}, W.~A. and 
	{Nelson}, T.},
  title = {Detection and location of red sprites by {VLF} scattering of subionospheric transmissions},
  journal = {Geophys.\ Res.\ Lett.},
  year = 1996,
  volume = 23,
  pages = {1737--1740},
  doi = {10.1029/96GL01697},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1996GeoRL..23.1737D&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{dowden1996jgr,
  author = {{Dowden}, R.~L. and {Brundell}, J.~B. and {Lyons}, W.~A.},
  title = {Are {VLF} rapid onset, rapid decay perturbations produced by scattering off sprite plasma?},
  journal = {J.\ Geophys.\ Res.},
  year = 1996,
  volume = 101,
  number = {.10},
  pages = {19175--19184},
  doi = {10.1029/96JD01346},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1996JGR...10119175D&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{dowden1997,
  author = {Dowden, R. L. and Brundell, J. B. and Rodger, C. J.},
  title = {Temporal evolution of very strong Trimpis observed at
		  Darwin, Australia},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {19},
  year = {1997},
  pages = {2419--22},
  abstract = {
		  
		  }
}
@article{dowden1997b,
  author = {Dowden, R. L. and Rodger, C. J.},
  title = {Decay of a vertical plasma column: a model to explain VLF
		  sprites},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {22},
  year = {1997},
  pages = {2765--8},
  abstract = {
		  
		  }
}
@article{dowden1997c,
  author = {Dowden, R. L. and Rodger, C. J.},
  title = {A vertical-plasma-slab model for determining the lower
		  limit to plasma},
  journal = {IEEE Antennas and Propagation Magazine},
  volume = {39},
  number = {2},
  year = {1997},
  pages = {44--53},
  abstract = {
		  
		  }
}
@article{dowden1998,
  author = {Dowden, R. L. and Hardman, S. F. and Rodger, C. J. and Brundell,
		  J. B.},
  title = {Logarithmic decay and Doppler shift of plasma associated
		  with sprites},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {1998},
  year = {1998}
}
@article{dowden2001,
  author = {Dowden, R. L. and Rodger, C. J. and Nunn, D.},
  title = {Minimum sprite plasma density as determined by VLF
		  scattering},
  journal = {IEEE Antennas and Propagation Magazine},
  volume = {43},
  number = {2},
  year = {2001},
  pages = {12--24}
}
@article{dowden2001b,
  author = {Dowden, R. and Rodger, C. and Brundell, J. and Clilverd, M.},
  title = {Decay of whistler-induced electron precipitation and
		  cloud-ionosphere},
  journal = {Radio Science},
  volume = {36},
  number = {1},
  year = {2001},
  pages = {151--69},
  abstract = {
		  
		  }
}
@article{dowden2002,
  author = {Dowden, R. L. and Brundell, J. B. and Rodger, C. J.},
  title = {VLF lightning location by time of group arrival (TOGA) at
		  multiple sites},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {64},
  number = {7},
  year = {2002},
  pages = {817--30},
  abstract = {
		  
		  }
}
@article{dwyer2004bgrl,
  author = {J.R. Dwyer and H.K. Rassoul and M. Al-Dayeh and L. Caraway and B. Wright and A. Chrest and M.A. Uman and V.A. Rakov and K.J. Rambo and D.M. Jordan and J. Jerauld and C. Smyth},
  title = {A ground level gamma ray burst observed in association with rocket-triggered lightning},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2004,
  volume = 31,
  note = {doi:10.1029/2003GL018771}
}
@article{dwyer2005grl,
  author = {{Dwyer}, J.~R. and {Rassoul}, H.~K. and {Al-Dayeh}, M. and {Caraway}, L. and 
	{Chrest}, A. and {Wright}, B. and {Kozak}, E. and {Jerauld}, J. and 
	{Uman}, M.~A. and {Rakov}, V.~A. and {Jordan}, D.~M. and {Rambo}, K.~J.
	},
  title = {{X-ray bursts associated with leader steps in cloud-to-ground lightning}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = {January},
  volume = 32,
  pages = {1803-+},
  doi = {10.1029/2004GL021782},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3201803D&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{dwyer2005grlb,
  author = {{Dwyer}, J.~R.},
  title = {The initiation of lightning by runaway air breakdown},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = oct,
  volume = 32,
  pages = {20808-+},
  doi = {10.1029/2005GL023975},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3220808D&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{ebert1996,
  author = {Ebert, U. and Van Saarloos, W. and Caroli, C.},
  title = {Streamer propagation as a pattern formation problem: planar fronts},
  journal = {Physical Review Letters},
  volume = {77},
  number = {20},
  year = {1996},
  pages = {4178--81},
  abstract = {
	Streamers often constitute the first stage of dielectric breakdown in strong
	}
}
@article{ebert1997pre,
  author = {Ebert, U. and Van Saarloos, W. and Caroli, C.},
  title = {Propagation and structure of planar streamer fronts},
  journal = {Phys. Rev. E},
  volume = {55},
  number = {},
  year = {1997},
  pages = {},
  abstract = {
	Streamers are a mode of dielectric breakdown of a gas in a strong electric
	}
}
@article{ehhalt1992,
  author = {Ehhalt, D. H. and Rohrer, F. and Wahner, A.},
  title = {Sources and distribution of NO/sub x/ in the upper troposphere at northern},
  journal = {Journal of Geophysical Research},
  volume = {97},
  number = {D4},
  year = {1992},
  pages = {3725--38},
  abstract = {
	A simple quasi-two-dimensional model is used to study the zonal distribution
	}
}
@article{ely2005grl,
  author = {{Ely}, B.~L. and {Orville}, R.~E.},
  title = {High percentage of positive lightning along the {USA} west coast},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = may,
  volume = 32,
  pages = {9815-+},
  doi = {10.1029/2005GL022782},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3209815E&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{farges2003jastp,
  author = {{Farges}, T. and {Le Pichon}, A. and {Blanc}, E. and {Perez}, S. and 
	{Alcoverro}, B.},
  title = {{Response of the lower atmosphere and the ionosphere to the eclipse of August 11, 1999}},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  year = 2003,
  month = apr,
  volume = 65,
  pages = {717-726},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2003JATP...65..717F&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{flatoy1997,
  author = {Flatoy, F. and Hov, O.},
  title = {NO/sub x/ from lightning and the calculated chemical composition of the free},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {D17},
  year = {1997},
  pages = {21373--81},
  abstract = {
	In the free troposphere, injection from the stratosphere, emissions at the
	}
}
@article{franzblau1989,
  author = {Franzblau, E. and Popp, C. J.},
  title = {Nitrogen oxides produced from lightning},
  journal = {Journal of Geophysical Research},
  volume = {94},
  number = {D8},
  year = {1989},
  pages = {11089--104},
  abstract = {
	Independent measurements of nitrogen oxides (NO/sub x/=NO+NO/sub 2/) were
	}
}
@article{fukunishi1997grl,
  author = {{Fukunishi}, H. and {Takahashi}, Y. and {Sato}, M. and {Shono}, A. and 
	{Fujito}, M. and {Watanabe}, Y.},
  title = {{Ground-based observations of ULF transients excited by strong lightning discharges producing elves and sprites}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 1997,
  month = dec,
  volume = 24,
  pages = {2973-2976},
  doi = {10.1029/97GL03022},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1997GeoRL..24.2973F&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{fullekrug1996,
  author = {Fullekrug, M. and Reising, S. C. and Lyons, W. A.},
  title = {On the accuracy of arrival azimuth determination of
		  sprite-associated},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {25},
  year = {1996},
  pages = {3691--4},
  abstract = { Horizontal magnetic field variations in the frequency
		  range of the Earth }
}
@article{fullekrug1998,
  author = {Fullekrug, M. and Fraser Smith, A. C. and Reising, S. C.},
  title = {Ultra-slow tails of sprite-associated lightning flashes},
  journal = {Geophysical Research Letters},
  volume = {25},
  number = {18},
  year = {1998},
  pages = {3497--500},
  abstract = { The authors describe the terrestrial excitation of
		  horizontal magnetic field }
}
@article{fullekrug2001,
  author = {Fullekrug, M. and Moudry, D. R. and Dawes, G. and Sentman,
		  D. D.},
  title = {Mesospheric sprite current triangulation},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {D17},
  year = {2001},
  pages = {20189--94},
  abstract = { A network of three time-synchronized high-precision
		  induction coil magnetometers is installed in North America
		  to measure sprite-associated lightning flash waveforms in
		  the frequency range 0.1-1000 Hz during the Energetics of
		  Upper Atmosphere Excitation by Lightning 1998 sprite
		  campaign in July 1998. Simultaneous intensified video
		  observations on board an aircraft are used to investigate
		  16 sprites with long time delays >33.33 ms relative to the
		  parent lightning discharge reported by the National
		  Lightning Detection Network. Three different long-delayed
		  sprite-associated waveforms can be distinguished: 38\% do
		  not exhibit any significant magnetic intensity variation,
		  25\% exhibit slow variations ~100 ms, and 25\% exhibit short
		  pulses ~4 ms. The source locations of the sprite-associated
		  short pulses are triangulated by use of arrival time
		  difference analysis. One source location exhibits a
		  substantial spatial displacement ~60 km relative to the
		  parent lightning discharge, in agreement with the azimuths
		  of sprite luminosity edges determined from the
		  corresponding background star field of the video
		  observations on board the aircraft. It is concluded from
		  the temporal and spatial coincidence of the secondary short
		  pulse and the sprite luminosity that this particular sprite
		  is associated with current in the mesosphere. }
}
@article{fullekrug2005grl,
  author = {{F{\"u}llekrug}, M.},
  title = {Detection of thirteen resonances of radio waves from particularly intense lightning discharges},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = jul,
  volume = 32,
  pages = {13809-+},
  doi = {10.1029/2005GL023028},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3213809F&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{gerken2000,
  author = {Gerken, E. A. and Inan, U. S. and Barrington Leigh, C. P.},
  title = {Telescopic imaging of sprites},
  journal = {Geophysical Research Letters},
  volume = {27},
  number = {17},
  year = {2000},
  pages = {2637--40},
  abstract = { Telescopic images of sprites show a wide variety of
		  generally vertical but also slanted fine structure,
		  including branching tree-like shapes and well defined but
		  isolated columns, with transverse spatial scales ranging
		  from tens of meters to a few hundred meters at ~60-85 km
		  altitude. Simultaneous analysis of radio atmospheric and
		  lightning data indicates that specific columnar regions are
		  selectively excited by successive discharges. }
}
@article{gerken2002,
  author = {Gerken, E. A. and Inan, U. S.},
  title = {A survey of streamer and diffuse glow dynamics observed in
		  sprites using},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {A11},
  year = {2002},
  pages = {SIA4--1-12},
  abstract = { While the fine structure in sprites can assume a wide
		  variety of shapes, }
}
@article{gerken2003,
  author = {Gerken, E. A. and Inan, U. S.},
  title = {Observations of decameter-scale morphologies in sprites},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {567},
  abstract = { Using telescopic imaging it is observed that sprite
		  morphologies such as }
}
@article{gomes1998,
  author = {Gomes, C. and Cooray, V.},
  title = {Long impulse currents associated with positive return
		  strokes},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {7--9},
  year = {1998},
  pages = {693--9},
  abstract = { Long distant electric fields (400-500 km), generated by
		  26 positive cloud-to-ground flashes, were analysed. These
		  flashes consist of well detectable long impulse fields
		  subsequent to the initial peak. These hook-shaped slow
		  fields are of considerable amplitude and have a mean
		  duration of 1.24 ms. The amplitude of the long impulse
		  field and the initial peak of the field show an
		  approximately linear relationship. The long impulse current
		  pertinent to positive return strokes which give rise to the
		  measured long impulse fields were estimated. Flashes with
		  these slow fields lower a mean charge of 50 C within the
		  first 3 ms (excluding the first 100 mu s which contains the
		  initial peak), whereas the maximum charge lowered is 124 C.
		  The mean of the ratio between the peak of the long impulse
		  field and the initial peak is 41\%. The authors also
		  estimated the fields that will be generated by the long
		  impulse currents at distances of 1000 km, 3000 km and 5000
		  km from the strike. The estimated peak magnetic fields at
		  5000 km have a mean of 52 pT. The peak magnetic fields
		  observed at distances of about 5000 km from positive
		  lightning flashes, which were associated with red sprites,
		  are in the same range as the peak magnetic fields that the
		  authors have calculated for the above 26 flashes. Hence the
		  authors conclude that the observed Q-bursts which coincide
		  with the occurrence of red sprites are due to the long
		  impulse currents of positive return strokes. This slow
		  field variation is rarely observed in connection with
		  negative return strokes. Even when it is present, in the
		  event of a negative return stroke, the amplitude and the
		  duration of the tail are much less than those of its
		  counterpart in positive return strokes. This explains why
		  ionospheric lightning is predominantly associated with
		  positive return strokes but not with negative return
		  strokes. }
}
@article{greenberg2004jgr,
  author = {{Greenberg}, E. and {Price}, C.},
  title = {{A global lightning location algorithm based on the electromagnetic signature in the Schumann resonance band}},
  journal = {J.\ Geophys.\ Res.},
  year = 2004,
  month = nov,
  volume = 109,
  number = {D18},
  pages = {21111-+},
  doi = {10.1029/2004JD004845},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004JGRD..10921111G&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{gurevich1985,
  author = {Gurevich, A. V. and Dimant, Ya. S. and Milikh, G. M. and
		  Vas'kov, V. V.},
  title = {Multiple acceleration of electrons in the regions of
		  high-power radio-wave},
  journal = {Journal of Atmospheric and Terrestrial Physics},
  volume = {47},
  number = {11},
  year = {1985},
  pages = {1057--70},
  abstract = { In a rarefied plasma electron acceleration under the
		  influence of an HF wave }
}
@article{gurevich1992,
  author = {Gurevich, A. V. and Milikh, G. M. and Roussel Dupre, R.},
  title = {Runaway electron mechanism of air breakdown and
		  preconditioning during a},
  journal = {Physics Letters A},
  volume = {165},
  number = {5--6},
  year = {1992},
  pages = {463--8},
  abstract = { The possibility is considered of an avalanche-type
		  increase of the number of }
}
@article{gurevich1994,
  author = {Gurevich, A. V. and Milikh, G. M. and Roussel Dupre, R. A.},
  title = {Nonuniform runaway air-breakdown},
  journal = {Physics Letters A},
  volume = {187},
  number = {2},
  year = {1994},
  pages = {197--203},
  abstract = { The spatial structure of an individual runaway breakdown
		  pulse, stimulated }
}
@article{gurevich1996,
  author = {Gurevich, A. V. and Valdivia, J. A. and Milikh, G. M. and
		  Papadopoulos, K.},
  title = {Runaway electrons in the atmosphere in the presence of a
		  magnetic field},
  journal = {Radio Science},
  volume = {31},
  number = {6},
  year = {1996},
  pages = {1541--54},
  abstract = { This paper generalizes the theory of the electron runaway
		  and runaway }
}
@article{gurevich1997,
  author = {Gurevich, A. V. and Milikh, G. M. and Valdivia, J. A.},
  title = {Model of X-ray emission and fast preconditioning during a
		  thunderstorm},
  journal = {Physics Letters A},
  volume = {231},
  number = {5--6},
  year = {1997},
  pages = {402--8},
  abstract = { A quantitative self-consistent model of the processes
		  determined by the }
}
@article{gurevich1997b,
  author = {Gurevich, A. V. and Milikh, G. M.},
  title = {Artificial airglow due to modifications of the ionosphere
		  by powerful radio},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {A1},
  year = {1997},
  pages = {389--94},
  abstract = { A new model of artificial airglow due to ionospheric
		  modification is }
}
@article{gurevich1997c,
  author = {Gurevich, A. V. and Milikh, G. M.and Valdivia, J. A.},
  title = {Model of X-ray emission and fast preconditioning during a
		  thunderstorm},
  journal = {Physics Letters A},
  volume = {231},
  number = {5--6},
  year = {1997},
  pages = {402--8},
  abstract = { A quantitative self-consistent model of the processes
		  determined by the }
}
@article{hardman1998,
  author = {Hardman, S. F. and Rodger, C. J. and Dowden, R. L. and Brundell,
		  J. B.},
  title = {Measurements of the VLF scattering pattern of the
		  structured plasma of red},
  journal = {IEEE Antennas and Propagation Magazine},
  volume = {40},
  number = {2},
  year = {1998},
  pages = {29--38},
  abstract = {
		  
