Lightning-Induced Electron Precipitation Events Observed at Low Altitudes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F25%3A00618642" target="_blank" >RIV/68378289:_____/25:00618642 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10501543

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JA033639" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JA033639</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024JA033639" target="_blank" >10.1029/2024JA033639</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lightning-Induced Electron Precipitation Events Observed at Low Altitudes

Popis výsledku v původním jazyce

Lightning-induced electron precipitation (LEP) events are important phenomena in the Earth's inner magnetosphere, where atmospheric lightning strokes cause energetic electron loss from the radiation belts. Lightning strokes generate electromagnetic waves that penetrate the ionosphere and propagate through the Earth's magnetosphere as so-called lightning-generated whistlers. They interact with radiation belt electrons, decreasing their pitch angles and causing their eventual loss in the atmosphere. At low altitudes, LEP events in satellite data are characterized by a sudden increase in wave intensity across a wide range of frequencies accompanied by an increase in precipitating electron flux. We detect and analyze LEP events using wave and particle burst mode data measured by the DEMETER satellite between 2004 and 2010. We develop a semi-automatic procedure to identify these events, detecting more than 400 events in total. The identified events mostly occur at L-shells between approximately 2 and 3.75, and extend up to energies of about 200 keV. Most events are detected above the U.S. East Coast, possibly related to significant lightning activity and the location westward of the South Atlantic Anomaly. Finally, we estimate total precipitating electron fluxes and wave intensities based on the average LEP properties and lightning occurrence rate, and we show that the individual isolated LEP events appear to be insufficient to explain the observed summer-winter differences in the precipitating electron fluxes above the U.S. region.

Název v anglickém jazyce

Lightning-Induced Electron Precipitation Events Observed at Low Altitudes

Popis výsledku anglicky

Lightning-induced electron precipitation (LEP) events are important phenomena in the Earth's inner magnetosphere, where atmospheric lightning strokes cause energetic electron loss from the radiation belts. Lightning strokes generate electromagnetic waves that penetrate the ionosphere and propagate through the Earth's magnetosphere as so-called lightning-generated whistlers. They interact with radiation belt electrons, decreasing their pitch angles and causing their eventual loss in the atmosphere. At low altitudes, LEP events in satellite data are characterized by a sudden increase in wave intensity across a wide range of frequencies accompanied by an increase in precipitating electron flux. We detect and analyze LEP events using wave and particle burst mode data measured by the DEMETER satellite between 2004 and 2010. We develop a semi-automatic procedure to identify these events, detecting more than 400 events in total. The identified events mostly occur at L-shells between approximately 2 and 3.75, and extend up to energies of about 200 keV. Most events are detected above the U.S. East Coast, possibly related to significant lightning activity and the location westward of the South Atlantic Anomaly. Finally, we estimate total precipitating electron fluxes and wave intensities based on the average LEP properties and lightning occurrence rate, and we show that the individual isolated LEP events appear to be insufficient to explain the observed summer-winter differences in the precipitating electron fluxes above the U.S. region.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research-Space Physics

ISSN

2169-9380

e-ISSN

2169-9402

Svazek periodika

130

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

e2024JA033639

Kód UT WoS článku

001456245300001

EID výsledku v databázi Scopus

2-s2.0-105002037749