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题名: Modulation of chorus intensity by ULF waves deep in the inner magnetosphere
作者: Xia, Zhiyang; Chen, Lunjin; Dai, Lei; Claudepierre, Seth G.; Chan, Anthony A.; Soto-Chavez, A.R.; Reeves, G.D.
作者部门: 空间科学部
通讯作者: Xia, Zhiyang (Zhiyang.Xia@utdallas.edu)
刊名: Geophysical Research Letters
ISSN号: 0094-8276
出版日期: 2016
收录类别: EI
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 ce), 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.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5617
Appears in Collections:空间科学部_期刊论文

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