		  }
}
@article{hardman2000,
  author = {Hardman, S. F. and Dowden, R. L. and Brundell, J. B. and
		  Bahr, J. L. and Kawasaki, Z. and Rodger, C. J.},
  title = {Sprite observations in the Northern Territory of
		  Australia},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D4},
  year = {2000},
  pages = {4689--97},
  abstract = { Sprites, a form of brief luminous discharge in the upper
		  atmosphere above a thunderstorm, were observed and imaged
		  on two video cameras in Australia's Northern Territory.
		  These were the first such ground-based observations made
		  outside the United States. Sprite discharges typically took
		  place between the altitudes of 50 km and 80 km and spanned
		  an average width of 44 km. Many of the sprite events were
		  of long duration, with an average of 145 ms. These spatial
		  and temporal features were similar to those observed from
		  the ground and the air in the United States. During the
		  longer events, some luminous discharge elements were
		  observed to decay as other new elements formed. As the new
		  elements were often laterally displaced from the old, the
		  sprites sometimes appeared to dance across the sky. This
		  phenomenon has been observed in Colorado and named }
}
@article{hayakawa2005jgr,
  author = {{Hayakawa}, M. and {Nakamura}, T. and {Iudin}, D. and {Michimoto}, K. and 
	{Suzuki}, T. and {Hanada}, T. and {Shimura}, T.},
  title = {{On the fine structure of thunderstorms leading to the generation of sprites and elves: Fractal analysis}},
  journal = {J.\ Geophys.\ Res.},
  year = 2005,
  month = {March},
  volume = 110,
  number = {D9},
  pages = {6104-+},
  doi = {10.1029/2004JD004545},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005JGRD..11006104H&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{hobara2001,
  author = {Hobara, Y. and Iwasaki, N. and Hayashida, T. and Hayakawa,
		  M. and Ohta, K. and Fukunishi, H.},
  title = {Interrelation between ELF transients and ionospheric
		  disturbances in association with sprites and elves},
  journal = {Geophysical Research Letters},
  volume = {28},
  number = {5},
  year = {2001},
  pages = {935--8},
  abstract = { Red sprites and elves were observed in Japan during the
		  winter of 1998/99 in Hokuriku region by the group of Tohoku
		  University. The authors analyze quantitatively the results
		  from coordinated measurement consisting of ELF transients,
		  VLF subionopheric disturbances and lightning discharges
		  associated with the optical events. They find the clear
		  straightforward relationship between charge transfer of the
		  parent discharge calculated from ELF (f<15 Hz) and the
		  ionospheric disturbances regardless of the types of optical
		  events indicating significant
		  atmosphere-mesosphere-ionosphere coupling. Sprites tend to
		  associate with a large ionospheric disturbance (-13~+4.6
		  dB) with a large charge transfer (52~175 C), whereas a
		  large lightning peak current (+223~+470 kA) (or slow-tail
		  amplitude) leading to the strong EMP is necessary to
		  initiate elves, but with rather small ionospheric
		  disturbances. }
}
@article{holler1999,
  author = {Holler, H. and Finke, U. and Huntrieser, H. and Hagen, M. and Feigl, C.},
  title = {Lightning-produced NO/sub x/ (LINOX): experimental design and case study},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {D11},
  year = {1999},
  pages = {13911--22},
  abstract = {
	This paper investigates the role of lightning in the production of nitrogen
	}
}
@article{hsu2003,
  author = {Hsu, R. R. and Su, H. T. and Chen, A. B. and Lee, L. C. and Asfur,
		  M. and Price, C. and Yair, Y.},
  title = {Transient luminous events in the vicinity of Taiwan},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {561},
  abstract = {
		  
		  }
}
@article{huntrieser1998,
  author = {Huntrieser, H. and Sclager, H. and Feigl, C. and Holler, H.},
  title = {Transport and production of NO/sub x/ in electrified thunderstorms: survey},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {D21},
  year = {1998},
  pages = {28247--64},
  abstract = {
	First airborne NO/sub x/ (NO+NO/sub 2/) measurements in anvils of active
	}
}
@article{huntrieser2002,
  author = {Huntrieser, H. and Feigl, C. and Schlager, H. and Schroder, F. and Gerbig, C. and van},
  title = {Airborne measurements of NO/sub x/, tracer species, and small particles},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {D11},
  year = {2002},
  pages = {ACH5--1-27},
  abstract = {
	Airborne in situ measurements of NO, NO/sub 2/, NO/sub y/, CO, CO/sub 2/,
	}
}
@article{inan1995,
  author = {Inan, U. S. and Bell, T. F. and Pasko, V. P. and Sentman, D. D. and
		  Wescott, E. M.},
  title = {VLF signatures of ionospheric disturbances associated with
		  sprites},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {24},
  year = {1995},
  pages = {3461--4},
  abstract = { VLF perturbations on signals propagating along
		  great-circle-paths (GCP) }
}
@article{inan1996,
  author = {Inan, U. S. and Reising, S. C. and Fishman, G. J. and Horack, J.
		  M.},
  title = {On the association of terrestrial gamma-ray bursts with
		  lightning and },
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {9},
  year = {1996},
  pages = {1017--20},
  abstract = { Measurements of ELF/VLF radio atmospherics (sterics) at
		  Palmer Station, }
}
@article{inan2002,
  author = {Inan, US},
  title = { Lightning effects at high altitudes: sprites, elves, and
		  terrestrial gamma ray flashes },
  journal = {COMPTES RENDUS PHYSIQUE},
  volume = {3},
  number = {10},
  year = {2002},
  pages = {1411--1421},
  abstract = { A fascinating set of newly discovered complex phenomena
		  indicate that thunderstorms and lightning discharges are
		  strongly coupled to the overlying upper atmospheric
		  regions. Lightning discharges at cloud altitudes (<20 km)
		  affect altitudes >40 km either via the release of intense
		  electromagnetic pulses. (EMPs) and/or the production of
		  intense quasistatic electric (QE) fields. The intense
		  transient QE fields of up to similar to1 kV . m(-1). which
		  for positive CG discharges is directed downwards. can
		  avalanche accelerate upward-driven runaway MeV electron
		  beams. producing brief (similar to1 ms) flashes of gamma
		  radiation. spectacular manifestation of these intense
		  fields is the so-called 'Sprites'. large luminous
		  discharges in the altitude range of similar to40 km to 90
		  km, which are produced by the heating of ambient electrons
		  for a few to tens of milliseconds following intense
		  lightning flashes. The so-called 'Elves' are optical
		  flashes which last much shorter (< 1 ms) than sprites. and
		  are typically limited to 80-95 km altitudes with much
		  larger (up to 600 km) lateral extent. being produced by the
		  heating, ionization, and optical emissions due to the EMPs
		  radiated by both positive and negative lightning
		  discharges. }
}
@article{inan2005grl,
  author = {{Inan}, U.~S. and {Lehtinen}, N.~G.},
  title = {Production of terrestrial gamma-ray flashes by an electromagnetic pulse from a lightning return stroke},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = oct,
  volume = 32,
  pages = {19818-+},
  doi = {10.1029/2005GL023702},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3219818I&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{iudinpre,
  author = {Iudin, D. I. and Trakhtengerts, V. Y. and Hayakawa, M.},
  title = {Fractal dynamics of electric discharges in a thundercloud},
  journal = {Physical Review E}
}
@article{jeker2000,
  author = {Jeker, D. P. and Pfister, L. and Thompson, A. M. and Brunner, D. and Boccippio, D. J.;},
  title = {Measurements of nitrogen oxides at the tropopause: attribution to convection},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D3},
  year = {2000},
  pages = {3679--700},
  abstract = {
	NO/sub x/ (NO and NO/sub 2/) and ozone were measured on 98 flights during
	}
}
@article{jensen2002,
  author = {Jensen, E. and Drdla, K.},
  title = {Nitric acid concentrations near the tropical tropopause: Implications for},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {20},
  year = {2002},
  pages = {62--1-4},
  abstract = {
	In situ measurements of NO/sub y/, NO/sub x/, and temperature confirm that
	}
}
@article{kawakami1997,
  author = {Kawakami, S. and Kondo, Y. and Koike, M. and Nakajima, H. and Gregory, G. L. and Sachse, G.},
  title = {Impact of lightning and convection on reactive nitrogen in the tropical free},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {D23},
  year = {1997},
  pages = {28367--84},
  abstract = {
	Latitudinal distributions of NO, NO/sub y/, O/sub 3/, CO, CH/sub 3/I and
	}
}
@article{koike2003,
  author = {Koike, M. and Kondo, Y. and Klta, K. and Nishi, N. and Liu, S. C. and Blake, D. and Ko, M.;},
  title = {Reactive nitrogen over the tropical western Pacific: influence from},
  journal = {Journal of Geophysical Research},
  volume = {108},
  number = {D3},
  year = {2003},
  pages = {BIB7--1-15},
  abstract = {
	The Biomass Burning and Lightning Experiment phase A (BIBLE A) aircraft
	}
}
@article{kondo2003,
  author = {Kondo, Y. and Koike, M. and Kita, K. and Ikeda, H. and Takegawa, N. and Kawakami, S.;},
  title = {Effects of biomass burning, lightning, and convection on O/sub 3/, CO, and},
  journal = {Journal of Geophysical Research},
  volume = {108},
  number = {D3},
  year = {2003},
  pages = {BIB6--1-20},
  abstract = {
	In situ aircraft measurements of O/sub 3/, CO, total reactive nitrogen
	}
}
@article{kotamarthi1994,
  author = {Kotamarthi, V. R. and Ko, M. K. W. and Weisenstein, D. K. and Rodriguez, J. M. and Sze, N. D.},
  title = {Effect of lightning on the concentration of odd nitrogen species in the},
  journal = {Journal of Geophysical Research},
  volume = {99},
  number = {D4},
  year = {1994},
  pages = {8167--73},
  abstract = {
	Revised model estimates of the effect of lightning on the lower
	}
}
@article{kraus1996,
  author = {Kraus, A. B. and Rohrer, F. and Grobler, E. S. and Ehhalt, D. H.},
  title = {The global tropospheric distribution of NO/sub x/ estimated by a three},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D13},
  year = {1996},
  pages = {18587--604},
  abstract = {
	The global distribution of NO/sub x/ in the troposphere is calculated using
	}
}
@article{krider1992jgr,
  author = {{Krider}, E.~P.},
  title = {Electromagnetic Fields, Poynting Vector, and Peak Power Radiated by Lightning Return Strokes},
  journal = {jgr},
  year = 1992,
  month = oct,
  volume = 97,
  number = 16,
  pages = {15913--15917},
  doi = {10.1029/92JD01490},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1992JGR....9715913K&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{kurihara2003,
  author = {Kurihara, J and Oyama, KI and Takahashi, Y},
  title = { Development of a spectrometer to measure the blue
		  components of sprites },
  journal = {JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {643--646},
  abstract = { Recent spectral measurements of sprites and elves using
		  imaging spectrometers have been limited to the red end of
		  the spectrum (above 500 nm), while spectral information
		  from the blue end of the spectrum has been measured only by
		  bandpass-filtered photometers. Although the blue
		  photometric data identified N-2 second positive and N-2(+)
		  first negative band emissions, uncertainty remains in some
		  measurements due to the small separation in the emission
		  lines. Spectrally resolved measurements of the blue
		  components, particularly the emissions of N-2(+) IN band,
		  are very important because they indicate the existence of
		  relatively high electron energies and high level of
		  ionization at that altitude and therefore can be a great
		  help in uncovering the generation mechanism for sprites. We
		  have recently developed an intensified CCD slit
		  spectrograph system with a peak sensitivity around 350 nm
		  with a highly linear dispersion and a spectral resolution
		  of 2 nm. (C) 2003 Elsevier Scie! }
}
@article{lamarque1996,
  author = {Lamarque, J.  F. and Brasseur, G. P. and Hess, P. G. and Muller, J.  F.},
  title = {Three-dimensional study of the relative contributions of the different},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D17},
  year = {1996},
  pages = {22955--68},
  abstract = {
	A three-dimensional study of the relative importance of the different odd
	}
}
@article{lang2000,
  author = {Lang, T. J. and Rutledge, S. A. and Dye, J. E. and Venticinque, M. and Laroche, P.;},
  title = {Anomalously low negative cloud-to-ground lightning flash rates in intense},
  journal = {Monthly Weather Review},
  volume = {128},
  number = {1},
  year = {2000},
  pages = {160--73},
  abstract = {
	Concurrent measurements from the CSU-CHILL multiparameter Doppler radar, the
	}
}
@article{lange2001,
  author = {Lange, L. and Hoor, P. and Helas, G. and Fischer, H. and Brunner, D. and Scheeren, B. and},
  title = {Detection of lightning-produced NO in the midlatitude upper troposphere},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {D21},
  year = {2001},
  pages = {27777--85},
  abstract = {
	Simultaneous in situ measurements of NO, NO/sub y/, HNO/sub 3/, CO, CO/sub
	}
}
@article{lehtinen1999,
  author = {Lehtinen, N. G. and Bell, T. F. and Inan, U. S.},
  title = {Monte Carlo simulation of runaway MeV electron breakdown
		  with application to},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {A11},
  year = {1999},
  pages = {24699--712},
  abstract = { A three-dimensional Monte Carlo model of the uniform
		  relativistic runaway }
}
@article{lehtinen2001,
  author = {Lehtinen, N. G. and Inan, U. S. and Bell, T. F.},
  title = {Effects of thunderstorm-driven runaway electrons in the
		  conjugate},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {A12},
  year = {2001},
  pages = {28841--56},
  abstract = { The presence of energetic runaway electron beams above
		  thunderstorms is }
}
@article{levy1996,
  author = {Levy, H. , II and Moxim, W. J. and Kasibhatla, P. S.},
  title = {A global three-dimensional time-dependent lightning source of tropospheric},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D17},
  year = {1996},
  pages = {22911--22},
  abstract = {
	The spatial and temporal distribution for a global three-dimensional, time
	}
}
@article{lyons1996,
  author = {Lyons, W. A.},
  title = {Sprite observations above the U.S. High Plains in relation
		  to their parent},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D23},
  year = {1996},
  pages = {29641--52},
  abstract = { Transient luminous events (sprites, blue jets, elves)
		  above large mesoscale }
}
@article{lyons2003,
  author = {Lyons, W. A. and Nelson, T. E. and Williams, E. R. and Cummer, S. A. and Stanley, M. A.},
  title = {Characteristics of sprite-producing positive
		  cloud-to-ground lightning},
  journal = {Monthly Weather Review},
  volume = {131},
  number = {10},
  year = {2003},
  pages = {2417--27},
  abstract = { During the summer of 2000, the Severe Thunderstorm
		  Electrification and }
}
@article{lyons2003b,
  author = {Lyons, WA and Nelson, TE and Armstrong, RA and Pasko, VP
		  and Stanley, MA},
  title = { Upward electrical discharges from thunderstorm tops },
  journal = {BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY},
  volume = {84},
  number = {4},
  year = {2003},
  pages = {445--454},
  abstract = { Mesospheric lightning-related sprites and elves, not
		  attached to their parent thunderstorm's tops, are being
		  joined by a family of upward electrical discharges
		  including blue jets, emerging directly from thunderstorm
		  tops. }
}
@article{mareev1996,
  author = {Mareev, E. A. and Trakhtengerts, V. Yu.},
  title = {On the electric dynamo problem},
  journal = {Radiophysics and Quantum Electronics},
  volume = {39},
  number = {6},
  year = {1996},
  pages = {527--38},
  abstract = {
		  
