气候变化领域集成服务门户(CCPortal): Correlations Between Dispersive Alfvén Wave Activity; Electron Energization; and Ion Outflow in the Inner Magnetosphere

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DOI	10.1029/2020GL088985
	Correlations Between Dispersive Alfvén Wave Activity; Electron Energization; and Ion Outflow in the Inner Magnetosphere
	Hull A.J.; Chaston C.C.; Bonnell J.W.; Damiano P.A.; Wygant J.R.; Reeves G.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Using measurements from the Van Allen Probes, we show that field-aligned fluxes of electrons energized by dispersive Alfvén waves (DAWs) are prominent in the inner magnetosphere during active conditions. These electrons have preferentially field-aligned anisotropies from 1.2 to >2 at energies ranging from tens of electron volts to several kiloelectron volts (keV), with largest values being coincident with magnetic field dipolarizations. Comparisons reveal that DAW energy densities and Poynting fluxes are strongly correlated with precipitating electron energies and energy fluxes and also O+ ion outflow energies. These observations yield empirical inner magnetosphere relations between the DAW and electron inputs and the O+ ion outflow response, providing important constraints for models. They also suggest that DAWs play an important role in enhancing field-aligned electron input into the ionosphere that facilitates the outflow and subsequent energization of O+ ions in the wave fields into the inner magnetosphere. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Dispersion (waves); Electron energy levels; Ionosphere; Ions; Magnetosphere; Active conditions; Electron energies; Electron energization; Electron volt; Energy density; Field-aligned electrons; Inner magnetosphere; Poynting flux; Electrons; atmospheric modeling; correlation; dispersion; electromagnetic field; electron; ionosphere; magnetosphere; measurement method; outflow; probe
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/169841
作者单位	Space Sciences Laboratory, University of California, Berkeley, CA, United States; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; School of Physics and Astronomy, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Los Alamos National Laboratory, Los Alamos, NM, United States
推荐引用方式 GB/T 7714	Hull A.J.,Chaston C.C.,Bonnell J.W.,et al. Correlations Between Dispersive Alfvén Wave Activity; Electron Energization; and Ion Outflow in the Inner Magnetosphere[J],2020,47(17).
APA	Hull A.J.,Chaston C.C.,Bonnell J.W.,Damiano P.A.,Wygant J.R.,&Reeves G.D..(2020).Correlations Between Dispersive Alfvén Wave Activity; Electron Energization; and Ion Outflow in the Inner Magnetosphere.Geophysical Research Letters,47(17).
MLA	Hull A.J.,et al."Correlations Between Dispersive Alfvén Wave Activity; Electron Energization; and Ion Outflow in the Inner Magnetosphere".Geophysical Research Letters 47.17(2020).