气候变化领域集成服务门户(CCPortal): Potential Evidence of Low-Energy Electron Scattering and Ionospheric Precipitation by Time Domain Structures

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DOI	10.1029/2020GL089138
	Potential Evidence of Low-Energy Electron Scattering and Ionospheric Precipitation by Time Domain Structures
	Shen Y.; Artemyev A.; Zhang X.-J.; Vasko I.Y.; Runov A.; Angelopoulos V.; Knudsen D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Plasma sheet electron precipitation is critical in magnetosphere-ionosphere coupling and has long been attributed to electron scattering by whistler-mode and electron cyclotron harmonic waves. Recent observations have revealed that time domain structures (TDSs) that appear as broadband electrostatic fluctuations may also scatter plasma sheet electrons. However, there has been no observational evidence of TDS scattering electrons into the ionosphere. This study presents potential evidence from conjugate observations between the Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission and the low-altitude Enhanced Polar Outflow Probe (e-POP) spacecraft. During the five events presented, THEMIS observed intense electron injections accompanied by TDSs, while e-POP captured precipitation of plasma sheet electrons with energies ∼100–325 eV over a broad pitch angle range. The observed TDSs can efficiently scatter these electrons exceeding the strong diffusion limit. Our results suggest that TDSs may contribute to plasma sheet electron scattering around times of injections. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospherics; Cyclotrons; Electron scattering; Ionosphere; Ionospheric measurement; Magnetosphere; Plasma sheaths; Diffusion limits; Electron cyclotron harmonic waves; Electron precipitation; Electrostatic fluctuation; Low altitudes; Low energy electron scattering; Magnetosphere-ionosphere coupling; Plasma sheet; Electrons; electron; harmonic analysis; ionosphere; magnetosphere; observational method; plasma; precipitation (climatology); probe; scattering; spacecraft
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169860
作者单位	Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States; Space Research Institute of Russian Academy of Sciences, Moscow, Russian Federation; Space Science Laboratory, University of California, Berkeley, CA, United States; Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada
推荐引用方式 GB/T 7714	Shen Y.,Artemyev A.,Zhang X.-J.,et al. Potential Evidence of Low-Energy Electron Scattering and Ionospheric Precipitation by Time Domain Structures[J],2020,47(16).
APA	Shen Y..,Artemyev A..,Zhang X.-J..,Vasko I.Y..,Runov A..,...&Knudsen D..(2020).Potential Evidence of Low-Energy Electron Scattering and Ionospheric Precipitation by Time Domain Structures.Geophysical Research Letters,47(16).
MLA	Shen Y.,et al."Potential Evidence of Low-Energy Electron Scattering and Ionospheric Precipitation by Time Domain Structures".Geophysical Research Letters 47.16(2020).