DOI: 10.1002/2016GL067687
论文题名: Intense low-frequency chorus waves observed by Van Allen Probes: Fine structures and potential effect on radiation belt electrons
作者: Gao Z. ; Su Z. ; Zhu H. ; Xiao F. ; Zheng H. ; Wang Y. ; Shen C. ; Wang S.
刊名: Geophysical Research Letters
ISSN: 0094-9420
EISSN: 1944-9151
出版年: 2016
卷: 43, 期: 3 起始页码: 967
结束页码: 977
语种: 英语
英文关键词: cyclotron resonance
; hiss-like band
; low-frequency chorus
; radiation belt
; rising tones
; Van Allen Probes
Scopus关键词: Cyclotron resonance
; Electrons
; Probes
; Radiation belts
; Wave power
; Electron gyrofrequency
; Frequency distributions
; Hiss-like band
; Low-frequency
; Orders of magnitude
; Radiation belt electrons
; Rising tones
; Whistler-mode chorus
; Atmospherics
; diffusion
; electron
; frequency analysis
; magnetic field
; momentum
; probe
; resonance
; wave power
英文摘要: Frequency distribution is a vital factor in determining the contribution of whistler mode chorus to radiation belt electron dynamics. Chorus is usually considered to occur in the frequency range 0.1-0.8fce-eq (with the equatorial electron gyrofrequency fce-eq). We here report an event of intense low-frequency chorus with nearly half of wave power distributed below 0.1fce-eq observed by Van Allen Probe A on 27 August 2014. This emission propagated quasi-parallel to the magnetic field and exhibited hiss-like signatures most of the time. The low-frequency chorus can produce the rapid loss of low-energy (∼0.1 MeV) electrons, different from the normal chorus. For high-energy (≥0.5 MeV) electrons, the low-frequency chorus can yield comparable momentum diffusion to that of the normal chorus but much stronger (up to 2 orders of magnitude) pitch angle diffusion near the loss cone. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961287070&doi=10.1002%2f2016GL067687&partnerID=40&md5=fddd7420a59eb4c0a78508b3baeee93a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10383
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China
Recommended Citation:
Gao Z.,Su Z.,Zhu H.,et al. Intense low-frequency chorus waves observed by Van Allen Probes: Fine structures and potential effect on radiation belt electrons[J]. Geophysical Research Letters,2016-01-01,43(3).