Modeling inward diffusion and slow decay of energetic electrons in the Earth's outer radiation belt

被引：106

作者：

Ma, Q. ^{[1
]}

Li, W. ^{[1
]}

Thorne, R. M. ^{[1
]}

Ni, B. ^{[2
]}

Kletzing, C. A. ^{[3
]}

Kurth, W. S. ^{[3
]}

Hospodarsky, G. B. ^{[3
]}

Reeves, G. D. ^{[4
]}

Henderson, M. G. ^{[4
]}

Spence, H. E. ^{[5
]}

Baker, D. N. ^{[6
]}

Blake, J. B. ^{[7
]}

Fennell, J. F. ^{[7
]}

Claudepierre, S. G. ^{[7
]}

Angelopoulos, V. ^{[8
,9
]}

机构：

[1] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA

[2] Wuhan Univ, Sch Elect Informat, Dept Space Phys, Wuhan 430072, Peoples R China

[3] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[4] Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM USA

[5] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA

[6] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

[7] Aerosp Corp, Los Angeles, CA 90009 USA

[8] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[9] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 04期

基金：

美国国家科学基金会;

关键词：

WAVE-PARTICLE INTERACTIONS; RELATIVISTIC ELECTRONS; PITCH-ANGLE; EMIC WAVES; RESONANT SCATTERING; GEOMAGNETIC STORMS; ACCELERATION; LOSSES; CRRES; COEFFICIENTS;

D O I：

10.1002/2014GL062977

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A new 3-D diffusion code is used to investigate the inward intrusion and slow decay of energetic radiation belt electrons (>0.5 MeV) observed by the Van Allen Probes during a 10 day quiet period on March 2013. During the inward transport, the peak differential electron fluxes decreased by approximately an order of magnitude at various energies. Our 3-D radiation belt simulation including radial diffusion and pitch angle and energy diffusion by plasmaspheric hiss and electromagnetic ion cyclotron (EMIC) waves reproduces the essential features of the observed electron flux evolution. The decay time scales and the pitch angle distributions in our simulation are consistent with the Van Allen Probe observations over multiple energy channels. Our study suggests that the quiet time energetic electron dynamics are effectively controlled by inward radial diffusion and pitch angle scattering due to a combination of plasmaspheric hiss and EMIC waves in the Earth's radiation belts.

引用

页码：987 / 995

页数：9

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