Positions

Research Areas research areas

Overview

  • Interests include lightning physics and effects, the radiation environment of thunderstorms, terrestrial gamma-ray flashes (TGFs), x-rays from lightning and other topics in Atmospheric and Space Electricity and High Energy Atmospheric Physics.
  • Publications

    Academic Article

    Year Title
    2019 Fast negative breakdown in thunderstorms.Nature Communications.  10:1648. 2019
    2019 VHF and UHF Electromagnetic Radiation Produced by Streamers in LightningGeophysical Research Letters.  46:443-451. 2019
    2018 Evaluation of Monte Carlo tools for high-energy atmospheric physics II: relativistic runaway electron avalanchesGeoscientific Model Development.  11:4515-4535. 2018
    2018 Characterizing Upward Lightning With and Without a Terrestrial Gamma Ray FlashJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  123:11321-11332. 2018
    2018 Characteristics of Radio Emissions Associated With Terrestrial Gamma-Ray FlashesJournal of Geophysical Research.  123:5933-5948. 2018
    2018 A Terrestrial Gamma-Ray Flash inside the Eyewall of Hurricane PatriciaJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  123:4977-4987. 2018
    2017 Energy Distribution of X-rays Produced by Meter-Long Negative Discharges in AirATMOSPHERE.  8:244-244. 2017
    2017 Gamma Ray Signatures of Neutrons From a Terrestrial Gamma Ray FlashGeophysical Research Letters.  44:10063-10070. 2017
    2017 Three-Dimensional Modeling of Two Interacting StreamersJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  122:10189-10196. 2017
    2017 Elves Accompanying Terrestrial Gamma Ray FlashesJournal of Geophysical Research.  122:10563-10576. 2017
    2017 On production of gamma rays and relativistic runaway electron avalanches from Martian dust stormsGeophysical Research Letters.  44:8182-8187. 2017
    2017 Do cosmic ray air showers initiate lightning?: A statistical analysis of cosmic ray air showers and lightning mapping array dataJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  122:8173-8186. 2017
    2017 Characterizing the source properties of terrestrial gamma ray flashesJournal of Geophysical Research.  122:8915-8932. 2017
    2017 The impact on the ozone layer from NOx produced by terrestrial gamma ray flashesGeophysical Research Letters.  44:5240-5245. 2017
    2017 A simulation study on the electric field spectral dependence of thunderstorm ground enhancements and gamma ray glowsJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  122:4763-4772. 2017
    2017 X-rays from negative laboratory sparks in air: Influence of the anode geometryJournal of Atmospheric and Solar-Terrestrial Physics Journal of Atmospheric and Terrestrial Physics.  154:190-194. 2017
    2016 Magnetic fieldmodification to the relativistic runaway electron avalanche lengthJournal of Geophysical Research.  121:11261-11270. 2016
    2016 The spectroscopy of individual terrestrial gamma-ray flashes: Constraining the source propertiesJournal of Geophysical Research.  121:11346-11363. 2016
    2016 The rarity of terrestrial gamma-ray flashes: 2. RHESSI stacking analysisJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  121:11382-11404. 2016
    2016 An investigation of the possibility of detecting gamma-ray flashes originating from the atmosphere of VenusJournal of Geophysical Research.  121:9020-9029. 2016
    2016 Ground-level observation of a terrestrial gamma ray flash initiated by a triggered lightningJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  121:6511-6533. 2016
    2015 A terrestrial gamma-ray flash recorded at the Lightning Observatory in Gainesville, FloridaJournal of Atmospheric and Solar-Terrestrial Physics Journal of Atmospheric and Terrestrial Physics.  136:86-93. 2015
    2015 The energy spectrum of X-rays from rocket-triggered lightningJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  120:10951-10963. 2015
    2015 Lightning leader altitude progression in terrestrial gamma-ray flashesGeophysical Research Letters.  42:7792-7798. 2015
    2015 Relativistic electron avalanches as a thunderstorm discharge competing with lightning.Nature Communications.  6:7845. 2015
    2015 Positron clouds within thunderstormsJournal of Plasma Physics.  81:475810405. 2015
    2015 First images of thunder: Acoustic imaging of triggered lightningGeophysical Research Letters.  42:6051-6057. 2015
    2015 Sprite streamer initiation from natural mesospheric structures.Nature Communications.  6:7540. 2015
    2015 Streamer formation and branching from model hydrometeors in subbreakdown conditions inside thundercloudsJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  120:3660-3678. 2015
