Plasmatrough exohiss waves observed by Van Allen Probes: Evidence for leakage from plasmasphere and resonant scattering of radiation belt electrons

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

doi:10.1002/2014GL062964

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Plasmatrough exohiss waves observed by Van Allen Probes: Evidence for leakage from plasmasphere and resonant scattering of radiation belt electrons

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Plasmatrough exohiss waves observed by Van Allen Probes: Evidence for leakage from plasmasphere and resonant scattering of radiation belt electrons

Hui Zhu, C. A Kletzing, W. S Kurth, Zhenpeng Su, Fuliang Xiao, G. B Hospodarsky, Huinan Zheng, Yuming Wang, Chao Shen, Tao Xian, …

Geophysical research letters, Vol.42(4), pp.1012-1019

02/28/2015

DOI: 10.1002/2014GL062964

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Abstract

Exohiss waves are whistler mode hiss observed in the plasmatrough region. We present a case study of exohiss waves and the corresponding background plasma distributions observed by the Van Allen Probes in the dayside low‐latitude region. The analysis of wave Poynting fluxes, suprathermal electron fluxes, and cold electron densities supports the scenario that exohiss leaks from the plasmasphere into the plasmatrough. Quasilinear calculations further reveal that exohiss can potentially cause the resonant scattering loss of radiation belt electrons ∼<MeV on a comparable time scale to that associated with the storm time plasmaspheric hiss. These results clearly illustrate that exohiss may need to be taken into account in future radiation belt models. Key Points Exohiss observed by Van Allen Probes in the low‐latitude plasmatrough Observational evidence for leakage of hiss from plasmasphere to plasmatrough Strong scattering loss effect of exohiss on radiation belt electrons

cyclotron resonance

exohiss

Landau damping

plasmaspheric hiss

radiation belt electron loss

Van Allen Probes

Details

Title: Subtitle: Plasmatrough exohiss waves observed by Van Allen Probes: Evidence for leakage from plasmasphere and resonant scattering of radiation belt electrons
Creators: Hui Zhu - CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences University of Science and Technology of China Hefei China
C. A Kletzing - University of Iowa
W. S Kurth - University of Iowa
Zhenpeng Su - Chinese Academy of Sciences
Fuliang Xiao - Changsha University of Science and Technology
G. B Hospodarsky - University of Iowa
Huinan Zheng - Chinese Academy of Sciences
Yuming Wang - University of Science and Technology of China
Chao Shen - Chinese Academy of Sciences
Tao Xian - University of Science and Technology of China
Shui Wang - University of Science and Technology of China
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.42(4), pp.1012-1019
DOI: 10.1002/2014GL062964
ISSN: 0094-8276
eISSN: 1944-8007
Number of pages: 8
Grant note: Chinese Academy of Sciences (KZCX2‐EW‐QN510; KZZD‐EW‐01‐4) JHU/APL (921647; 967399) National Key Basic Research Special Foundation of China (2011CB811403) NASA Prime (NAS5‐01072) National Natural Science Foundation (41274169; 41274174; 41422405; 41174125; 41131065; 41121003; 41074120; 41231066; 41304134)
Language: English
Date published: 02/28/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984199929202771

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