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

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

^*Corresponding author for this work

University of Science and Technology of China
Chinese Academy of Sciences
Changsha University of Science and Technology
CAS - National Space Science Center
Anhui Jianzhu University
University of Iowa
University of New Hampshire
Los Alamos National Laboratory
Aerospace Corporation
University of Colorado Boulder

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

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.

Original language	English
Pages (from-to)	229-235
Number of pages	7
Journal	Geophysical Research Letters
Volume	41
Issue number	2
DOIs	https://doi.org/10.1002/2013GL058912
State	Published - 28 Jan 2014
Externally published	Yes

Keywords

Van Allen Probes
chorus wave
electron radiation belt
quasi-linear simulation
relativistic electron acceleration
wave-particle interaction

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10.1002/2013GL058912

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Su, Z., Xiao, F., Zheng, H., He, Z., Zhu, H., Zhang, M., Shen, C., Wang, Y., Wang, S., Kletzing, C. A., Kurth, W. S., Hospodarsky, G. B., Spence, H. E., Reeves, G. D., Funsten, H. O., Blake, J. B., & Baker, D. N. (2014). Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes. Geophysical Research Letters, 41(2), 229-235. https://doi.org/10.1002/2013GL058912

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title = "Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes",

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.",

keywords = "Van Allen Probes, chorus wave, electron radiation belt, quasi-linear simulation, relativistic electron acceleration, wave-particle interaction",

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

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doi = "10.1002/2013GL058912",

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T1 - Nonstorm time dynamics of electron radiation belts observed by the Van Allen Probes

AU - Su, Zhenpeng

AU - Xiao, Fuliang

AU - Zheng, Huinan

AU - He, Zhaoguo

AU - Zhu, Hui

AU - Zhang, Min

AU - Shen, Chao

AU - Wang, Yuming

AU - Wang, Shui

AU - Kletzing, C. A.

AU - Kurth, W. S.

AU - Hospodarsky, G. B.

AU - Spence, H. E.

AU - Reeves, G. D.

AU - Funsten, H. O.

AU - Blake, J. B.

AU - Baker, D. N.

PY - 2014/1/28

Y1 - 2014/1/28

N2 - 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.

AB - 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.

KW - Van Allen Probes

KW - chorus wave

KW - electron radiation belt

KW - quasi-linear simulation

KW - relativistic electron acceleration

KW - wave-particle interaction

UR - https://www.scopus.com/pages/publications/84892663653

U2 - 10.1002/2013GL058912

DO - 10.1002/2013GL058912

M3 - 文章

AN - SCOPUS:84892663653

SN - 0094-8276

VL - 41

SP - 229

EP - 235

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 2

ER -

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

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Keywords

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