    2015 A study of thunderstorm microphysical properties and lightning flash counts associated with terrestrial gamma-ray flashesJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  120:3453-3464. 2015
    2015 Upward electrical discharges observed above Tropical Depression Dorian.Nature Communications.  6:5995. 2015
    2015 The effect of direct electron-positron pair production on relativistic feedback ratesJournal of Geophysical Research.  120:800-806. 2015
    2014 The source altitude, electric current, and intrinsic brightness of terrestrial gamma ray flashesGeophysical Research Letters.  41:8586-8593. 2014
    2014 An analytical approach for calculating energy spectra of relativistic runaway electron avalanches in airJournal of Geophysical Research.  119:7794-7823. 2014
    2014 Pulse properties of terrestrial gamma-ray flashes detected by the Fermi Gamma-Ray Burst MonitorJournal of Geophysical Research.  119:5931-5942. 2014
    2014 The physics of lightningPhysics Reports.  534:147-241. 2014
    2014 The structure of X-ray emissions from triggered lightning leaders measured by a pinhole-type X-ray cameraJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  119:982-1002. 2014
    2014 Numerical simulations of compact intracloud discharges as the Relativistic Runaway Electron Avalanche-Extensive Air Shower processJournal of Geophysical Research.  119:479-489. 2014
    2013 Numerical analysis of 2010 high-mountain (Tien-Shan) experiment on observations of thunderstorm-related low-energy neutron emissionsJournal of Geophysical Research.  118:7905-7912. 2013
    2013 The angular distribution of energetic electron and X-ray emissions from triggered lightning leadersJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES.  118:11712-11726. 2013
    2013 Properties of the thundercloud discharges responsible for terrestrial gamma-ray flashesGeophysical Research Letters.  40:4067-4073. 2013
    2013 Radio emissions from terrestrial gamma-ray flashesJournal of Geophysical Research.  118:3769-3790. 2013
    2013 Analysis of the experiment on registration of X-rays from the stepped leader of a cloud-to-ground lightning dischargeJournal of Geophysical Research.  118:2573-2582. 2013
    2013 Modeling terrestrial gamma ray flashes produced by relativistic feedback dischargesJournal of Geophysical Research.  118:2359-2376. 2013
    2013 Radio signals from electron beams in terrestrial gamma ray flashesJournal of Geophysical Research.  118:2313-2320. 2013
    2012 High-Energy Atmospheric Physics: Terrestrial Gamma-Ray Flashes and Related PhenomenaSpace Science Reviews.  173:133-196. 2012
    2012 Observation of a gamma-ray flash at ground level in association with a cloud-to-ground lightning return strokeJournal of Geophysical Research.  117:n/a-n/a. 2012
    2012 Numerical simulations of local thundercloud field enhancements caused by runaway avalanches seeded by cosmic rays and their role in lightning initiationJournal of Geophysical Research.  117:n/a-n/a. 2012
    2012 A study of X-ray emissions from thunderstorms with emphasis on subsequent strokes in natural lightningJournal of Geophysical Research.  117:n/a-n/a. 2012
    2012 Spatial and energy distributions of X-ray emissions from leaders in natural and rocket triggered lightningJournal of Geophysical Research.  117:n/a-n/a. 2012
    2012 Deadly rays from clouds.Scientific American.  307:54-59. 2012
    2012 Formation of streamer discharges from an isolated ionization column at subbreakdown conditions.Physical Review Letters.  109:025002. 2012
    2012 Effects of pressure and humidity on positive corona inception from thundercloud hydrometeorsJournal of Atmospheric and Solar-Terrestrial Physics Journal of Atmospheric and Terrestrial Physics.  80:179-186. 2012
    2012 Reply to comment by A. V. Gurevich et al. on "Low-energy electron production by relativistic runaway electron avalanches in air"Journal of Geophysical Research.  117:n/a-n/a. 2012
    2012 "Chaotic" dart leaders in triggered lightning: Electric fields, X-rays, and source locationsJournal of Geophysical Research.  117:n/a-n/a. 2012
    2012 The relativistic feedback discharge model of terrestrial gamma ray flashesJournal of Geophysical Research.  117:n/a-n/a. 2012
    2011 A terrestrial gamma ray flash observed from an aircraftJournal of Geophysical Research.  116. 2011
    2011 High-speed X-ray images of triggered lightning dart leadersJournal of Geophysical Research.  116. 2011
    2011 Low-energy electron production by relativistic runaway electron avalanches in airJournal of Geophysical Research.  116:n/a-n/a. 2011
    2011 Comment on "Runaway breakdown and electrical discharges in thunderstorms" by Gennady Milikh and Robert Roussel-DupreJournal of Geophysical Research.  116:n/a-n/a. 2011
    2011 The lightning-TGF relationship on microsecond timescalesGeophysical Research Letters.  38:n/a-n/a. 2011
