气候变化领域集成服务门户(CCPortal): Ionospheric Plasma Density Oscillation Related to EMIC Pc1 Waves

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DOI	10.1029/2020GL089000
	Ionospheric Plasma Density Oscillation Related to EMIC Pc1 Waves
	Kim H.; Shiokawa K.; Park J.; Miyoshi Y.; Miyashita Y.; Stolle C.; Kim K.-H.; Matzka J.; Buchert S.; Fromm T.; Hwang J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
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. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Magnetohydrodynamics; Magnetosphere; Plasma density; Background value; Compressional; Density oscillations; Density power; Event location; Ion cyclotrons; Ionospheric plasmas; Wave activity; Magnetoplasma; amplitude; electromagnetic wave; ionosphere; magnetic field; magnetohydrodynamics; magnetosphere; observational method; oscillation; plasma; precipitation (climatology); satellite data
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170011
作者单位	Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan; Korea Astronomy and Space Science Institute, Daejeon, South Korea; Korea University of Science and Technology, Daejeon, South Korea; GFZ German Research Centre for Geosciences, Potsdam, Germany; School of Space Research, Kyung Hee University, Gyeonggi, South Korea; Swedish Institute of Space Physics, Uppsala, Sweden; Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven, Germany
推荐引用方式 GB/T 7714	Kim H.,Shiokawa K.,Park J.,et al. Ionospheric Plasma Density Oscillation Related to EMIC Pc1 Waves[J],2020,47(15).
APA	Kim H..,Shiokawa K..,Park J..,Miyoshi Y..,Miyashita Y..,...&Hwang J..(2020).Ionospheric Plasma Density Oscillation Related to EMIC Pc1 Waves.Geophysical Research Letters,47(15).
MLA	Kim H.,et al."Ionospheric Plasma Density Oscillation Related to EMIC Pc1 Waves".Geophysical Research Letters 47.15(2020).