DOI: 10.1002/2016GL070280
论文题名: Modulation of chorus intensity by ULF waves deep in the inner magnetosphere
作者: Xia Z. ; Chen L. ; Dai L. ; Claudepierre S.G. ; Chan A.A. ; Soto-Chavez A.R. ; Reeves G.D.
刊名: Geophysical Research Letters
ISSN: 0094-8610
EISSN: 1944-8341
出版年: 2016
卷: 43, 期: 18 起始页码: 9444
结束页码: 9452
语种: 英语
英文关键词: chorus modulation
; inner magnetosphere
; ULF wave
; whistler wave
Scopus关键词: Electromagnetic waves
; Magnetosphere
; Modulation
; Probes
; Radiation belts
; Higher frequencies
; Inner magnetosphere
; Intensity variations
; Linear growth rate
; Low-frequency
; Nonlinear mechanisms
; ULF waves
; Whistler waves
; Atmospherics
英文摘要: Previous studies have shown that chorus wave intensity can be modulated by Pc4-Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f <∼ 0.3fce), but cannot account for the observed higher-frequency chorus waves, including the upper band chorus waves. This suggests the chorus waves at higher-frequency ranges require nonlinear mechanisms. In addition, we use combined observations of Radiation Belt Storm Probes (RBSP) A and B to verify that the ULF wave event is spatially local and does not last long. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84989360790&doi=10.1002%2f2016GL070280&partnerID=40&md5=e9b1532dfbc5888d1b62b4ca4a763d72
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9573
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: Department of Physics, University of Texas at Dallas, Richardson, TX, United States
Recommended Citation:
Xia Z.,Chen L.,Dai L.,et al. Modulation of chorus intensity by ULF waves deep in the inner magnetosphere[J]. Geophysical Research Letters,2016-01-01,43(18).