    2011 The rarity of terrestrial gamma-ray flashesGeophysical Research Letters.  38:n/a-n/a. 2011
    2011 Electron-positron beams from terrestrial lightning observed with Fermi GBMGeophysical Research Letters.  38:n/a-n/a. 2011
    2010 Associations between Fermi Gamma-ray Burst Monitor terrestrial gamma ray flashes and sferics from the World Wide Lightning Location NetworkJournal of Geophysical Research.  115:n/a-n/a. 2010
    2010 Terrestrial gamma ray flashes correlated to storm phase and tropopause heightJournal of Geophysical Research.  115:n/a-n/a. 2010
    2010 First results on terrestrial gamma ray flashes from the Fermi Gamma-ray Burst MonitorJournal of Geophysical Research.  115. 2010
    2010 Thunderstorm characteristics associated with RHESSI identified terrestrial gamma ray flashesJournal of Geophysical Research.  115:n/a-n/a. 2010
    2010 Comment on "'Seed' electrons from muon decay for runaway mechanism in the terrestrial gamma ray flash production," by Gerson S. Paiva, Antonio C. Pavao, and Cristiano C. BastosJournal of Geophysical Research.  115. 2010
    2010 Estimation of the fluence of high-energy electron bursts produced by thunderclouds and the resulting radiation doses received in aircraftJournal of Geophysical Research.  115. 2010
    2010 Diffusion of relativistic runaway electrons and implications for lightning initiationJournal of Geophysical Research.  115:n/a-n/a. 2010
    2010 The first electric field pulse of cloud and cloud-to-ground lightning dischargesJournal of Atmospheric and Solar-Terrestrial Physics Journal of Atmospheric and Terrestrial Physics.  72:143-150. 2010
    2009 Remote measurements of thundercloud electrostatic fieldsJournal of Geophysical Research.  114. 2009
    2009 COMPOSITION AND SPECTRAL PROPERTIES OF THE 1 AU QUIET-TIME SUPRATHERMAL ION POPULATION DURING SOLAR CYCLE 23Astrophysical Journal.  693:1588-1600. 2009
    2009 Spectral dependence of terrestrial gamma-ray flashes on source distanceGeophysical Research Letters.  36. 2009
    2008 A study of X-ray emission from laboratory sparks in air at atmospheric pressureJournal of Geophysical Research.  113. 2008
    2008 The spatial distribution of upstream ion events from the Earth's bow shock measured by ACE, Wind, and STEREOJournal of Geophysical Research.  113:n/a-n/a. 2008
    2008 Co-location of lightning leader x-ray and electric field change sourcesGeophysical Research Letters.  35. 2008
    2008 Source mechanisms of terrestrial gamma-ray flashesJournal of Geophysical Research.  113. 2008
    2008 Abundances and energy spectra of corotating interaction region heavy ions observed during solar cycle 23Astrophysical Journal.  678:1458-1470. 2008
    2008 Time evolution of terrestrial gamma ray flashesGeophysical Research Letters.  35. 2008
    2008 High-energy electron beams launched into space by thunderstormsGeophysical Research Letters.  35. 2008
    2007 Evidence for a two-stage acceleration process in large solar energetic particle eventsSpace Science Reviews.  130:243-253. 2007
    2007 Relativistic breakdown in planetary atmospheresPhysics of Plasmas.  14:042901-042901. 2007
    2006 Runaway breakdown in the Jovian atmospheresGeophysical Research Letters.  33. 2006
    2006 Heavy-ion elemental abundances in large solar energetic particle events and their implications for the seed populationAstrophysical Journal.  649:470-489. 2006
    2006 Origin of heavy ions in upstream events near the Earth's bow shockGeophysical Research Letters.  33:n/a-n/a. 2006
    2006 The role of interplanetary scattering in western hemisphere large solar energetic particle eventsAstrophysical Journal.  647:L65-L68. 2006
    2006 Effect of adiabatic cooling on the fitted parallel mean free path of solar energetic particlesJournal of Geophysical Research.  111. 2006
    2006 Solar cycle variations in the composition of the suprathermal heavy-ion population near 1 AUAstrophysical Journal.  645:L81-L84. 2006
    2006 Propagation speed of runaway electron avalanchesGeophysical Research Letters.  33. 2006
    2006 The seed population for energetic particles accelerated by CME-driven shocksSpace Science Reviews.  124:261-275. 2006
    2005 A comparison between Monte Carlo simulations of runaway breakdown and terrestrial gamma-ray flash observationsGeophysical Research Letters.  32:n/a-n/a. 2005
    2005 The initiation of lightning by runaway air breakdownGeophysical Research Letters.  32. 2005
    2005 X-ray bursts produced by laboratory sparks in airGeophysical Research Letters.  32. 2005
    2005 The model dependence of solar energetic particle mean free paths under weak scatteringAstrophysical Journal.  627:562-566. 2005
    2005 A bolt out of the blue.Scientific American.  292:64-71. 2005
