Intense duskside lower band chorus waves observed by Van Allen Probes: Generation and potential acceleration effect on radiation belt electrons

Authors

Zhenpeng Su, University of Science and Technology of China
Hui Zhu, University of Science and Technology of China
Fuliang Xiao, Changsha University of Electric PowerFollow
Huinan Zheng, University of Science and Technology of China
Yuming Wang, University of Science and Technology of ChinaFollow
Zhaoguo He, Chinese Academy of Sciences, Beijing
Chao Shen, Chinese Academy of Sciences, Beijing
Chenglong Shen, University of Science and Technology of China
C. B. Wang, University of Science and Technology of China
Rui Liu, University of Science and Technology of China
Min Zhang, University of Science and Technology of China
Shui Wang, University of Science and Technology of China
C A. Kletzing, University of IowaFollow
W. S. Kurth, University of IowaFollow
G. B. Hospodarsky, University of IowaFollow
Harlan E. Spence, University of New HampshireFollow
Geoffrey Reeves, Los Alamos National LaboratoryFollow
H. O. Funsten, Los Alamos National LaboratoryFollow
J. B. Blake, Aerospace CorporationFollow
D. N. Baker, University of Colorado BoulderFollow
J. R. Wygant, University of Minnesota - Twin Cities

Abstract

Abstract

Local acceleration driven by whistler mode chorus waves largely accounts for the enhancement of radiation belt relativistic electron fluxes, whose favored region is usually considered to be the plasmatrough with magnetic local time approximately from midnight through dawn to noon. On 2 October 2013, the Van Allen Probes recorded a rarely reported event of intense duskside lower band chorus waves (with power spectral density up to 10^-3nT ²/Hz) in the low-latitude region outside of L=5. Such chorus waves are found to be generated by the substorm-injected anisotropic suprathermal electrons and have a potentially strong acceleration effect on the radiation belt energetic electrons. This event study demonstrates the possibility of broader spatial regions with effective electron acceleration by chorus waves than previously expected. For such intense duskside chorus waves, the occurrence probability, the preferential excitation conditions, the time duration, and the accurate contribution to the long-term evolution of radiation belt electron fluxes may need further investigations in future.

Department

Physics

Publication Date

6-2014

Journal Title

Journal of Geophysical Research: Space Physics

Publisher

American Geophysical Union Publications

Digital Object Identifier (DOI)

10.1002/2014JA019919

Document Type

Article

Recommended Citation

Su, Z., et al. (2014), Intenseduskside lower band choruswaves observed by Van AllenProbes: Generation and potentialacceleration effect on radiationbelt electrons, J. Geophys. Res.Space Physics, 119, 4266–4273,doi:10.1002/2014JA019919.

Rights

©2014. American Geophysical Union. All Rights Reserved.