		  }
}
@article{mareev1996b,
  author = {Mareev, E. A. and Israelsson, S. and Knudsen, E. and Kalinin, A.
		  V. and Novozhenov, M. M.},
  title = {Studies of an artificially generated electrode effect at
		  ground level},
  journal = {Annales Geophysicae},
  volume = {14},
  number = {10},
  year = {1996},
  pages = {1095--101},
  abstract = {
		  
		  }
}
@article{mareev1999,
  author = {Mareev, E. A. and Sorokin, A. E. and Trakhtengerts, V. Yu.},
  title = {Effects of collective charging in a multiflow aerosol
		  plasma},
  journal = {Plasma Physics Reports},
  volume = {25},
  number = {3},
  year = {1999},
  pages = {261--72},
  abstract = {
		  
		  }
}
@article{mareev2001,
  author = {Mareev, E. A. and Sorokin, A. E.},
  title = {Autowave regimes of thundercloud electrification},
  journal = {Radiophysics and Quantum Electronics},
  volume = {44},
  number = {1--2},
  year = {2001},
  pages = {137--50},
  abstract = {
		  
		  }
}
@article{marshall1996,
  author = {Marshall, T. C. and Stolzenburg, M. and Rust, W. D.},
  title = {Electric field measurements above mesoscale convective
		  systems},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D3},
  year = {1996},
  pages = {6979--96},
  abstract = { The authors show that electric field discontinuities
		  occur above the stratiform clouds associated with mesoscale
		  convective systems. Above cloud top, 12 discontinuities
		  were observed at altitudes between 10 and 16 km. The field
		  changes of the discontinuities ranged from -1.1 to -4.0 kV
		  m/sup -1/. The data suggest that the electric field
		  discontinuities were caused by coincident, positive,
		  cloud-to-ground lightning flashes. The coincident ground
		  flashes included both single and multiple return stroke
		  flashes, with first-stroke peak currents between 20 and 154
		  kA. The authors modeled the electric field change that
		  would occur if lightning discharged a horizontally
		  extensive positive charge layer within the stratiform
		  cloud. In the model, disks with charge densities of 1 and 3
		  nC m/sup -3/, a thickness of 400 m, and diameters ranging
		  from 20 to 200 km were discharged and produced field
		  changes similar to the observed above-cloud field
		  discontinuities. The authors' results support the idea that
		  sprites may be initiated by above-cloud field changes
		  caused by positive cloud-to-ground lightning flashes that
		  discharge a horizontally extensive charge region in the
		  stratiform cloud of a mesoscale convective system. During
		  the time between the electric field discontinuities the
		  electric field above the stratiform clouds was -0.5 to -1.0
		  kV m/sup -1/ and this field may be important in the global
		  electrical circuit because the stratiform clouds have large
		  horizontal extents (~10/sup 4/ km/sup 2/). }
}
@article{marshall1998,
  author = {Marshall, L. H. and Hale, L. C. and Croskey, C. L. and
		  Lyons, W. A.},
  title = {Electromagnetics of sprite- and elve-associated sferics},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {7--9},
  year = {1998},
  pages = {771--86},
  abstract = { Electromagnetic data recorded in conjunction with the
		  Sprites '95 campaign are presented. The primary data set
		  consists of electric and magnetic field waveforms related
		  to visually identified sprites and elves recorded on the
		  night of 24-25 July 1995. The data were collected near
		  State College, PA, from a mesoscale convective system (MCS)
		  located about 2100 km away near Lubbock, TX. The optical
		  events were visually identified from an observation station
		  in Fort Collins, CO. Presented are the waveforms of the
		  sferics, a description of the measurement system, and a
		  discussion of the signature traits of optical
		  event-producing sferics. All of the sferics recorded which
		  were related to visually identified events exhibited
		  primarily unipolar `slow tail' electromagnetic signatures
		  of order one millisecond duration in the direction
		  indicating positive lightning. Similar waveforms of
		  opposite polarity, indicating ordinary negative lightning,
		  were not accompanied by any observed high altitude optical
		  events. }
}
@article{marshall2005grl,
  author = {{Marshall}, T.~C. and {Stolzenburg}, M. and {Maggio}, C.~R. and 
	{Coleman}, L.~M. and {Krehbiel}, P.~R. and {Hamlin}, T. and 
	{Thomas}, R.~J. and {Rison}, W.},
  title = {{Observed electric fields associated with lightning initiation}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = {February},
  volume = 32,
  pages = {3813-+},
  doi = {10.1029/2004GL021802},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3203813M&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{martin2002,
  author = {Martin, R. V. and Jacob, D. J. and Logan, J. A. and Bey, I. and Yantosca, R. M. and Staudt, A. C. and Qinbin Li and Fiore, A. M. and Duncan, B. N. and Hongyu Liu and Ginoux, P. and Thouret, V.},
  title = {Interpretation of TOMS observations of tropical tropospheric ozone with a},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {D18},
  year = {2002},
  pages = {ACH4--1-27},
  abstract = {
	We interpret the distribution of tropical tropospheric ozone columns (TTOCs)
	}
}
@article{martynenko2000,
  author = {Martynenko, S. I.},
  title = {A relaxation model of plasma formations during
		  high-altitude discharges},
  journal = {Telecommunications and Radio Engineering},
  volume = {53},
  number = {7--8},
  year = {2000},
  pages = {13--18},
  abstract = { The intense plasma perturbations in the middle
		  atmosphere, produced by the high-altitude discharges and
		  appearing as luminescent columns }
}
@article{mcharg2002,
  author = {McHarg, M. G. and Haaland, R. K. and Moudry, D. and
		  Stenbaek Nielsen, H. C.},
  title = {Altitude-time development of sprites},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {A11},
  year = {2002},
  pages = {SIA9--1-12},
  abstract = { Data from sprites using a 16-channel, multi-anode
		  photometer (MAP) have been recorded at 0.1 ms resolution.
		  The majority of the sprites have onsets at an altitude of
		  70-75 km and subsequently propagate both upward and
		  downward from this initial altitude. The statistical
		  lifetime of the emissions measured by the blue-sensitive
		  MAP is approximately 1.3 ms. The velocities of propagation
		  are between 10/sup 7/ and 10/sup 8/ m s/sup -1/, with
		  larger velocities being measured at higher altitudes. The
		  larger propagation velocities of the upward and downward
		  sprite luminosity channels are consistent with the
		  characteristics of highly over-voltage streamers in the
		  mesosphere. }
}
@article{meijer2000,
  author = {Meijer, E. W. and van Velthoven, P. F. J. and Thompson, A. M. and Pfister, L.},
  title = {Model calculations of the impact of NO/sub x/ from air traffic, lightning,},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D3},
  year = {2000},
  pages = {3833--50},
  abstract = {
	The impact of NO/sub x/ from aircraft emissions, lightning, and surface
	}
}
@article{melnikov2004jastp,
  author = {{Melnikov}, A. and {Price}, C. and {S{\'a}tori}, G. and {F{\"u}llekrug}, M.
	},
  title = {{Influence of solar terminator passages on Schumann resonance parameters}},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  year = 2004,
  month = sep,
  volume = 66,
  pages = {1187-1194},
  doi = {10.1016/j.jastp.2004.05.014},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004JATP...66.1187M&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{mende1995,
  author = {Mende, S. B. and Rairden, R. L. and Swenson, G. R. and Lyons, W.A.},
  title = {Sprite spectra; N/sub 2/ 1 PG band identification},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {19},
  year = {1995},
  pages = {2633--6},
  abstract = { Imagery and spectra of high altitude luminous flashes,
		  otherwise known as }
}
@article{mende1997,
  author = {Mende, S. B. and Sentman, D. D. and Wescott, E. M.},
  title = {Lightning between Earth and space},
  journal = {Scientific American International Edition},
  volume = {277},
  number = {2},
  year = {1997},
  pages = {56--9},
  abstract = { Once dismissed as figments of pilots' imaginations,
		  strange flashes }
}
@article{milikh1990,
  author = {Milikh, G. M.},
  title = {Synthesis of nitric oxide during the formation of an
		  artificially ionized},
  journal = {Journal of Geophysical Research},
  volume = {95},
  number = {D10},
  year = {1990},
  pages = {16451--6},
  abstract = { The artificially ionized layers in the atmosphere caused
		  by microwave pulses }
}
@article{milikh1990b,
  author = {Milikh, G. M.},
  title = {Role of chemical effects in the formation of electron
		  concentration},
  journal = {Journal of Atmospheric and Terrestrial Physics},
  volume = {52},
  number = {2},
  year = {1990},
  pages = {119--23},
  abstract = { A chemical mechanism which reduces the electron
		  concentration in the upper }
}
@article{milikh1994,
  author = {Milikh, G. M. and Freeman, M. J.and Duncan, L. M.},
  title = {First estimates of HF-induced modifications of the D
		  region by the HF Active},
  journal = {Radio Science},
  volume = {29},
  number = {5},
  year = {1994},
  pages = {1355--62},
  abstract = { A one-dimensional, self-consistent computer code was used
		  to predict }
}
@article{milikh1995,
  author = {Milikh, G. M. and Papadopoulos, K. and Chang, C. L.},
  title = {On the physics of high altitude lightning},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {2},
  year = {1995},
  pages = {85--8},
  abstract = { Past and recent observations indicate the presence of
		  lightning at altitudes }
}
@article{milikh1997,
  author = {Milikh, G. M. and Valdivia, J. A. and Papadopoulos, K.},
  title = {Model of red sprite optical spectra},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {8},
  year = {1997},
  pages = {833--6},
  abstract = { A synthetic spectrum of red sprites due to electron
		  energization by the electric field from lightning is
		  computed by using the electron energy spectrum obtained
		  from a Fokker-Planck code, which includes various inelastic
		  losses. The results are compared with observed sprite
		  spectra. Implications to models of red sprites are
		  presented. }
}
@article{milikh1998,
  author = {Milikh, G. and Valdivia, J. A. and Papadopoulos, K.},
  title = {Spectrum of red sprites},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {1998},
  year = {1998},
  abstract = { A synthetic spectrum of red sprites due to electron
		  energization by the }
}
@article{milikh1998b,
  author = {Milikh, G. M. and Usikov, D. A. and Valdivia, J. A.},
  title = {Model of infrared emission from sprites},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {1998},
  year = {1998},
  abstract = { A model of the 4.26 mu m infrared emission due to red
		  sprites is presented. }
}
@article{milikh1999,
  author = {Milikh, G. and Valdivia, J. A.},
  title = {Model of gamma ray flashes due to fractal lightning},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {4},
  year = {1999},
  pages = {525--8},
  abstract = { A model of gamma -ray flashes is presented. The model
		  relies upon a }
}
@article{mironychev2001,
  author = {Mironychev, P. V.},
  title = {Avalanches of runaway relativistic electrons in electric
		  and geomagnetic fields in the atmosphere: numerical
		  experiment},
  journal = {Geomagnetism and Aeronomy},
  volume = {41},
  number = {5},
  year = {2001},
  pages = {660--6},
  abstract = { The development of upward propagating avalanches of
		  runaway electrons in electric and geomagnetic fields above
		  stratiform thunderclouds has been simulated. It is assumed
		  that the quasistationary electric field above the cloud was
		  generated by a lightning, which transferred the negative
		  charge to the cloud top. The avalanche of background
		  electrons has been calculated for an altitude of 30 km and
		  higher, where the electric field was stronger than the
		  threshold (for runaway electrons) electric field. It has
		  been shown that, in the considered cases, the avalanche
		  either faded or slightly developed: the amount of runaway
		  electrons increased by a factor of 3-4, which is
		  insufficient for an initiation of the recently revealed
		  high-altitude (30-80 km) optical flashes called red
		  sprites. The strong dependence of the obtained results on
		  the values and mutual direction of the electric and
		  geomagnetic fields has been corroborated. For example, the
		  horizontal magnetic field (50 mu T) perpendicular to the
		  electric field excludes the development of an avalanche and
		  even the removal of a primary electron with an energy of 2
		  MeV from a starting point. If the geomagnetic field (50 mu
		  T) is strictly vertical and parallel to the electric field,
		  the avalanche develops slowly (as in the case with no
		  magnetic field) and has a considerably smaller cross
		  section. }
}
@article{miyasato2002,
  author = {Miyasato, R. and Taylor, M. J. and Fukunishi, H. and
		  Stenbaek Nielsen, H. C.},
  title = {Statistical characteristics of sprite halo events using
		  coincident photometric and imaging data},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {21},
  year = {2002},
  pages = {29--1-4},
  abstract = { Sprite halos are brief, diffuse flashes, which occur at
		  the top of a sprite and precede the development of streamer
		  structures at lower altitudes. We have investigated the
		  characteristics of sprite halos in detail using coincident
		  photometric and imaging data obtained during the Sprites'96
		  and '99 campaign in Colorado and Wyoming, USA. It is found
		  that the average altitude of the centroid of the halo
		  emission and the mean horizontal diameter of the halo
		  events are ~80 and ~86 km, respectively, while the average
		  speed of the descending motion of the sprite halos was
		  ~4.3*10/sup 7/ m/s. It was also found that the peak current
		  intensity of the causative CG decreases with time delay
		  from the onset of the sferics. }
}
@article{molchanov1994,
  author = {Molchanov, O. A. and Nickolaenko, A. P. and Rafalsky, V. A. and
		  Schecotov, A. Yu.},
  title = {Influence of layered structure of the lower ionosphere on
		  nonmonotonic},
  journal = {Geophysical Research Letters},
  volume = {21},
  number = {23},
  year = {1994},
  pages = {2467--70},
  abstract = { This paper reports on some propagation effects occurring
		  while the }
}
@article{moore2003,
  author = {Moore, R. C. and Barrington Leigh, C. P. and Inan, U. S. and Bell, T. F.},
  title = {Early/fast VLF events produced by electron density changes associated with},
  journal = {Journal of Geophysical Research},
  volume = {108},
  number = {A10},
  year = {2003},
  pages = {SIA1--1-8},
  abstract = {
	The magnitudes of scattered fields produced during early/fast very low
	}
}
@article{morozov2002,
  author = {Morozov, V. N.},
  title = {Calculation of thundercloud electric fields for initiating
		  electric discharges between clouds and the upper
		  atmosphere},
  journal = {Geomagnetism and Aeronomy},
  volume = {42},
  number = {1},
  year = {2002},
  pages = {114--22},
  abstract = { Nonstationary electric fields of thunderclouds, which are
		  created by these clouds after cloud-to-ground discharges in
		  the atmosphere with exponential electrical conductivity,
		  are calculated in an electrostatic approximation. The
		  asymptotic expressions for the distribution of the vertical
		  component of the electrostatic intensity, depending on time
		  and atmospheric altitude along the axis of symmetry, have
		  been obtained for the point and one-dimensional
		  distributions of the initial cloud charge, as well as for
		  the horizontal distribution of the cloud with a finite
		  cylindrical radius. These results are used to determine the
		  vertical component of the electrostatic intensity and the
		  cloud charges necessary for initiating discharges between
		  clouds and the upper atmosphere. }
}
@article{morrill2002,
  author = {Morrill, J and Bucsela, E and Siefring, C and Heavner, M
		  and Berg, S and Moudry, D and Slinker, S and Fernsler, R
		  and Wescott, E and Sentman, D and Osborne, D},
  title = { Electron energy and electric field estimates in sprites
		  derived from ionized and neutral N-2 emissions },
  journal = {GEOPHYSICAL RESEARCH LETTERS},
  volume = {29},
  number = {10},
  year = {2002},
  pages = {1462:4 pp.},
  abstract = { [1] During the EXL98 aircraft mission, sprites and blue
		  jets were observed by narrow band cameras that measure the
		  N-2(+) 1NG (0,1) band at 4278Angstrom and the N-2 2PG (0,
		  0) band at 3370Angstrom. We discuss the observations
		  (similar to1 km resolution), instrumental and atmospheric
		  corrections, and altitude profiles of ionized (1NG) and
		  neutral (2PG) emission observed during a specific sprite.
		  The ratio of ionized-to-neutral emission indicates a
		  relative enhancement of ion emission below 55 km.
		  Characteristic electron energies (E-Ch) and electric fields
		  (E) are derived from these emission ratios using excitation
		  rates computed from a model that solves the Boltzmann
		  equation as a function of electric field. Up to 55km E
		  follows the breakdown field (E-k) and E-Ch is similar
		  to2.2eV. Above 55 km E drops below E-k and E-Ch drops to
		  similar to1.75eV near 60km. }
}
@article{moudry2002grl,
  author = {Moudry, D. R. and Stenbaek Nielsen, H. C. and Sentman, D.
		  D. and Wescott, E. M.},
  title = {Velocities of sprite tendrils},
  journal = {Geophys.\ Res.\ Lett.},
  volume = {29},
  number = {20},
  year = {2002},
  pages = {53--1-4},
  abstract = { The University of Alaska deployed a high speed (1000 fps)
		  camera at the Wyoming Infrared Observatory to observe
		  sprites over Midwest U.S. thunderstorms as part of the 1999
		  NASA Sprites Balloon Campaign. Here we report on the
		  velocity of development of downward spatial structures
		  known as tendrils in several sprite events recorded during
		  a large thunderstorm over eastern Nebraska the night of 18
		  August 1999. Downward tendril development occurred at
		  velocities that varied by more than two orders of
		  magnitude, ranging from ~10/sup 5/ to >or=3*10/sup 7/ m/s.
		  The tendrils progressed through multiple velocity regimes,
		  typically in the order fast-slow or slow-fast-slow.
		  Examples are presented of multiple sets of temporally
		  distinct tendrils that develop from the same sprite event
		  and tendrils that have a horizontal component of expansion.
		  }
}
@article{moudry2003jastp,
  author = {Moudry, D. and Stenbaek Nielsen, H. and Sentman, D. and Wescott,
		  E.},
  title = {Imaging of elves, halos and sprite initiation at 1 ms time
		  resolution},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {509},
  abstract = { Elves, halos and sprites were observed during August 1999
		  with a 1 ms high }
}
@article{moudry2003jastpb,
  author = {Moudry, D. and Stenbaek Nielsen, H. and Sentman, D. and Wescott, E.},
  title = {Reply to comment on ...},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {523},
  abstract = { For original paper see ibid., vol. 65, no.5, p.509-18
		  (2003); for comment }
}
@article{nemiroff1997,
  author = {Nemiroff, R. J. and Bonnell, J. T. and Norris, J. P.},
  title = {Temporal and spectral characteristics of terrestrial gamma
		  flashes},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {A5},
  year = {1997},
  pages = {9659--65},
  abstract = { The authors have analyzed the Burst and Transient Source
		  Experiment (BATSE) high-resolution timing data for 13
		  terrestrial gamma flashes (TGFs) to better characterize
		  this newly identified phenomenon, which may be related to
		  atmospheric lightning. They find that the minimum timescale
		  for TGF variability is ~25-250 mu s, with 50 mu s near
		  typical. In general, TGFs are spectrally much harder than
		  cosmic gamma ray bursts (GRBs). They additionally find that
		  as with GRBs, individual pulses within a TGF tend to peak
		  earlier at higher energies. This time-asymmetry rules out
		  models such as sweeping beams. They also find that
		  different pulses can have different spectra, with spectra
		  typically softening as a pulse progresses. Event-averaged
		  spectra for the TGFs were examined and found to be better
		  fit in the 25-500 keV range by a power law than by a
		  blackbody model. However, in general, even a power law is
		  not a perfect fit. They find correlation between minimum
		  TGF timescale and the power law spectral index, with
		  rapidly varying TGFs appearing softer. From empirical
		  comparisons of timescales and structures they speculate
		  that if TGFs are somehow related to known high-atmospheric
		  lightning events, then they are more probably related to
		  red sprites than to blue jets or transionospheric pulse
		  pairs. }
}
@article{nickolaenko1995,
  author = {Nickolaenko, A. P. and Hayakawa, M.},
  title = {Heating of the lower ionosphere electrons by
		  electromagnetic radiation of},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {22},
  year = {1995},
  pages = {3015--18},
  abstract = { An analysis is performed on the heating of electrons in
		  the lower ionosphere }
}
@article{nickolaenko1996,
  author = {Nickolaenko, A. P. and Hayakawa, M. and Hobara, Y.},
  title = {Temporal variations of the global lightning activity
		  deduced from the},
  journal = {Journal of Atmospheric and Terrestrial Physics},
  volume = {58},
  number = {15},
  year = {1996},
  pages = {1699--709},
  abstract = { Temporal variations of the global lightning activity were
		  deduced from long }
}
@article{nickolaenko1998,
  author = {Nickolaenko, A. P. and Hayakawa, M.},
  title = {Electric fields produced by lightning discharges},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {D14},
