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DOI | 10.1029/2020GL089000 |
Ionospheric plasma density oscillation related to EMIC Pc1 waves | |
Hyangpyo Kim; Kazuo Shiokawa; Jaeheung Park; Yoshizumi Miyoshi; Yukinaga Miyashita; Claudia Stolle; Khan‐; Hyuk Kim; Jü; rgen Matzka; Stephan Buchert; Tanja Fromm; Junga Hwang | |
2020-07-19 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | We report the first observation of plasma density oscillations coherent with magnetic Pc1 waves. Swarm satellites observed compressional Pc1 wave activity in the 0.5‐3 Hz band, which was coherent with in‐situ plasma density oscillations. Around the Pc1 event location, the Antarctic Neumayer station III (L ~ 4.2) recorded similar Pc1 events in the horizontal component while NOAA‐15 observed isolated proton precipitations at energies above 30 keV. All these observations support that the compressional Pc1 waves at Swarm are oscillations converted from electromagnetic ion cyclotron (EMIC) waves coming from the magnetosphere. The magnetic field and plasma density oscillate in‐phase. We compared the amplitudes of density and magnetic field oscillations normalized to background values and found that the density power is much larger than the magnetic field power. This difference cannot be explained by a simple magnetohydrodynamic (MHD) model, although steep horizontal/vertical gradients of background ionospheric density can partly reconcile the discrepancy. |
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/284202 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Hyangpyo Kim,Kazuo Shiokawa,Jaeheung Park,et al. Ionospheric plasma density oscillation related to EMIC Pc1 waves[J]. Geophysical Research Letters,2020. |
APA | Hyangpyo Kim.,Kazuo Shiokawa.,Jaeheung Park.,Yoshizumi Miyoshi.,Yukinaga Miyashita.,...&Junga Hwang.(2020).Ionospheric plasma density oscillation related to EMIC Pc1 waves.Geophysical Research Letters. |
MLA | Hyangpyo Kim,et al."Ionospheric plasma density oscillation related to EMIC Pc1 waves".Geophysical Research Letters (2020). |
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