    2005 X-ray bursts associated with leader steps in cloud-to-ground lightningGeophysical Research Letters.  32. 2005
    2004 Spectral properties of heavy ions associated with the passage of interplanetary shocks at 1 AUAstrophysical Journal.  611:1156-1174. 2004
    2004 Interplanetary transport mechanisms of solar energetic particlesAstrophysical Journal.  609:1076-1081. 2004
    2004 Implications of x-ray emission from lightningGeophysical Research Letters.  31:n/a-n/a. 2004
    2004 Abundances of heavy and ultraheavy ions in He-3-rich solar flaresAstrophysical Journal.  606:555-564. 2004
    2004 A ground level gamma-ray burst observed in association with rocket-triggered lightningGeophysical Research Letters.  31:n/a-n/a. 2004
    2004 Measurements of x-ray emission from rocket-triggered lightningGeophysical Research Letters.  31:n/a-n/a. 2004
    2003 A fundamental limit on electric fields in airGeophysical Research Letters.  30:n/a-n/a. 2003
    2003 Elemental fractionation in small solar energetic particle eventsAstrophysical Journal.  594:592-604. 2003
    2003 Evidence for a suprathermal seed population of heavy ions accelerated by interplanetary shocks near 1 AUAstrophysical Journal.  588:1149-1162. 2003
    2003 Energetic radiation produced during rocket-triggered lightning.Science The Scientific monthly.  299:694-697. 2003
    2002 Wind and ACE observations during the great flow of 1-4 May 1998: Relation to solar activity and implications for the magnetosphereJournal of Geophysical Research.  107:ssh 3-1-ssh 3-21. 2002
    2002 Spectral properties of He and heavy ions in He-3-rich solar flaresAstrophysical Journal.  574:1039-1058. 2002
    2002 A new heavy ion abundance enrichment pattern in He-3-rich solar particle eventsAstrophysical Journal.  565:L51-L54. 2002
    2001 Isotopic composition of solar energetic particle events measured by Advanced Composition Explorer/ULEISAstrophysical Journal.  563:403-409. 2001
    2001 ACE observations of the Bastille Day 2000 interplanetary disturbancesSolar Physics.  204:229-254. 2001
    2001 Acceleration of He-3 nuclei at interplanetary shocksAstrophysical Journal.  553:L89-L92. 2001
    2001 Energetic electrons in He-3-enhanced solar energetic particle eventsAstrophysical Journal.  552:863-870. 2001
    2000 New properties of He-3- rich solar flares deduced from low-energy particle spectraAstrophysical Journal.  545:L157-L160. 2000
    2000 Interplanetary Magnetic Field Line Mixing Deduced from Impulsive Solar Flare Particles.Astrophysical Journal.  532:L79-L82. 2000
    2000 Characteristics of energetic (greater than or similar to 30 keV/nucleon) ions observed by the Wind/STEP instrument upstream of the Earth's bow shockJournal of Geophysical Research.  105:61-78. 2000
    2000 The spatial size of ion events measured fair upstream of the earth's bow shock by ACE/ULEIS and WIND/STEPGeophysical Research Letters.  27:65-68. 2000
    1999 3He Enhancements in Large Solar Energetic Particle Events.Astrophysical Journal.  525:L133-L136. 1999
    1999 Evidence for acceleration of ions to similar to 1 MeV by adiabatic-like reflection at the quasi-perpendicular Earth's bow shockGeophysical Research Letters.  26:2925-2928. 1999
    1999 Particle acceleration and sources in the November 1997 solar energetic particle eventsGeophysical Research Letters.  26:141-144. 1999
    1999 Simultaneous observations of energetic (similar to 150 keV) protons upstream of the Earth's bow shock at ACE and WINDGeophysical Research Letters.  26:169-172. 1999
    1999 Origin, injection, and acceleration of CIR particles: Observations - Report of Working Group 6Space Science Reviews.  89:327-367. 1999
    1998 Solar energetic particles inside magnetic clouds observed with the Wind spacecraftGeophysical Research Letters.  25:2521-2524. 1998
    1998 The Ultra-Low-Energy Isotope Spectrometer (ULEIS) for the ACE spacecraftSpace Science Reviews.  86:409-448. 1998
    1997 Perpendicular transport of low-energy corotating interaction region-associated nucleiAstrophysical Journal.  490:L115-L118. 1997
    1997 Late-phase acceleration of energetic ions in corotating interaction regionsGeophysical Research Letters.  24:2917-2920. 1997
    1997 New spectral and abundance features of interplanetary heavy ions in corotating interaction regionsAstrophysical Journal.  486:L149-L152. 1997
    1997 Energy spectra of ions accelerated in impulsive and gradual solar eventsAstrophysical Journal.  483:515-522. 1997
    1997 Acceleration of solar flare He-3 at the Earth's bow shockGeophysical Research Letters.  24:61-64. 1997
    High-energy radiation from thunderstorms and lightning with LOFT
    Production of X-rays in air gaps stressed by switching impulse voltagesInternational Conference on Lightning Protection, ICLP2016