  year = {1998},
  pages = {17175--89},
  abstract = { The time domain electric field produced by the model
		  lightning discharges in }
}
@article{nickolaenko1998b,
  author = {Nickolaenko, A. P. and Hayakawa, M.},
  title = {Natural electromagnetic pulses in the ELF range},
  journal = {Geophysical Research Letters},
  volume = {25},
  number = {16},
  year = {1998},
  pages = {3103--6},
  abstract = { Analyzes the propagation of electromagnetic waves in the
		  ELF. The authors }
}
@article{nickolaenko1999,
  author = {Nickolaenko, A. P. and Hayakawa, M. and Hobara, Y.},
  title = {Long-term periodical variations in global lightning
		  activity deduced from},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {D22},
  year = {1999},
  pages = {27585--91},
  abstract = { Deduces temporal variations of the level of global
		  lighting activity from }
}
@article{nickolaenko1999b,
  author = {Nickolaenko, A. P. and Hayakawa, M. and Kudintseva, I. G. and
		  M and, S. V.},
  title = {ELF sub-ionospheric pulse in time domain},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {7},
  year = {1999},
  pages = {999--1002},
  abstract = { The authors present an analytical time domain solution
		  for ELF }
}
@article{nickolaenko1999c,
  author = {Nickolaenko, A. P. and Hayakawa, M.and Hobara, Y.},
  title = {Long-term periodical variations in global lightning
		  activity deduced from},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {D22},
  year = {1999},
  pages = {27585--91},
  abstract = { Deduces temporal variations of the level of global
		  lighting activity from }
}
@article{nunn1999,
  author = {Nunn, D. and Rodger, C. J.},
  title = {Modeling the relaxation of red sprite plasma},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {21},
  year = {1999},
  pages = {3293--6},
  abstract = { Red sprites consist of multiple ionised columns extending
		  above a thunderstorm from ~30 km to ~90 km. Electron
		  densities in these columns are very much larger than the
		  ambient background, perhaps fives orders of magnitude at 70
		  km. These highly ionized structures cause observable
		  perturbations in subionospheric VLF transmissions known as
		  }
}
@article{otsuyama,
  author = {Otsuyama, T. and Hayakawa, M.},
  title = {FDTD simulation and experimental result on VLF scattering
		  by ionospheric},
  journal = {Transactions of the Institute of Electrical Engineers of
		  Japan, Part A},
  abstract = { Amplitude and phase perturbations on subionospheric VLF
		  signals (known as }
}
@article{pasko1995,
  author = {Pasko, V. P. and Inan, U. S. and Taranenko, Y. N. and Bell, T.
		  F.},
  title = {Heating, ionization and upward discharges in the
		  mesosphere due to intense},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {4},
  year = {1995},
  pages = {365--8},
  abstract = { Quasi-electrostatic fields that temporarily exist at high
		  altitudes }
}
@article{pasko1996,
  author = {Pasko, V. P. and Inan, U. S. and Bell, T. F.},
  title = {Sprites as luminous columns of ionization produced by
		  quasi-electrostatic thundercloud fields},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {6},
  year = {1996},
  pages = {649--52},
  abstract = { Quasi-electrostatic (QE) fields which exist above
		  thunderclouds after lightning discharges can lead to the
		  formation of columnar channels of breakdown ionization and
		  carrot-like vertical luminous structures with typical
		  transverse dimension ~5-10 km spanning an altitude range
		  from ~80 km to well below ~50 km. The carrot-like forms
		  closely resemble those observed in sprites. Results
		  indicate that the appearance of optical emissions can be
		  significantly delayed in time (~1-20 ms) with respect to
		  the causative lightning discharge. }
}
@article{pasko1997,
  author = {Pasko, V. P. and Inan, U. S. and Bell, T. F.},
  title = {Sprites as evidence of vertical gravity wave structures
		  above mesoscale},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {14},
  year = {1997},
  pages = {1735--8},
  abstract = { Large area multicell thunderstorms lead to the formation
		  of vertically }
}
@article{pasko1997b,
  author = {Pasko, V. P. and Inan, U. S. and Bell, T. F. and
		  Taranenko, Y. N.},
  title = {Sprites produced by quasi-electrostatic heating and
		  ionization in the lower ionosphere},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {A3},
  year = {1997},
  pages = {4529--61},
  abstract = { Quasi-electrostatic (QE) fields that temporarily exist at
		  high altitudes following the sudden removal (e.g., by a
		  lightning discharge) of thundercloud charge at low
		  altitudes lead to ambient electron heating (up to ~5 eV
		  average energy), ionization of neutrals, and excitation of
		  optical emissions in the mesosphere/lower ionosphere. Model
		  calculations predict the possibility of significant
		  (several orders of magnitude) modification of the lower
		  ionospheric conductivity in the form of depletions of
		  electron density due to dissociative attachment to O/sub 2/
		  molecules and/or in the form of enhancements of electron
		  density due to breakdown ionization. Results indicate that
		  the optical emission intensities of the 1st positive band
		  of N/sub 2/ corresponding to fast (~1 ms) removal of
		  100-300 degrees C of thundercloud charge from 10 km
		  altitude are in good agreement with observations of the
		  upper part }
}
@article{pasko1998,
  author = {Pasko, V. P. and Inan, U. S. and Bell, T. F. and Reising, S. C.},
  title = {Mechanism of ELF radiation from sprites},
  journal = {Geophysical Research Letters},
  volume = {25},
  number = {18},
  year = {1998},
  pages = {3493--6},
  abstract = { Charge and current systems associated with sprites
		  constitute a part of the }
}
@article{pasko2001,
  author = {Pasko, VP and Inan, US and Bell, TF},
  title = { Mesosphere-troposphere coupling due to sprites },
  journal = {GEOPHYSICAL RESEARCH LETTERS},
  volume = {28},
  number = {19},
  year = {2001},
  pages = {3821--3824},
  abstract = { Results from a new three-dimensional fractal model of
		  sprites as well as recent experimental data on thundercloud
		  charge moment changes associated with sprites indicate that
		  ionized regions in sprites can sometimes reach thundercloud
		  tops, creating favorable conditions for establishing a
		  highly conducting link between the Earth's surface and the
		  lower ionosphere. }
}
@article{pasko2002,
  author = {Pasko, V. P. and Stenbaek Nielsen, H. C.},
  title = {Diffuse and streamer regions of sprites},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {10},
  year = {2002},
  pages = {82--1-4},
  abstract = { The observed altitude stratification in large number of
		  sprite events, }
}
@article{pasko2002b,
  author = {Pasko, VP and George, JJ},
  title = { Three-dimensional modeling of blue jets and blue starters
		  },
  journal = {JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS},
  volume = {107},
  number = {A12},
  year = {2002},
  pages = {1458:16 pp.},
  abstract = { [1] Blue jets and blue starters are considered as
		  positive streamer coronas expanding from the streamer zones
		  of conventional lightning leaders under conditions when
		  large-scale electric fields near the thundercloud tops
		  exceed the minimum field required for the propagation of
		  positive streamers in air. Results from a three-dimensional
		  fractal model based on a phenomenological probabilistic
		  approach to the modeling of streamer coronas indicate, in
		  particular, that blue jets and blue starters can be formed
		  by a fast (similar to1 s) accumulation of similar to110-150
		  C of positive thundercloud charge distributed in a volume
		  with effective radius similar to3 km near the cloud top at
		  similar to15 km. The model simulates the propagation of
		  branching streamer channels constituting blue jets and blue
		  starters as a three-dimensional growth of fractal trees in
		  the electric field created by thundercloud charges and
		  self-consistently accounts for the electric field effects
		  due to the! }
}
@article{penner1998,
  author = {Penner, J. E. and Bergmann, D. J. and Walton, J. J. and Kinnison, D. and Prather, M. J.;},
  title = {An evaluation of upper troposphere NO/sub x/ with two models},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {D17},
  year = {1998},
  pages = {22097--113},
  abstract = {
	Upper tropospheric NO/sub x/ controls, in part, the distribution of ozone in
	}
}
@article{peter2005jgr,
  author = {{Peter}, W.~B. and {Inan}, U.~S.},
  title = {Electron precipitation events driven by lightning in hurricanes},
  journal = {J.\ Geophys.\ Res.},
  year = 2005,
  month = may,
  volume = 110,
  number = {A9},
  pages = {5305-+},
  doi = {10.1029/2004JA010899},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005JGRA..11005305P&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{petrov1999,
  author = {Petrov, N. I. and Petrova, G. N.},
  title = {Physical mechanisms for the development of lightning
		  discharges between a thundercloud and the ionosphere},
  journal = {Technical Physics},
  volume = {44},
  number = {4},
  year = {1999},
  pages = {472--5},
  abstract = { An investigation is made of the influence of changes in
		  atmospheric pressure with altitude and the thundercloud
		  geometry on the development of lightning propagating upward
		  to the ionosphere. It is shown that the mechanism for the
		  development of high-altitude lightning does not differ from
		  that for the formation and propagation of ordinary
		  lightning between a thundercloud and the ground. It is
		  established that high-altitude lightning forms as a result
		  of a reduction in pressure with altitude and can only take
		  place from thunderclouds located at high altitudes. }
}
@article{pickering1998,
  author = {Pickering, K. E. and Yansen Wang and Wei Kuo Tao and Price, C. and Muller, J.  F.},
  title = {Vertical distributions of lightning NO/sub x/ for use in regional and global},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {D23},
  year = {1998},
  pages = {31203--16},
  abstract = {
	The authors have constructed profiles of lightning NO/sub x/ mass
	}
}
@article{price1993grl,
  author = {{Price}, C. and {Rind}, D.},
  title = {{What determines the cloud-to-ground lightning fraction in thunderstorms?}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 1993,
  month = mar,
  volume = 20,
  pages = {463-466},
  doi = {10.1029/93GL00226},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1993GeoRL..20..463P&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{price1997,
  author = {Price, C. and Penner, J. and Prather, M.},
  title = {NO/sub x/ from lightning. 1. Global distribution based on lightning physics},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {D5},
  year = {1997},
  pages = {5929--41},
  abstract = {
	This paper begins a study on the role of lightning in maintaining the global
	}
}
@article{price1997b,
  author = {Price, C. and Penner, J. and Prather, M.},
  title = {NO/sub x/ from lightning. 2. Constraints from the global atmospheric},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {D5},
  year = {1997},
  pages = {5943--51},
  abstract = {
	For pt.1 see ibid., vol.102, no.D5, p.5929-41 (1997). The global atmospheric
	}
}
@article{price2000emp,
  author = {{Price}, C. and {Blum}, M.},
  title = {{ELF/VLF Radiation Produced by the 1999 Leonid Meteors}},
  journal = {Earth Moon and Planets},
  year = 2000,
  volume = 82,
  pages = {545-554},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2000EM%26P...82..545P&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{price2001jastp,
  author = {{Price}, C. and {Mushtak}, V.},
  title = {{The impact of the August 27, 1998, /{$\gamma$}-ray burst on the Schumann resonances}},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  year = 2001,
  month = jul,
  volume = 63,
  pages = {1043-1047},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2001JATP...63.1043P&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{price2002,
  author = {Price, C. and Asfur, M. and Lyons, W. and Nelson, T.},
  title = {An improved ELF/VLF method for globally geolocating
		  sprite-producing lightning},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {3},
  year = {2002},
  pages = {1--1-4},
  abstract = { The majority of sprites, the most common of transient
		  luminous events (TLEs) in the upper atmosphere, are
		  associated with a sub-class of positive cloud-to-ground
		  lightning flashes (+CGs) whose characteristics are slowly
		  being revealed. These +CGs produce extremely low frequency
		  (ELF) and very low frequency (VLF) radiation detectable at
		  great distances from the parent thunderstorm. During the
		  STEPS field program in the United States, ELF/VLF
		  transients associated with sprites were detected in the
		  Negev Desert, Israel, some 11000 km away. Within a two-hour
		  period on 4 July 2000, all of the sprites detected
		  optically in the United States produced detectable ELF/VLF
		  transients in Israel. All of these transients were of
		  positive polarity (representing positive lightning). Using
		  the VLF data to obtain the azimuth of the transients, and
		  the ELF data to calculate the distance between the source
		  and receiver, we remotely determined the position of the
		  sprite-forming lightning with an average locational error
		  of 184 km (error of 1.6\%). }
}
@article{price2002b,
  author = {Price, C. and Burrows, W. and King, P.},
  title = {The likelihood of winter sprites over the Gulf Stream},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {22},
  year = {2002},
  pages = {27--1-4},
  abstract = {
	With the recent introduction of the Canadian Lightning Detection Network
	}
}
@article{price2004grl,
  author = {{Price}, C. and {Greenberg}, E. and {Yair}, Y. and {S{\'a}tori}, G. and 
	{B{\'o}r}, J. and {Fukunishi}, H. and {Sato}, M. and {Israelevich}, P. and 
	{Moalem}, M. and {Devir}, A. and {Levin}, Z. and {Joseph}, J.~H. and 
	{Mayo}, I. and {Ziv}, B. and {Sternlieb}, A.},
  title = {{Ground-based detection of TLE-producing intense lightning during the MEIDEX mission on board the space shuttle Columbia}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2004,
  month = oct,
  volume = 31,
  pages = {20107-+},
  doi = {10.1029/2004GL020711},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004GeoRL..3120107P&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{price2004jastp,
  author = {{Price}, C. and {Melnikov}, A.},
  title = {{Diurnal, seasonal and inter-annual variations in the Schumann resonance parameters}},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  year = 2004,
  month = sep,
  volume = 66,
  pages = {1179-1185},
  doi = {10.1016/j.jastp.2004.05.004},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004JATP...66.1179P&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{qie1994,
  author = {Qie, N. and Soula, S. and Chauzy, S.},
  title = {Influence of ion attachment on the vertical distribution of the electric},
  journal = {Annales Geophysicae},
  volume = {12},
  number = {12},
  year = {1994},
  pages = {1218--28},
  abstract = {
	A numerical model called PICASSO [Production d'Ions Corona Au Sol Sous Orage
	}
}
@article{rairden1995,
  author = {Rairden, R. L. and Mende, S. B.},
  title = {Time resolved sprite imagery},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {24},
  year = {1995},
  pages = {3465--8},
  abstract = { Fleeting columns of luminosity occurring above large
		  thunderstorms at 50-90 km altitude, presently known as
		  sprites, were imaged with an intensified video charge
		  coupled device (CCD) camera during a July 1995 ground-based
		  campaign near Fort Collins, Colorado. These unfiltered
		  intensified images reveal detailed spatial structure within
		  the sprite envelope. The temporal resolution of standard
		  interlaced video imagery is limited by the 60 fields per
		  second acquisition rate (16 ms). The specific CCD used,
		  however, is subject to bright events leaking into the
		  readout registers, allowing time-resolution on the order of
		  the linescan rate (63 mu s). Typical sprite onset is found
		  to follow the associated cloud lightning by 1.5 to 4 ms.
		  The onsets of the individual sprites within a cluster are
		  generally, but not always, simultaneous to within 1 ms.
		  Sprites tend to have a bright localized core, less than 2
		  km in horizontal dimension, which rises to peak intensity
		  within 0.3 ms and maintains this level for 5 to 10 ms
		  before fading over an additional 10 ms. }
}
@article{raizer1998,
  author = {Raizer, Yu. P. and Milikh, G. M. and Shneider, M. N. and
		  Novakovski, S. V.},
  title = {Long streamer in the upper atmosphere above thundercloud},
  journal = {Journal of Physics D Applied Physics},
  volume = {31},
  number = {22},
  year = {1998},
  pages = {3255--64},
  abstract = { It has been suggested that optical flashes observed in
		  the upper atmosphere above giant thunderstorms (red
		  sprites) are due to streamers. Such streamers are initiated
		  in the lower ionosphere by electron patches caused by
		  electromagnetic radiation from horizontal intracloud
		  lightning and then develop downward in the static electric
		  field due to the thundercloud. The triggering conditions of
		  streamer development are analysed. Using similarity
		  relations, known characteristics of streamer tips obtained
		  earlier in laboratory conditions are extended to a
		  description of streamers in rare air. Streamer growth in
		  the nonuniform atmosphere is calculated. It is shown that
		  streamers first appear at a height of about 80 km and then
		  grow downward to slightly below 50 km, where they are
		  terminated. This is in agreement with red sprite
		  observations. An altitude distribution of the streamer
		  generated plasma is obtained. The simple models of streamer
		  development presented in this paper could be applied for
		  computations of streamers growing in other conditions. }
}
@article{rakov2003,
  author = {Rakov, VA and Tuni, WG},
  title = { Lightning electric field intensity at high altitudes:
		  Inferences for production of elves },
  journal = {JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES},
  volume = {108},
  number = {D20},
  year = {2003},
  pages = {4639:6 pp.},
  abstract = { [1] Distant electric fields predicted by the transmission
		  line (TL) model and by the modified transmission line model
		  with exponential current decay with height (MTLE) are
		  examined as a function of polar angle ( elevation) and
		  return stroke propagation speed. The lightning return
		  stroke current waveform was approximated by a step
		  function. The resultant electric field waveform for the TL
		  model is also a step function, while for the MTLE model the
		  field instantaneously rises to the same value as for the TL
		  model and then decays exponentially. The exponential
		  current attenuation with height in the MTLE model results
		  in a considerable reduction in the electric field intensity
		  within 1 mus after the initial peak, particularly for
		  smaller polar angles ( larger elevations) and higher
		  propagation speeds. Combinations of current and speed ( as
		  a function of polar angle) that are conducive to the
		  production of transient optical emissions ( elves) in the
		  lower ionosphere are examin! }
}
@article{reising1996,
  author = {Reising, S. C. and Inan, U. S. and Bell, T. F. and Lyons,
		  W. A.},
  title = {Evidence for continuing current in sprite-producing
		  cloud-to-ground lightning},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {24},
  year = {1996},
  pages = {3639--42},
  abstract = { Radio atmospherics launched by sprite-producing positive
		  cloud-to-ground lightning flashes and observed at Palmer
		  Station, Antarctica, exhibit large ELF slow tails following
		  the initial VLF portion, indicating the presence of
		  continuing currents in the source lightning flashes.
		  One-to-one correlation of sferics with NLDN lightning data
		  in both time and arrival azimuth, measured with an accuracy
		  of +or-1 degrees at ~12,000 km range, allows unambiguous
		  identification of lightning flashes originating in the
		  storm of interest. Slow-tail measurements at Palmer can
		  potentially be used to measure continuing currents in
		  lightning flashes over nearly half of the Earth's surface.
		  }
}
@article{reising1999,
  author = {Reising, S. C. and Inan, U. S.and Bell, T. F.},
  title = {ELF sferic energy as a proxy indicator for sprite
		  occurrence},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {7},
  year = {1999},
  pages = {987--90},
  abstract = { Broadband ELF/VLF measurements of sferics near Ft.
		  Collins, Colorado, }
}
@article{ridley1996,
  author = {Ridley, B. A. and Dye, J. E. and Walega, J. G. and Zheng, J. and Grahek, F. E. and Rison, W.},
  title = {On the production of active nitrogen by thunderstorms over New Mexico},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D15},
  year = {1996},
  pages = {20985--1005},
  abstract = {
	In July and August of 1989 the National Center for Atmospheric Research
	}
}
@article{rocco2002pre,
  author = {Rocco, A. and Ebert, U. and Hundsdorfer, W.},
  title = {Branching of negative streamers in free flight},
  journal = {Physical Review E},
  volume = {66},
  year = {2002},
  abstract = {
	We have recently shown that a negative streamer in a sufficiently high
	}
}
@article{rodger1997,
  author = {Rodger, C. J. and Wait, J. R. and Dowden, R. L.},
  title = {Electromagnetic scattering from a group of thin conducting
		  cylinders},
  journal = {Radio Science},
  volume = {32},
  number = {3},
  year = {1997},
  pages = {907--12},
  abstract = {
		  
