Quantification of Lightning-Induced Electron Precipitation Events on Electron Fluxes in the Radiation Belts

被引:2
|
作者
Pailoor, Nikhil [1 ]
Cohen, Morris [1 ,2 ]
Richardson, David [1 ]
Harid, Vijay [3 ]
Golkowski, Mark [3 ]
机构
[1] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA
[2] Georgia Inst Technol, Ctr Space Technol & Res, Atlanta, GA USA
[3] Univ Colorado, Dept Elect Engn, Denver, CO 80202 USA
基金
美国国家科学基金会;
关键词
TRIMPI EVENTS; PERTURBATIONS; IONOSPHERE; SCATTERING; SATELLITE;
D O I
10.1029/2022JA031153
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Lightning-induced Electron Precipitation (LEP) is a known process of electron loss in the Earth's radiation belts. An LEP event progresses with Very Low Frequency (VLF) radio wave radiation from lightning, trans-ionospheric propagation, and wave-particle gyroresonance interaction with energetic radiation belt electrons. Pitch angle scattered electrons then precipitate onto the ionosphere, allowing detection using VLF remote sensing using high power transmitters. The relative importance of LEP events as a radiation belt electron lifetime driver has heretofore been unclear. We build off a massive database of LEP events observed within the continental US (CONUS) by a network of VLF receivers. For each observed LEP event, based on the characteristics of the ionospheric disturbance, we apply a suite of models to estimate the total number of precipitating electrons, which we can then sum up over all LEP events to quantify lightning's contribution within CONUS. We find that LEP events within CONUS appear to be capable of removing a substantial fraction (up to 0.1%-1%) of radiation belt electrons between 33 and 1,000 keV, and may have stronger contributions to radiation belt losses than earlier estimates.
引用
收藏
页数:15
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