    Conference Proceeding

    Year Title
    2014 Charge Motion and Altitude of Terrestrial Gamma-Ray Flashes2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS). 2014
    2014 POET: a SMEX mission for gamma-ray burst polarimetryProceedings of SPIE - The International Society for Optical Engineering. 91440O-91440O. 2014
    2014 Recent Advances in High Energy Atmospheric Physics2014 INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION (ICLP). 2035-2041. 2014
    2013 A Numerical Study on TGFs and Relativistic Feedback Discharges2013 US NATIONAL COMMITTEE OF URSI NATIONAL RADIO SCIENCE MEETING (USNC-URSI NRSM). 2013
    2009 Lightning Physics and The Study of Climate Change and SustainabilityAIP Conference Proceedings. 26-31. 2009
    2008 Abundances and energy spectra of corotating interaction region heavy ionsAIP Conference Proceedings. 101-+. 2008
    2008 Seed Populations for large solar particle events of cycle 23AIP Conference Proceedings. 124-+. 2008
    2005 Energetic particles accelerated by shocks in the heliosphere: What is the source material?AIP Conference Proceedings. 219-226. 2005
    2005 The time variation of energetic He-3 in interplanetary space from 1997 to 2005Proceedings of the 29th International Cosmic Ray Conference Vol 1: SH1 and SH2. 117-120. 2005
    2003 Composition variations during large solar energetic particle eventsAIP Conference Proceedings. 624-627. 2003
    2003 How common is energetic He-3 in the inner heliosphere?AIP Conference Proceedings. 652-655. 2003
    2001 Long-term fluences of energetic particles in the heliosphereAIP Conference Proceedings. 165-170. 2001
    2001 Propagation of impulsive solar energetic particle eventsAIP Conference Proceedings. 353-354. 2001
    2000 Heavy ions in He-3 enhanced solar energetic particle eventsAIP Conference Proceedings. 99-102. 2000
    2000 Survey of ionic charge states of solar energetic particle events during the first year of ACEAIP Conference Proceedings. 131-134. 2000
    2000 The mixing of interplanetary magnetic field lines: A significant transport effect in studies of the energy spectra of impulsive flaresAIP Conference Proceedings. 47-54. 2000

    Teaching Activities

  • Doctoral Research Taught course 2019
  • Doctoral Research Taught course 2018
  • Freshman Seminar Taught course 2018
  • Introduction to Physics I Taught course 2018
  • Introduction to Physics I Taught course 2018
  • Doctoral Research Taught course 2018
  • Doctoral Research Taught course 2017
  • Freshman Seminar Taught course 2017
  • Introduction to Physics I Taught course 2017
  • Introduction to Physics I Taught course 2017
  • Doctoral Research Taught course 2017
  • General Physics I Recitation Taught course 2017
  • Doctoral Research Taught course 2016
  • Introduction to Physics I Taught course 2016
  • Introduction to Physics I Taught course 2016
  • Doctoral Research Taught course 2016
  • Mechanics/Mathematical Phys I Taught course 2016
  • Mechanics/Mathematical Phys I Taught course 2016
  • Doctoral Research Taught course 2015
  • General Physics II Recitation Taught course 2015
  • Thermodynamics&Statistic Mech Taught course 2015
  • Doctoral Research Taught course 2015
  • Intro to Modern Astronomy Taught course 2015
  • Education And Training

  • B.S. Mathematics, University of California
  • B.S. Physics, University of California
  • M.S. Physics, University of Chicago
  • Ph.D. Physics, University of Chicago
  • Full Name

  • Joseph Dwyer