		  }
}
@article{rodger1998,
  author = {Rodger, C. J. and Wait, J. R. and Dowden, R. L. and Thomson, N.
		  R.},
  title = {Radiating conducting columns inside the Earth-ionosphere
		  waveguide:},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {12},
  year = {1998}
}
@article{rodger1998b,
  author = {Rodger, C. J. and Wait, J. R. and Dowden, R. L.},
  title = {Scattering of VLF from an experimentally described sprite},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {1998},
  year = {1998}
}
@article{rodger1998c,
  author = {Rodger, C. J. and Wait, J. R. and Dowden, R. L.},
  title = {VLF scattering from red sprites-theory},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {1998},
  year = {1998}
}
@article{rodger1998d,
  author = {Rodger, C. J. and Thomson, N. R. and Dowden, R. L.},
  title = {Testing the formulation of Park and Dejnakarintra to
		  calculate thunderstorm},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {A2},
  year = {1998},
  pages = {2171--8}
}
@article{rodger1998e,
  author = {Rodger, C. J. and Thomson, N. R. and Dowden, R. L.},
  title = {Are whistler ducts created by thunderstorm electrostatic
		  fields?},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {A2},
  year = {1998},
  pages = {2163--9}
}
@article{rodger1998f,
  author = {Rodger, C. J. and Dowden, R. L.},
  title = {Position determination of red sprites by scattering of VLF
		  subionospheric},
  journal = {Geophysical Research Letters},
  volume = {25},
  number = {3},
  year = {1998},
  pages = {281--4}
}
@article{rodger2002,
  author = {Rodger, C. J. and Clilverd, M. A. and Dowden, R. L.},
  title = {D region reflection height modification by
		  whistler-induced electron},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {A7},
  year = {2002},
  pages = {SIA18--1-11}
}
@article{rodger2005anngeo,
  author = {{Rodger}, C.~J. and {Brundell}, J.~B. and {Dowden}, R.~L.},
  title = {{Location accuracy of VLF World-Wide Lightning Location (WWLL) network: Post-algorithm upgrade}},
  journal = {Ann.\ Geophys.},
  year = 2005,
  month = {February},
  volume = 23,
  pages = {277-290},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005AnGeo..23..277R&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{rousseldupre1996,
  author = {Roussel Dupre, R. and Gurevich, A. V.},
  title = {On runaway breakdown and upward propagating discharges},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {A2},
  year = {1996},
  pages = {2297--311},
  abstract = { The origins of mysterious gamma -ray and radio flashes
		  recently detected by satellite-based instruments passing
		  over thunderstorms are examined in the context of upward
		  propagating discharges initiated by runaway air breakdown.
		  Preliminary calculations normalized by the recent optical
		  measurements of so-called sprites indicate that the runaway
		  mechanism may well be the source of these emissions. If
		  this is true, then upward discharges represent the first
		  known manifestation of a fundamental, new process in plasma
		  physics. }
}
@article{rousseldupre1997jgr,
  author = {Roussel Dupre, R. and Fitzgerald, T. J. and Symbalisty, E. and Blanc, E.},
  title = {HF echoes from ionization potentially produced by
		  high-altitude discharges},
  journal = {J.\ Geophys.\ Res.},
  volume = 102,
  number = {A3},
  year = 1997,
  pages = {4613--4622}
}
@article{rousseldupre1998,
  author = {Roussel Dupre, R. and Symbalisty, E. and Taranenko, Y. and
		  Yukhimuk, V.},
  title = {Simulations of high-altitude discharges initiated by
		  runaway breakdown},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {1998},
  year = {1998},
  pages = {}
}
@article{rycroft2000,
  author = {Rycroft, M. J. and Israelsson, S. and Price, C.},
  title = {The global atmospheric electric circuit, solar activity
		  and climate change},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {62},
  number = {17--18},
  year = {2000},
  pages = {1563--76},
  abstract = { The study of the global atmospheric electric circuit has
		  advanced dramatically in the past 50 years. Large advances
		  have been made in the areas of lightning and thunderstorm
		  research. The authors now have satellites looking down on
		  the Earth continuously, supplying information on the
		  temporal and spatial variability of lightning and
		  thunderstorms. Thunderstorms are electric current
		  generators, which drive electric currents up through the
		  conducting atmosphere. They maintain the ionosphere at a
		  potential of ~+250 kV with respect to the Earth's surface.
		  The global electric circuit is completed by currents ~2
		  pA/m/sup 2/ flowing through the fair weather atmosphere,
		  remote from thunderstorms, and by transient currents due to
		  negative cloud-to-ground lightning discharges. The time
		  constant of the circuit, ~>2 min, demonstrates that
		  thunderstorms must occur continually to maintain the fair
		  weather electric field. New discoveries have been made in
		  the field of sprites, elves and blue jets, which may have a
		  direct impact on the global circuit. Our knowledge of the
		  global electric circuit modulated by solar effects has
		  improved. Changes to the global circuit are associated with
		  changes of conductivity linked with the time-varying
		  presence of energetic charged particles, and the solar wind
		  may influence the global electric circuit by inferred
		  effects on cloud microphysics, temperature, and dynamics in
		  the troposphere. We now have a better understanding of how
		  the conductivity of the atmosphere is influenced by
		  aerosols, and bow this impacts our measurements of the
		  fair-weather global circuit. }
}
@article{saba2000,
  author = {Saba, MMF and Pinto, O and Pinto, IRCA and Mendes, O},
  title = { Stratospheric balloon measurements of electric fields
		  associated with thunderstorms and lightning in Brazil },
  journal = {JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES},
  volume = {105},
  number = {D14},
  year = {2000},
  pages = {18091--18097},
  abstract = { Measurements of electric fields associated with
		  thunderstorms and lightning were obtained during two
		  balloon flights carrying double-probe electric field
		  detectors launched from Cachoeira Paulista (22 degrees
		  44'S, 44 degrees 56'W), Brazil, on January 26, 1994, and
		  March 23, 1995. From data obtained in 1994, a linear
		  relationship between the quasi-dc vertical electric field
		  peak amplitude and the decay time constant of lightning
		  signatures was found for negative flashes. The results are
		  compared to similar data for intracloud flashes. Based on
		  electric field data obtained in 1995 and on the present
		  knowledge about the differences between positive
		  cloud-to-ground and intracloud flashes, two methods to
		  distinguish them at balloon altitudes are presented: The
		  first is based on an estimate of the destroyed charge in
		  the event; the second is based on the peak amplitude ratio
		  between the vertical quasi-de and the VLF electric field.
		  The behavior of the vertical quasi-de electri! }
}
@article{saosabbas2003grl,
  author = {{Sao Sabbas}, F.~T. and {Sentman}, D.~D.},
  title = {{Correction to ``Dynamical relationship of infrared cloudtop temperatures with occurrence rates of cloud-to-ground lightning and sprites''}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2003,
  month = jul,
  volume = 30,
  pages = {26-1},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2003GeoRL..30m..26S&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{saosabbas2003grlb,
  author = {Sao Sabbas, F. T. and Sentman, D. D.},
  title = {Dynamical relationship of infrared cloudtop temperatures with occurrence rates of cloud-to-ground lightning and sprites},
  journal = {Geophysical Research Letters},
  volume = {30},
  number = {5},
  year = {2003},
  pages = {40--4},
  abstract = {
	We correlated cloudtop temperatures obtained from GOES-8 infrared images,
	}
}
@article{saosabbas2003jastp,
  author = {Sao Sabbas, F T and Sentman, D D and Wescott, E M and Pinto Jr., O and Mendes Jr., O and Taylor, MJ},
  title = { Statistical analysis of space-time relationships between
		  sprites and lightning },
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {525--535},
  abstract = { We present a detailed statistical analysis of the
		  association of 40 sprite events with lightning from the
		  parent thunderstorm. Both temporal and spatial criteria
		  were used to identify the parent cloud-to-ground (CG)
		  lightning. Sprite images were GPS time stamped and their
		  locations triangulated. In contrast to previous reports of
		  nearly one-to-one association of sprites with positive
		  cloud-to-ground (+CG) lightning, 11 events (27\%) did not
		  have a +CG recorded by the National Lightning Detection
		  Network (NLDN), and 7 events (17\%) had neither NLDN nor
		  very low frequency (VLF) signatures associated with them. A
		  negative cloud-to-ground (-CG) preceded one of these events
		  by 9 ms. As expected for similar to16.7 ins integrated
		  images, none of the sprites without a +CG had any
		  discernible visual characteristic that would distinguish
		  them from }
}
@article{sato2003,
  author = {Sato, M and Fukunishi, H and Kikuchi, M and Yamagishi, H
		  and Lyons, W, A.},
  title = { Validation of sprite-inducing cloud-to-ground lightning
		  based on ELF observations at Syowa station in Antarctica },
  journal = {JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {607--614},
  abstract = { Waveform monitoring of ELF radio signals in the frequency
		  range of 1-400 Hz have been carried out on a routine basis
		  at Syowa station (69.0degreesS, 39.6degreesE in geographic
		  coordinates), Antarctica since February, 2000. The main
		  purpose of these observations is to monitor global
		  lightning activity and to locate lightning-induced sprites
		  and elves. The ELF observation system consisting of two
		  search coil sensors (geomagnetic north south (H) and cast
		  west (D) sensors) was installed at a remote unmanned
		  observatory in West Ongul Island located 5 km southwest
		  from Syowa station. As a back up system, the same system
		  was installed near Syowa station in East Ongul Island.
		  Signals from these sensors were digitally sampled at 1000
		  Hz with a GPS time code. On July 4, 2000 during the STEPS
		  (Severe Thunderstorm Electrification and Precipitation
		  Studies) 2000 campaign carried out over the Great Plains in
		  the US, 57 sprite events were observed from Yucca Ridge
		  Field Station (40.7deg! }
}
@article{sato2003b,
  author = {Sato, M. and Fukunishi, H.},
  title = {Global sprite occurrence locations and rates derived from triangulation of},
  journal = {Geophysical Research Letters},
  volume = {30},
  number = {16},
  year = {2003},
  pages = {ASC10--1-4},
  abstract = {
	We estimated locations and rates of sprite occurrences on a global scale
	}
}
@article{sato2005grl,
  author = {{Sato}, M. and {Fukunishi}, H.},
  title = {New evidence for a link between lightning activity and tropical upper cloud coverage},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = jun,
  volume = 32,
  pages = {12807-+},
  doi = {10.1029/2005GL022865},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3212807S&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{seliga1,
  author = {Seliga, T. A. and Sahr, J. D. and Holzworth, R. H.},
  title = {Probing electric fields near sprites and jets using
		  multiparameter radar and chaff},
  journal = {IGARSS '96. 1996 International Geoscience and Remote
		  Sensing Symposium. Remote Sensing for a Sustainable Future
		  Cat. No.96CH35875},
  volume = {1},
  year = {1},
  abstract = { The discovery of electric discharges above thunderstorms
		  has generated intense scientific interest. Studies of these
		  `sprites' and `jets' have focused on their characterization
		  by optical and radio techniques, with radar measurements of
		  the causative storms providing insight into related
		  weather. The authors describe a method for investigating
		  the electric field structure above thunderstorms using
		  ground-based radar to observe chaff dispersed by rockets.
		  Slender conducting or dielectric chaff will generally align
		  itself with the ambient electric field. This alignment is
		  readily detected by appropriate configurations of
		  polarimetric radar(s) such as are now used in meteorology
		  to observe the nature and motion of hydrometeors. This is
		  especially convenient as it permits the thunderstorms
		  associated with sprites and jets to be characterized with
		  the same experimental facility. This paper renders a
		  preliminary examination of factors such experiments would
		  entail and features that a multiparameter radar might
		  utilize to probe chaff dispersed by small rockets.
		  Monostatic and bistatic radar measurements of scatter from
		  chaff provide a powerful tool to study electric fields
		  associated with sprites and jets as well as other
		  atmospheric electric fields. }
}
@article{sentman1995pp,
  author = {Sentman, D. D. and Wescott, E. M.},
  title = {Red sprites and blue jets: thunderstorm-excited optical
		  emissions in the},
  journal = {Physics of Plasmas},
  volume = {1995},
  year = {1995},
  pages = {2514--22},
  abstract = { Low light level monochrome television observations
		  obtained from the ground }
}
@article{sentman2003jastp,
  author = {Sentman, D. D. and Wescott, E. M. and Picard, R. H. and Winick, J. R. and Stenbaek-Nielsen, H. C. and E.M Dewan and D.R. Moudry and F. T. Sao Sabbas and M.J. Heavner and J. Morrill},
  title = {Simultaneous observations of mesospheric gravity waves and
		  sprites generated by a {Midwestern} thunderstorm},
  journal = {J.\ Atmos.\ Sol.-Terr.\ Phys.},
  volume = 65,
  number = 5,
  year = 2003,
  pages = 537,
  abstract = { The present report investigates using simultaneous
		  observations of }
}
@article{sergeichev2002,
  author = {Sergeichev, KF and Sychev, IA},
  title = { Air breakdown caused by runaway electrons under
		  conditions of electron cyclotron resonance: An experimental
		  model of generation of gigantic high-altitude discharges },
  journal = {GEOMAGNETISM AND AERONOMY},
  volume = {42},
  number = {4},
  year = {2002},
  pages = {523--532},
  abstract = { The breakdown of rarefied air under conditions of
		  electron cyclotron resonance (ECR) at a frequency of 2.45
		  GHz in a mirror trap is analyzed in order to find a runaway
		  electron breakdown (REB) regime considered as a mechanism
		  for generating gigantic discharges in the stratosphere-red
		  sprites. It has been found that both usual and anomalous
		  ECR discharges are observed in the region where pressures
		  are lower than 10(-3) torr. The anomalous discharge has
		  thresholds that are higher by a factor of 4-5 and generates
		  an intense pulse-modulated gamma-emission, which is a
		  bremsstrahlung for electrons accelerated to subrelativistic
		  energies of 100-300 keV in relatively weak microwave fields
		  of 5-20 V/cm. The gamma-emission is accompanied by
		  cyclotron radiation at the second harmonics of the
		  microwave generator frequency, which indicates that
		  electrons with energies of about 10 keV are present in the
		  system. The front of the anomalous ECR discharge
		  considerably-by not less than 80 m! }
}
@article{sharma2003,
  author = {Sharma, D. K. and Rai, J. and Israil, M. and Subrahmanyam, P. and Chopra, P. and Garg, S. C.},
  title = {Effects of lightning on ionospheric temperature determined by {SROSS-C2} satellite},
  journal = {Indian Journal of Radio \& Space Physics},
  volume = {32},
  number = {2},
  year = {2003},
  pages = {93--7}
}
@article{singh2002,
  author = {Singh, R. P. and Patel, R. P. and Singh, A. K. and Das, I.
		  M. L.},
  title = {Lightning generated {ELF}, {VLF}, optical waves and their
		  diagnostic features},
  journal = {Indian Journal of Physics, Part B},
  volume = {76B},
  number = {3},
  year = {2002},
  pages = {235--49},
  abstract = { Recent observations of optical phenomena above an active
		  lightning discharge such as red sprites, blue jets, blue
		  starters and elves have refocused interest in this field
		  and its consequences. It is argued that during lightning
		  discharge ELF, VLF and optical emissions are generated.
		  Analyzing the recorded data it is clearly shown that
		  intense ELF generation from positive cloud to ground
		  lightning discharge is an indication of the presence of red
		  sprite. Daytime observation of red sprite is difficult and
		  hence ELF waves can work as an indicator. The diagnostic
		  features of ELF and VLF waves are also discussed and
		  interesting results based on the analysis of whistlers
		  recorded at Indian stations are presented. Recently,
		  association of VLF waves with earthquakes and red sprites
		  are reported. We have briefly summarized some results
		  related with these phenomena. }
}
@article{skamarock2003,
  author = {Skamarock, W. C. and Dye, J. E. and Defer, E. and Barth, M. C. and Stith, J. L. and Ridley, B. A. and Baumann, K.},
  title = {Observational- and modeling-based budget of lightning-produced NO/sub x/ in},
  journal = {Journal of Geophysical Research},
  volume = {108},
  number = {D10},
  year = {2003},
  pages = {ACH1--1-11},
  abstract = {
	NO/sub x/ transport and production by lightning for 10 July 1996
	}
}
@article{smirnova2000,
  author = {Smirnova, E. I. and Mareev, E. A.and Chugunov, Yu. V.},
  title = {Modeling of lightning generated electric field
		  transitional processes},
  journal = {Geophysical Research Letters},
  volume = {27},
  number = {23},
  year = {2000},
  pages = {3833--6},
  abstract = {
		  
