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DOI | 10.1029/2020GL090027 |
Relation Between Shock‐related Impulse and Subsequent ULF wave in the Earth's Magnetosphere | |
Dianjun Zhang; Wenlong Liu; Xinlin Li; Theodore Sarris; Yongfu Wang; Chao Xiao; Zhao Zhang; John R. Wygant | |
2020-11-20 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | The generation of Pc4~5 ultra‐low‐frequency (ULF) waves after interplanetary shock‐induced electric field impulses in the Earth's magnetosphere is studied using Van Allen Probes measurements by investigating the relationship between the first impulses and subsequent resonant ULF waves. In the dayside, the relevant time scales of the first impulse is correlated better with local Alfvén speed than with local eigenfrequency, implying the temporal scale of the first impulse is more likely related to fast‐mode wave propagation rather than local field line resonance. There are only 20 out of 51 events with narrow‐band poloidal ULF waves induced after the first impulse, showing a higher chance for ULF wave generation at the locations where the impulse equivalent frequency scale matches the local eigenfrequency. It is suggested that the shock‐related ULF wave can be excited in the magnetosphere on condition that shock‐induced impulse has large enough amplitude with its frequency matching the local eigenfrequency. |
领域 | 气候变化 |
URL | 查看原文 |
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/304296 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Dianjun Zhang,Wenlong Liu,Xinlin Li,等. Relation Between Shock‐related Impulse and Subsequent ULF wave in the Earth's Magnetosphere[J]. Geophysical Research Letters,2020. |
APA | Dianjun Zhang.,Wenlong Liu.,Xinlin Li.,Theodore Sarris.,Yongfu Wang.,...&John R. Wygant.(2020).Relation Between Shock‐related Impulse and Subsequent ULF wave in the Earth's Magnetosphere.Geophysical Research Letters. |
MLA | Dianjun Zhang,et al."Relation Between Shock‐related Impulse and Subsequent ULF wave in the Earth's Magnetosphere".Geophysical Research Letters (2020). |
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