Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes

Zhenpeng Su; Fuliang Xiao; Huinan Zheng; Zhaoguo He; Hui Zhu; Min Zhang; Chao Shen; Yuming Wang; Shui Wang; C. A Kletzing; W. S Kurth; G. B Hospodarsky; H. E Spence; G. D Reeves; H. O Funsten; J. B Blake; D. N Baker

doi:10.1002/2013GL058912

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Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes

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Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes

Zhenpeng Su, Fuliang Xiao, Huinan Zheng, Zhaoguo He, Hui Zhu, Min Zhang, Chao Shen, Yuming Wang, Shui Wang, C. A Kletzing, …

Geophysical research letters, Vol.41(2), pp.229-235

01/28/2014

DOI: 10.1002/2013GL058912

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Abstract

Storm time electron radiation belt dynamics have been widely investigated for many years. Here we present a rarely reported nonstorm time event of electron radiation belt evolution observed by the Van Allen Probes during 21–24 February 2013. Within 2 days, a new belt centering around L=5.8 formed and gradually merged with the original outer belt, with the enhancement of relativistic electron fluxes by a factor of up to 50. Strong chorus waves (with power spectral density up to 10−4nT2/Hz) occurred in the region L>5. Taking into account the local acceleration driven by these chorus waves, the two-dimensional STEERB can approximately reproduce the observed energy spectrums at the center of the new belt. These results clearly illustrate the complexity of electron radiation belt behaviors and the importance of chorus-driven local acceleration even during the nonstorm times.

chorus wave

electron radiation belt

quasi-linear simulation

relativistic electron acceleration

Van Allen Probes

wave-particle interaction

Details

Title: Subtitle: Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes
Creators: Zhenpeng Su - Chinese Academy of Sciences
Fuliang Xiao - Changsha University of Science and Technology
Huinan Zheng - Chinese Academy of Sciences
Zhaoguo He - Chinese Academy of Sciences
Hui Zhu - Chinese Academy of Sciences
Min Zhang - University of Science and Technology of China
Chao Shen - Chinese Academy of Sciences
Yuming Wang - Chinese Academy of Sciences
Shui Wang - University of Science and Technology of China
C. A Kletzing - University of Iowa
W. S Kurth - University of Iowa
G. B Hospodarsky - University of Iowa
H. E Spence - University of New Hampshire
G. D Reeves - Los Alamos National Laboratory
H. O Funsten - Los Alamos National Laboratory
J. B Blake - The Aerospace Corporation
D. N Baker - University of Colorado Boulder
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.41(2), pp.229-235
DOI: 10.1002/2013GL058912
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Blackwell Publishing Ltd
Number of pages: 7
Language: English
Date published: 01/28/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984199779402771

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