		  }
}
@article{stanley2000,
  author = {Stanley, M. and Brook, M. and Krehbiel, P. and Cummer, S.A.},
  title = { Detection of daytime sprites via a unique sprite ELF
		  signature },
  journal = {GEOPHYSICAL RESEARCH LETTERS},
  volume = {27},
  number = {6},
  year = {2000},
  pages = {871--874},
  abstract = { On August 14, 1998, 3 separate daytime sprite events were
		  detected via a unique extremely low frequency (ELF) sprite
		  signature. The onset of the sprite ELF signatures was
		  delayed by 11.0-13.2 ms from positive cloud-to-ground
		  strokes which had attained exceptionally large charge
		  moment (charge times height) changes of 3900-6100 C.km. It
		  is shown that a charge moment change of 6100 C.km may have
		  been sufficient for conventional breakdown at similar or
		  equal to 54 km altitude, assuming an experimentally
		  measured ion: conductivity profile of Holzworth et al.,
		  [1985]. The daytime sprites themselves contained unusually
		  large charge moment changes of similar or equal to 2800
		  C.km, similar or equal to 1200 C.km, and similar or equal
		  to 910 C.km. }
}
@article{stark1996,
  author = {Stark, M. S. and Harrison, J. T. H. and Anastasi, C.},
  title = {Formation of nitrogen oxides by electrical discharges and implications for},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D3},
  year = {1996},
  pages = {6963--9},
  abstract = {
	The mechanism of production of nitrogen oxides by electrical discharges has
	}
}
@article{staudt2002,
  author = {Staudt, A. C. and Jacob, D. J. and Logan, J. A. and Bachiochi, D. and Krishnamurti, T.},
  title = {Global chemical model analysis of biomass burning and lightning influences},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {D14},
  year = {2002},
  pages = {ACH11--1-17},
  abstract = {
	A global three-dimensional model of tropospheric chemistry driven by
	}
}
@article{stenbaeknielsen2000,
  author = {Stenbaek Nielsen, H. C. and Moudry, D. R. and Wescott, E.
		  M. and Sentman, D. D. and Sao Sabbas, F. T.},
  title = {Sprites and possible mesospheric effects},
  journal = {Geophysical Research Letters},
  volume = {27},
  number = {23},
  year = {2000},
  pages = {3829--32},
  abstract = { Images of sprites have been recorded at 1 ms resolution
		  revealing several new sprite properties. Sprites appear to
		  occur in a highly structured mesosphere, and the authors
		  suggest that the cause of some of this structure is the
		  sprite activity itself. Evidence is seen in events where a
		  subsequent nearby sprite appears to re-activate the volume
		  of a previous sprite, in sprites where tendrils and
		  branches develop away from the normally observed vertical
		  direction, and in beads that lasts much longer that the
		  parent sprite. Sprites can be large with horizontal widths
		  of more than 40 km and can extend from the clouds up to the
		  lower ionosphere thus affecting a large volume of the
		  atmosphere. The total horizontal area of sprites during one
		  storm over Nebraska was a significant fraction of the area
		  covered by the associated thunderstorm raising the
		  possibility of larger scale measurable mesospheric effects.
		  }
}
@article{stith1999,
  author = {Stith, J. and Dye, J. and Ridley, B. and Laroche, P. and Defer, E. and Baumann, K. and Hubler, G. and Zerr, R. and Venticinique, M.},
  title = {NO signatures from lightning flashes},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {D13},
  year = {1999},
  pages = {16081--9},
  abstract = {
	In situ measurements of cloud properties, NO, and other trace gases were
	}
}
@article{su2002,
  author = {Han Tzong Su and Rue Ron Hsu and Chen, A. B. C. and Yi Jen
		  Lee and Lou Chuang Lee},
  title = {Observation of sprites over the Asian continent and over
		  oceans around Taiwan},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {4},
  year = {2002},
  pages = {3--1-4},
  abstract = { Sprites were observed over thunderstorms in the southern
		  China and in oceans around Taiwan. The observation sites
		  were on the Ali Mountain of Taiwan's Central Ridge area
		  with an altitude of 2413 m and in the campus of National
		  Cheng Kung University with an altitude of 50 m. For the
		  observed land sprites, 90\% of them were either carrots or
		  columniforms and 64\% of the sprites occurred in groups.
		  Among the observed oceanic sprites, 89\% of them were
		  carrots but only 22\% of the sprites occurred in groups. We
		  define a sprite active system as a thunderstorm that
		  continuously produces at least one sprite in a 10-minute
		  interval. The active sprites generating periods for the
		  observed thunderstorms were typically shorter than 30
		  minutes. The sprite production rates for these Asian
		  thunderstorms are estimated to be between I
		  approximately=2*10/sup -4/ events/km/sup 2//hr and I
		  approximately=1*10/sup -3/ events/km/sup 2//hr. }
}
@article{su2003,
  author = {Su, H. T. and Hsu, R. R. and Chen, A. B. and Wang, Y. C.
		  and Hsiao, W. S. and Lai, W. C. and Lee, L. C. and Sato, M.
		  and Fukunishi, H.},
  title = {Gigantic jets between a thundercloud and the ionosphere},
  journal = {Nature },
  volume = {423},
  number = {6943},
  year = {2003},
  pages = {974--6},
  abstract = { Transient luminous events in the atmosphere, such as
		  lighting-induced sprites and upwardly discharging blue
		  jets, were discovered recently in the region between
		  thunderclouds and the ionosphere. In the conventional
		  picture, the main components of Earth's global electric
		  circuit include thunderstorms, the conducting ionosphere,
		  the downward fair-weather currents and the conducting
		  Earth. Thunderstorms serve as one of the generators that
		  drive current upward from cloud tops to the ionosphere,
		  where the electric potential is hundreds of kilovolts
		  higher than Earth's surface. It has not been clear,
		  however, whether all the important components of the global
		  circuit have even been identified. Here we report
		  observations of five gigantic jets that establish a direct
		  link between a thundercloud (altitude ~ 16 km) and the
		  ionosphere at 90 km elevation. Extremely-low-frequency
		  radio waves in four events were detected, while no
		  cloud-to-ground lightning was observed to trigger these
		  events. Our result indicates that the
		  extremely-low-frequency waves were generated by negative
		  cloud-to-ionosphere discharges, which would reduce the
		  electrical potential between ionosphere and ground.
		  Therefore, the conventional picture of the global electric
		  circuit needs to be modified to include the contributions
		  of gigantic jets and possibly sprites. }
}
@article{sukhorukov1996,
  author = {Sukhorukov, A. I. and Mishin, E. V. and Stubbe, P. and
		  Rycroft, M. J.},
  title = {On blue jet dynamics},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {13},
  year = {1996},
  pages = {1625--8},
  abstract = { A model is proposed for blue jets [Sentman and Wescott,
		  1995 and Wescott et al., 1995], which explains their
		  dynamics, in particular the jet vertical velocity of about
		  100 km/s, the terminal altitudes of about 40-50 km, and the
		  competitive occurrence of blue jets and the recently
		  discovered blue starters [Wescott et al., 1995]. A blue jet
		  is considered to be formed by an attachment-controlled
		  ionizing wave, which moves upward via an electron avalanche
		  in the wavefront due to the mainly vertical, downward
		  directed quasi-electrostatic field, caused by the
		  extraordinarily large (>100 degrees C) charge transfer in a
		  high-altitude intracloud discharge or in a positive
		  cloud-to-ground discharge with a long continuing current. }
}
@article{sukhorukov1996grl,
  author = {{Sukhorukov}, A.~I. and {Rudenchik}, E.~A. and {Stubbe}, P.},
  title = {{Simulation of the strong lightning pulse penetration into the lower ionosphere}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 1996,
  volume = 23,
  pages = {2911-2914},
  doi = {10.1029/96GL02881},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1996GeoRL..23.2911S&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{sukhorukov1997,
  author = {Sukhorukov, A. I. and Stubbe, P.},
  title = {On ELF pulses from remote lightnings triggering sprites},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {13},
  year = {1997},
  pages = {1639--42},
  abstract = { ELF waveforms at large distances from strong CG
		  (cloud-to-ground) discharges are evaluated in the framework
		  of Greifinger's night-time propagation model. It is shown
		  that if the CG discharges triggering red sprites involve,
		  as now generally accepted, >/sub ~/10/sup 2/ C of charge
		  then they should generate remote ELF atmospherics with
		  considerably larger magnitudes than measured in the upper
		  ELF (>300 Hz) range. }
}
@article{sukhorukov1997grl,
  author = {{Sukhorukov}, A.~I. and {Stubbe}, P.},
  title = {{Excitation of the ionospheric Alfven resonator by strong lightning discharges}},
  journal = {Geophys.\ Res.\ Lett.},
  year = 1997,
  volume = 24,
  pages = {829-832},
  doi = {10.1029/97GL00807},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1997GeoRL..24..829S&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{sukhorukov1998jatp,
  author = {{Sukhorukov}, A.~I. and {Stubbe}, P.},
  title = {{Problems of blue jet theories}},
  journal = {J.\ Atmos.\ Terr.\ Phys.},
  year = 1998,
  month = may,
  volume = 60,
  pages = {725-732},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1998JATP...60..725S&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{surkov2005jgr,
  author = {{Surkov}, V.~V. and {Molchanov}, O.~A. and {Hayakawa}, M. and 
	{Fedorov}, E.~N.},
  title = {Excitation of the ionospheric resonance cavity by thunderstorms},
  journal = {J.\ Geophys.\ Res.},
  year = 2005,
  month = apr,
  volume = 110,
  number = {A9},
  pages = {4308-+},
  doi = {10.1029/2004JA010850},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005JGRA..11004308S&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{suszcynsky1999,
  author = {Suszcynsky, D. M. and Strabley, R. and Roussel Dupre, R. and
		  Symbalisty, E. M. D.},
  title = {Video and photometric observations of a sprite in
		  coincidence with a meteor},
  journal = {Journal of Geophysical Research},
  volume = {104},
  number = {D24},
  year = {1999},
  pages = {31361--7},
  abstract = { Video and photometric observations of a meteor-triggered
		  }
}
@conference{tonev2003,
  author = {Tonev, PT and Velinov, PIY},
  title = { Quasi-electrostatic fields in the near-earth space
		  produced by lightning and generation of runaway electrons
		  in ionosphere },
  booktitle = {ADVANCES IN SPACE RESEARCH},
  volume = {31},
  number = {5},
  year = {2003},
  pages = {6},
  abstract = { Strong quasi-electrostatic fields (QESF) are generated in
		  the ionosphere after positive lightning discharges by a
		  succeeding redistribution of the induced spatial charges.
		  These fields cause significant heating and modifications of
		  both electron density and electric conductivity in the
		  ionosphere. It is established that they also cause red
		  sprites. According to recent observations, studying of
		  initial period of QESF development is important for
		  understanding sprite onset mechanisms. In the present paper
		  QESF are modeled in these periods and the influence of
		  different conditions on their structure is analyzed. First
		  the structures of quasi-DC electric fields preceding a
		  lightning discharge are investigated. The dependence of
		  these structures on the magnetic field local orientation is
		  taken into account by considering two latitudinal cases,
		  corresponding to high and equatorial latitudes
		  respectively. This is done analytically for each case. Then
		  QESF are modeled which inten! }
}
@article{symbalisty2000,
  author = {Symbalisty, E. M. D. and Roussel Dupre, R. A. and ReVelle, D.
		  O. and Suszcynsky, D.},
  title = {Meteor trails and columniform sprites},
  journal = {Icarus },
  volume = {148},
  number = {1},
  year = {2000},
  pages = {65--79},
  abstract = {
		  
