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DOI | 10.1029/2020GL087365 |
The Relation Between Electron Cyclotron Harmonic Waves and Plasmapause: Case and Statistical Studies | |
Liu, Xu; Chen, Lunjin; Xia, Zhiyang | |
2020-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Observationally, electron cyclotron harmonic (ECH) waves are often terminated at the outer boundary of the plasmasphere boundary layer (PBL, i.e., plasmapause). Physics of this empirical relation is not well established. In this study, two categories of ECH waves are shown by their different behaviors near PBL. For Category I, all bands of ECH waves terminate at PBL because the density ratio (n(h)/n(c)) between hot and cold electrons decreases dramatically across PBL. For Category II, ECH waves, especially the lower harmonic bands, can be excited deeper inside the plasmasphere because n(h)/n(c) gradually decreases across PBL. A statistical study using Van Allen Probes observation is performed for these two categories. We find that the two categories of ECH waves are preferred to occur at nightside and dawnside. The two categories of ECH waves may be separated by the wave intensity outside the PBL or n(h)/n(c) with the threshold on the order of 10(-10)-10(-9) (V/m)(2) and 10(-2), respectively. |
英文关键词 | two types of ECH wave plasmapause instability excitation and attenuation mechanism statistical characteristics of two types of ECH wave |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000536639500024 |
WOS关键词 | DIFFUSION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279908 |
专题 | 气候变化 |
作者单位 | Univ Texas Dallas, William B Hanson Ctr Space Sci, Richardson, TX 75083 USA |
推荐引用方式 GB/T 7714 | Liu, Xu,Chen, Lunjin,Xia, Zhiyang. The Relation Between Electron Cyclotron Harmonic Waves and Plasmapause: Case and Statistical Studies[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(9). |
APA | Liu, Xu,Chen, Lunjin,&Xia, Zhiyang.(2020).The Relation Between Electron Cyclotron Harmonic Waves and Plasmapause: Case and Statistical Studies.GEOPHYSICAL RESEARCH LETTERS,47(9). |
MLA | Liu, Xu,et al."The Relation Between Electron Cyclotron Harmonic Waves and Plasmapause: Case and Statistical Studies".GEOPHYSICAL RESEARCH LETTERS 47.9(2020). |
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