		  }
}
@article{symbalisty3,
  author = {Symbalisty, E. and Roussel Dupre, R. and Yukhimuk, V. and
		  Taranenko, Y.},
  title = {High altitude atmospheric discharges according to the
		  runaway air breakdown mechanism},
  journal = {XXIII International Conference on Phenomena in Ionized
		  Gases, ICPIG Proceedings. Contributed Papers},
  volume = {3},
  year = {3},
  abstract = { High altitude optical transients-red sprites, blue jets,
		  and elves-are modeled in the context of the relativistic
		  electron runaway air breakdown mechanism. These emissions
		  are usually with large mesoscale convective systems
		  (hereafter MCS). In thunderstorms cloud electrification
		  proceeds over time scale long enough to permit the
		  conducting atmosphere above the cloud to polarize and short
		  out the thunderstorm electric field. When a lightning
		  strike rapidly neutralizes a cloud charge layer runaway
		  driving fields can develop in the stratosphere and
		  mesosphere. According to the authors' simulations of the
		  full runaway process the variety of observed optical
		  emissions are due to the nature of the normal lightning
		  event in the MCS that kick starts the runaway avalanche.
		  The authors describe some details of the model, present the
		  results of the evolution of the primary electron
		  population, and summarize the initial conditions necessary
		  for different types of discharges. Two companion papers
		  present: (a) the predicted optical, gamma ray, and radio
		  emissions caused by these electrical discharges, and (b)
		  the time evolution of the secondary electron population and
		  its implications in terms of observables. }
}
@article{talbot2000,
  author = {Talbot, R. W. and Dibb, J. E. and Scheuer, E. M. and Bradshaw, J. D. and Sandholm, S.},
  title = {Tropospheric reactive odd nitrogen over the South Pacific in austral},
  journal = {Journal of Geophysical Research},
  volume = {105},
  number = {D5},
  year = {2000},
  pages = {6681--94},
  abstract = {
	The distribution of reactive nitrogen species over the South Pacific during
	}
}
@article{taranenko1996,
  author = {Taranenko, Y. and Roussel Dupre, R.},
  title = {High altitude discharges and gamma-ray flashes: a
		  manifestation of runaway air breakdown},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {5},
  year = {1996},
  pages = {571--4},
  abstract = { gamma -ray flashes of atmospheric origin as well as blue
		  jets and red sprites are naturally explained by
		  high-altitude discharges produced by runaway air breakdown.
		  The authors present the first detailed model of the
		  development of upward propagating discharges and compute
		  optical and gamma -ray emissions that are in excellent
		  agreement with observations. According to their theory,
		  such discharges represent the first known manifestation of
		  runaway air breakdown, a fundamental new process in plasma
		  physics. }
}
@article{taranenko3,
  author = {Taranenko, Y. and Roussel Dupre, R. and Yukhimuk, V. and
		  Symbalisty, E.},
  title = {Generation of elves by sprites and jets},
  journal = {XXIII International Conference on Phenomena in Ionized
		  Gases, ICPIG Proceedings. Contributed Papers},
  volume = {3},
  year = {3},
  abstract = { Recent years of observations of the upper atmosphere and
		  the lower ionosphere brought a fascinating collection of
		  new phenomena including optical, radio, and gamma-ray
		  emissions originating in the 20 to 90 km altitude range. Up
		  to now, the most diverse phenomenology has emerged from the
		  optical observations which have led to the identification
		  of red sprites, blue jets, blue starters and elves. Most of
		  the previous studies have concentrated on relating such
		  phenomena in the upper atmosphere to regular lightning
		  discharges in the troposphere. For example, sprites and
		  jets are believed to be optical manifestations of
		  electrical discharges in the upper atmosphere caused by
		  quasi-electrostatic fields penetrating to high altitudes
		  during a regular lightning discharge. The sprite/jet
		  discharge itself can be caused by the runaway air breakdown
		  or regular air breakdown. The standard theory for optical
		  airglow transients in the lower ionosphere above the
		  thunderstorms also known as elves suggests that they are
		  produced during interaction of electromagnetic pulses (EMP)
		  from lightning with the lower ionosphere. Heating of the
		  ambient electrons by the EMP in the D-region can result in
		  excitation of optical emissions once the optical excitation
		  thresholds are reached. In this paper the authors suggest
		  that in addition to this mechanism elves can be caused by
		  an EMP generated by sprites and jets. If sprites and jets
		  are indeed accompanied by electrical discharges then some
		  energy of their EMPs reaches to the ionosphere and heats
		  ambient electrons there that in turn stimulates optical
		  emissions similar to EMPs from regular lightning. }
}
@article{thomas2005grlb,
  author = {{Thomas}, J.~N. and {Holzworth}, R.~H. and {McCarthy}, M.~P. and 
	{Pinto}, O.},
  title = {Lightning sferics and stroke-delayed pulses measured in the stratosphere: Implications for mesospheric currents},
  journal = {Geophys.\ Res.\ Lett.},
  year = 2005,
  month = nov,
  volume = 32,
  pages = {22807-+},
  doi = {10.1029/2005GL024629},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005GeoRL..3222807T&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{thottappillil1997,
  author = {Thottappillil, R. and Rakov, V. A. and Uman, M. A.},
  title = {Distribution of charge along the lightning channel: relation to remote},
  journal = {Journal of Geophysical Research},
  volume = {102},
  number = {D6},
  year = {1997},
  pages = {6987--7006},
  abstract = {
	The authors derive exact expressions for remote electric and magnetic fields
	}
}
@article{tie2001jgr,
  author = {Xuexi Tie and Renyi Zhang and Brasseur, G. and Emmons, L. and Wenfang Lei},
  title = {Effects of lightning on reactive nitrogen and nitrogen reservoir species in},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {D3},
  year = {2001},
  pages = {3167--78},
  abstract = {
	The impact of lightning on tropospheric reactive nitrogen NO/sub x/
	}
}
@article{tierney2005jgr,
  author = {{Tierney}, H.~E. and {Roussel-Dupr{\'e}}, R.~A. and {Symbalisty}, E.~M.~D. and 
	{Beasley}, W.~H.},
  title = {Radio frequency emissions from a runaway electron avalanche model compared with intense, transient signals from thunderstorms},
  journal = {J.\ Geophys.\ Res.},
  year = 2005,
  month = jun,
  volume = 110,
  number = {D9},
  pages = {12109-+},
  doi = {10.1029/2004JD005381},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005JGRD..11012109T&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@conference{takahashi2000,
  author = {Takahashi, Y. and Fujito, M. and Watanabe, Y. and Fukunishi,
		  H. and Lyons, W.A.},
  title = {Temporal and spatial variations in the intensity ratio of
		  N-2 1st and 2nd positive bands in SPRITES },
  booktitle = {ADVANCES IN SPACE RESEARCH},
  volume = {26},
  number = {8},
  year = {2000},
  pages = {4},
  abstract = { In order to investigate the spatial and temporal
		  variations of sprites and elves and their spectral
		  structures, we have carried out photometric observations
		  during the SPRITES' 97 campaign using two multi-anode array
		  photometers (MAPs). Each MAP has 5 fields of view arrayed
		  in vertical and a time resolution of 52 ps, which enables
		  us to detect the rapid vertical motion of sprites/elves.
		  Since the emissions of sprites and elves mainly consist of
		  the Ist and 2nd positive bands of N-2, the intensity ratio
		  of these bands gives us information on the energy
		  distribution of electrons which excite N-2 molecules via
		  collision processes. Thus, one of the MAP instrument with
		  an optical sharp cut filter was used to measure only the
		  N-2 Ist positive band emissions in the wavelength range of
		  560 - 800 nm, while the other MAP without a filter was used
		  to measure both the N-2 Ist and 2nd positive band emissions
		  in the range 350 - 800 nm. Comparing the data from these
		  two MAPs, we estimat! }
}
@article{tong2005eps,
  author = {{Tong}, L. and {Nanbu}, K. and {Fukunishi}, H.},
  title = {{Numerical analysis of initiation of gigantic jets connecting thunderclouds to the ionosphers}},
  journal = {Earth, Planets, and Space},
  year = 2004,
  month = nov,
  volume = 56,
  pages = {1059-1065},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004EP%26S...56.1059T&db_key=AST},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{trakhtengerts2002,
  author = {Trakhtengerts, V. Y. and Iudin, D. I. and Kulchitsky, A. V. and Hayakawa, M.},
  title = {Kinetics of runaway electrons in a stochastic electric
		  field},
  journal = {Physics of Plasmas},
  volume = {9},
  number = {6},
  year = {2002},
  pages = {2762--6}
}
@article{trakhtengertz1997,
  author = {Trakhtengertz, V. Yu. and Mareev, E. A. and Sorokin, A. E.},
  title = {Electrodynamics of a convective cloud},
  journal = {Radiophysics and Quantum Electronics},
  volume = {40},
  number = {1--2},
  year = {1997},
  pages = {77--86}
}
@article{valdivia1997,
  author = {Valdivia, J. A. and Milikh, G. and Papadopoulos, K.},
  title = {Red sprites: lightning as a fractal antenna},
  journal = {Geophysical Research Letters},
  volume = {24},
  number = {24},
  year = {1997},
  pages = {3169--72},
  abstract = { A new and improved model of red sprites is presented.
		  Emphasis is placed in accounting for the puzzling
		  observation of the spatial structure in the red sprite's
		  optical emissions. The model relies upon a horizontal
		  fractal lightning discharge, which generates the EMPs that
		  excites the optical emissions in the lower ionosphere. It
		  is shown that the fractal model may account for the
		  observed sprite's spatially structured optical pattern,
		  while reducing the typical charge threshold to
		  approximately 100 C. }
}
@article{valdivia1998,
  author = {Valdivia, J. A. and Milikh, G. M. and Papadopoulos, K.},
  title = {Model of red sprites due to intracloud fractal lightning
		  discharges},
  journal = {Radio Science},
  volume = {33},
  number = {6},
  year = {1998},
  pages = {1655--68},
  abstract = { A new and improved model of red sprites is presented.
		  Emphasis is placed on }
}
@article{valdivia2003,
  author = {Valdivia, JA},
  title = { Lightning induced optical emissions in the ionosphere },
  journal = {SPACE SCIENCE REVIEWS},
  volume = {107},
  number = {1-2},
  year = {2003},
  pages = {273--291},
  abstract = { A discussion of lightning induced optical emissions in
		  the ionosphere is presented. Emphasis is placed on
		  accounting for the puzzling observation of the spatial
		  structure in the optical emissions and the Sprite 'seeding'
		  before the development of the 'tendrils' (or streamers). In
		  this context we discuss the generation of spatial
		  brightness variations, within the required lightning
		  parameter thresholds, due to spatio-temporal electric
		  fields and spatial neutral density perturbations. }
}
@article{wauben1998,
  author = {Wauben, W. M. F. and Fortuin, J. P. F. and van Velthoven, P. F. J. and Kelder, H. M.},
  title = {Comparison of modeled ozone distributions with sonde and satellite},
  journal = {Journal of Geophysical Research},
  volume = {103},
  number = {D3},
  year = {1998},
  pages = {3511--30},
  abstract = {
	The global distribution of ozone in the troposphere and lower stratosphere
	}
}
@article{wenyihu2002,
  author = {Wenyi Hu and Cummer, S. A. and Lyons, W. A. and Nelson, T.
		  E.},
  title = {Lightning charge moment changes for the initiation of
		  sprites},
  journal = {Geophysical Research Letters},
  volume = {29},
  number = {8},
  year = {2002},
  pages = {120--4},
  abstract = { The transient ELF (~50-5000 Hz) magnetic field radiated
		  by lightning }
}
@article{wescott1995,
  author = {Wescott, E. M. and Sentman, D. and Osborne, D. and Hampton, D. and
		  Heavner, M.},
  title = {Preliminary results from the Sprites94 aircraft campaign.
		  2. Blue jets},
  journal = {Geophysical Research Letters},
  volume = {22},
  number = {10},
  year = {1995},
  pages = {1209--12},
  abstract = { For pt.1 see ibid., vol.22, no.10, p.1205-8 (1995).
		  Initial observations of }
}
@article{wescott1996,
  author = {Wescott, E. M. and Sentman, D. D. and Heavner, M. J. and
		  Hallinan, T. J. and Hampton, D.},
  title = {The optical spectrum of aircraft St. Elmo's fire},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {25},
  year = {1996},
  pages = {3687--90},
  abstract = { On February 26, 1995, during a NASA sponsored mission to
		  Peru to study red }
}
@article{wescott1996b,
  author = {Wescott, E. M. and Sentman, D. D. and Heavner, M. J. and
		  Hampton, D. L. and Osborne, D.},
  title = {Blue starters: brief upward discharges from an intense
		  Arkansas thunderstorm},
  journal = {Geophysical Research Letters},
  volume = {23},
  number = {16},
  year = {1996},
  pages = {2153--6},
  abstract = { Documents the first observations of a new stratospheric
		  electrical }
}
@article{wescott1998jastp,
  author = {Wescott, E. M. and Sentman, D. D. and Heavner, M. J. and
		  Hampton, D. L. and Lyons, W.},
  title = {Observations of ''columniform'' sprites},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  year = {1998},
  pages = {733-740},
  abstract = { This paper reports observations of a distinctive form of
		  sprites associated }
}
@article{wescott1998jastpb,
  author = {Wescott, E. M. and Sentman, D. D. and Heavner, M. J. and
		  Hampton, D. L. and Vaughan, O.},
  title = {Blue jets: their relationship to lightning and very large
		  hailfall, and physical mechanisms for their production},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  year = {1998},
  pages = {713--724},
  abstract = { Blue jets are narrow cones of blue light that appear to
		  propagate upward }
}
@article{wescott2001jgrbb,
  author = {Wescott, E. M. and Stenbaek Nielsen, H. C. and Sentman, D.
		  D. and Heavner, M. J.},
  title = {Triangulation of sprites, associated halos and their
		  possible relation to},
  journal = {Journal of Geophysical Research},
  volume = {106},
  number = {A6},
  year = {2001},
  pages = {10467--77},
  abstract = { Sprite halos have been identified as an impulsive but
		  spatially diffuse }
}
@article{williams1998,
  author = {Williams, E. R.},
  title = {The positive charge reservoir for sprite-producing
		  lightning},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {7--9},
  year = {1998},
  pages = {689--92},
  abstract = { The close association of mesospheric sprites with
		  positive ground flashes has led to the frequent assumption
		  that positive charge is transferred from the top of a
		  thunderstorm with positive-over-negative charge structure,
		  from an altitude of 10 km or higher. Electrical and
		  meteorological observations are reviewed which support a
		  different picture: sprites are produced by laterally
		  extensive mesoscale convective systems (MCS) in which the
		  positive charge reservoir predominates in the 4-6 km ranges
		  of altitude. The behaviour of the surface electric field
		  during the End-of-Storm Oscillation and the behaviour of
		  the vertical electric field above MCS during positive
		  ground flashes both suggest a predominant in-cloud dipole
		  moment with opposite polarity to that of the ordinary
		  thundercloud. Lightning charge transfers of a few hundred
		  Coulombs from the 4-6 km height range may be required for
		  consistency with theories for sprite optical intensity and
		  to account for ELF Q-burst intensity. }
}
@article{williams2001,
  author = {Williams, E. R.},
  title = {Sprites, elves, and glow discharge tubes},
  journal = {Physics Today},
  volume = {54},
  number = {11},
  year = {2001},
  pages = {41--7},
  abstract = { The venerable field of gaseous electronics underlies the
		  understanding of a }
}
@article{winckler1995,
  author = {Winckler, J. R.},
  title = {Further observations of cloud-ionosphere electrical
		  discharges above thunderstorms},
  journal = {Journal of Geophysical Research},
  volume = {100},
  number = {D7},
  year = {1995},
  pages = {14335--45},
  abstract = { During the night of 9-10 August 1993 more than 150
		  luminous cloud-ionosphere discharges (CIs) were observed
		  above a thunderstorm complex moving SE across the state of
		  Iowa. Images of the CIs were obtained through clear air by
		  intensified CCD TV cameras at the O'Brien Observatory of
		  the University of Minnesota located about 60 km NE of
		  Minneapolis and 250-500 km from the storm center. The
		  discharges consisted of bright vertical striations
		  extending from 50-80 km altitude, often covering tens of
		  kilometers laterally, with tendrils of decreasing intensity
		  visible for the brighter events down to cloud tops below 20
		  km altitude. All the more intense CIs were coincident with
		  a VLF sferic in the 300 Hz-12 kHz range, but small events
		  often did not yield a detectable sferic. There is no
		  unambiguous evidence that CIs were sources of sferics. Some
		  of the CIs were observed to be coincident with a cloud
		  brightening and with a cloud-ground stroke recorded by the
		  National Lightning Detection Network. The duration of the
		  images was generally less than one TV field (<16.7 ms).
		  Many of these discharges have now been observed by the
		  space shuttle, by aircraft-borne TV cameras and a large
		  number by a ground-based camera observations in Colorado.
		  The present results are compared with these observations
		  and recent theoretical ideas related to the CI events are
		  discussed. It is proposed that CIs arise from intense
		  bursts of cloud electrification and may follow the
		  preexisting paths of cloud-to-ionosphere thunderstorm
		  currents. }
}
@article{winckler1996,
  author = {Winckler, J. R. and Lyons, W. A. and Nelson, T. E. and
		  Nemzek, R. J.},
  title = {New high-resolution ground-based studies of sprites},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D3},
  year = {1996},
  pages = {6997--7004},
  abstract = { New observations of sprites (cloud-ionosphere luminous
		  discharges above thunderstorms) were made from the Yucca
		  Ridge Field Station 20 km northeast of Fort Collins,
		  Colorado, on the night of July 11-12, 1994, as part of a
		  summer 1994 observing campaign. The sprites appeared above
		  a moderate mesoscale convective complex mostly over Kansas
		  at a range of about 270 km. The sprites were observed with
		  both wide-field and telescopic image-intensified CCD TV
		  cameras, a telescopic photometer system, and a 1- to 50-kHz
		  band VLF sferics receiver. This paper is based on five 1-s
		  data intervals containing bright sprites, smaller sprites,
		  and cloud and sky flashes. Telescopic TV images of bright
		  sprites had a fan-shaped upper plume with very fine
		  features not well resolved by the TV, but dendritic (upward
		  forked) and vertically striated forms adjacent to these
		  plumes and bright points of luminosity around the
		  plume-shaped regions. Many sprites consisted entirely of
		  groups of vertically aligned striations which sometimes
		  appeared to diverge from a common point of origin at cloud
		  tops. All sprites in the present data sample were preceded
		  by a cloud to ground (CG) stroke with a coincident sferic
		  and sky flash. All CG strokes associated with sprites were
		  positive, and most were 100 kA or more inferred peak
		  current. From the photometer, the duration of the
		  CG-induced sky flashes was about 3 ms and the additional
		  sprite total light curve was also about 3 ms. The puzzling
		  feature that the total duration of TV images of sprites was
		  often longer than the photometric values is discussed and
		  an explanation given. The sprites were attributed to strong
		  negative charging, following the positive CG stroke, of a
		  localized cloud top region which produced an intense
		  electric field and a luminous discharge in the
		  cloud-ionosphere region. The concept of }
}
@article{winckler1998,
  author = {Winckler, J. R.},
  title = {Optical and VLF radio observations of sprites over a
		  frontal storm viewed from O'Brien Observatory of the
		  University of Minnesota},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {60},
  number = {7--9},
  year = {1998},
  pages = {679--88},
  abstract = { Video images, and photometric and VLF data, were obtained
		  by the University of Minnesota SKYFLASH system of 38
		  `sprite' events associated with a strong frontal system
		  located in the upper midwest, U.S.A., on 20-21 June 1996.
		  Besides two image-intensified TV cameras, the SKYFLASH
		  system included telescopic photometers sensitive to
		  Rayleigh scattered lightning flashes by viewing the zenith
		  over the station (O'Brien Observatory, University of
		  Minnesota, about 40 km NE of Minneapolis-St Paul) and also
		  several VLF channels with 300 Hz to 10 kHz bandwidth for
		  recording the electromagnetic `sferics'. The sprites
		  covered a wide range of sizes, from small kilometer-size
		  filaments to huge luminous objects 50-60 km in lateral
		  dimension. All the sprites appeared to consist of bundles
		  of filaments, and always followed-within several ms-a
		  `trigger' could-ground discharge which, in 35 of the 38
		  events, was positive. It is difficult to find physical
		  mechanisms that explain this positive stroke preference.
		  The larger events reached from 80 km almost to cloud tops,
		  but the small events were localized near 60 km altitude,
		  which is the `bright' region of sprite luminosity, a fact
		  also not well explained theoretically. The filamentary
		  structure of sprites also presents challenges to explain.
		  Of about a dozen lightning storms observed with SKYFLASH in
		  the period from 1993 to 1996 in the upper midwest, only two
		  had an appreciable number of sprites. }
}
@article{winterrath1999,
  author = {Winterrath, T. and Kurosu, T. P. and Richter, A. and Burrows, J. P.},
  title = {Enhanced O/sub 3/ and NO/sub 2/ in thunderstorm clouds: convection or},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {9},
  year = {1999},
  pages = {1291--4},
  abstract = {
	Ground based zenith sky measurements of O/sub 3/ and NO/sub 2/ slant optical
	}
}
@article{yair2003,
  author = {Yair, Y. and Price, C. and Levin, Z. and Joseph, J. and
		  Israelevitch, P. and Devir, A.},
  title = {Sprite observations from the Space Shuttle during the
		  Mediterranean Israeli},
  journal = {Journal of Atmospheric and Solar Terrestrial Physics},
  volume = {65},
  number = {5},
  year = {2003},
  pages = {635},
  abstract = {
		  
		  }
}
@article{yatsevich2005rqe,
  author = {{Yatsevich}, E.~I. and {Shvets}, A.~V. and {Rabinowich}, L.~M. and 
	{Nickolaenko}, A.~P. and {Belyaev}, G.~G. and {Schekotov}, A.~Y.},
  title = {Results of Comparing Schumann-Resonance Observations with the Model of a Single Global Thunderstorm Center},
  journal = {Radiophysics and Quantum Electronics},
  year = 2005,
  month = apr,
  volume = 48,
  pages = {254-267},
  doi = {10.1007/s11141-005-0066-x},
  adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005R%26QE...48..254Y&db_key=PHY},
  adsnote = {Provided by the Smithsonian/NASA Astrophysics Data System}
}
@article{yukhimuk1999,
  author = {Yukhimuk, V. and Roussel Dupre, R. A. and Symbalisty, E.
		  M. D.},
  title = {On the temporal evolution of red sprites: runaway theory
		  versus data},
  journal = {Geophysical Research Letters},
  volume = {26},
  number = {6},
  year = {1999},
  pages = {679--82},
  abstract = { The results of numerical simulations of red sprite
		  discharges, namely the temporal evolutions of optical
		  emissions, are presented and compared with observations.
		  The simulations are done using the recently recalculated
		  runaway avalanche rates. The temporal evolution of these
		  simulations is in good agreement with ground-based
		  photometer and CCD TV camera observations of red sprites.
		  The authors' model naturally explains the }
}
@article{yukhimuk3,
  author = {Yukhimuk, V. and Roussel Dupre, R. and Symbalisty, E. and
		  Taranenko, Y.},
  title = {Optical, radio and X-ray radiation of red sprites produced
		  by runaway air breakdown},
  journal = {XXIII International Conference on Phenomena in Ionized
		  Gases, ICPIG Proceedings. Contributed Papers},
  volume = {3},
  year = {3},
  pages = {},
  abstract = { We use the runaway air breakdown model of upward
		  discharges to calculate optical, radio, and X-ray radiation
		  generated by red sprites. }
}
@article{zabotin2001,
  author = {Zabotin, N.A. and Wright, J.W.},
  title = { Role of meteoric dust in sprite formation},
  journal = {GEOPHYSICAL RESEARCH LETTERS},
  volume = {28},
  number = {13},
  year = {2001},
  pages = {2593--2596},
  abstract = {We show that ubiquitous small conducting particles of
		  meteoric origin in the mesosphere and stratosphere may
		  explain some features of sprite occurrence and fine
		  structure. The main processes involved are: electrostatic
		  field amplification by microspires on the dust surface}
}
@article{zahn2002,
  author = {Zahn, A. and Brenninkmeijer, C. A. M. and Crutzen, P. J. and Parrish, D. D. and Sueper, D. and Heinrich, G. and Gusten, H. and Fischer, H. and Hermann, M. and Heintzenberg,-J.},
  title = {Electrical discharge source for tropospheric "ozone-rich transients"},
  journal = {Journal of Geophysical Research},
  volume = {107},
  number = {D22},
  year = {2002},
  pages = {ACH16--1-9},
  abstract = {
	In situ trace gas (O/sub 3/, NO, NO/sub 2/, NO/sub y/) and ultrafine aerosol
	}
}
@article{zhang2000,
  author = {Zhang, R. and Sanger, N. T. and Orville, R. E. and Xuexi Tie and Randel, W. and Williams, E. R.},
  title = {Enhanced NO/sub x/ by lightning in the upper troposphere and lower},
  journal = {Geophysical Research Letters},
  volume = {27},
  number = {5},
  year = {2000},
  pages = {685--8},
  abstract = {
	This paper reveals a possible connection between lightning activity and the
	}
}
@article{zheng1996,
  author = {Zheng, J. and Weinheimer, A. J. and Ridley, B. A. and Liu, S. C. and Sachse, G. W. and},
  title = {Analysis of small- and large-scale increases of reactive nitrogen observed},
  journal = {Journal of Geophysical Research},
  volume = {101},
  number = {D22},
  year = {1996},
  pages = {28805--16},
  abstract = {
	An analysis of the data obtained during AASE II was made to characterize
	}
}

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