DOI: 10.1002/2017JA024888
Scopus记录号: 2-s2.0-85042431411
论文题名: Global Characteristics of Electromagnetic Ion Cyclotron Waves Deduced From Swarm Satellites
作者: Kim H. ; Hwang J. ; Park J. ; Bortnik J. ; Lee J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 2 起始页码: 1325
结束页码: 1336
语种: 英语
英文关键词: EMIC waves
; low Earth orbit
; Swarm satellites
英文摘要: It is well known that electromagnetic ion cyclotron (EMIC) waves play an important role in controlling particle dynamics inside the Earth's magnetosphere, especially in the outer radiation belt. In order to understand the results of wave-particle interactions due to EMIC waves, it is important to know how the waves are distributed and what features they have. In this paper, we present some statistical analyses on the spatial distribution of EMIC waves in the low Earth orbit by using Swarm satellites from December 2013 to June 2017 (~3.5 years) as a function of magnetic local time, magnetic latitude, and magnetic longitude. We also study the wave characteristics such as ellipticity, wave normal angle, peak frequency, and wave power using our automatic wave detection algorithm based on the method of Bortnik et al. (2007, https://doi.org/10.1029/2006JA011900). We also investigate the geomagnetic control of the EMIC waves by comparing with geomagnetic activity represented by Kp and Dst indices. We find that EMIC waves are detected with a peak occurrence rate at midlatitude including subauroral region, dawn sector (3–7 magnetic local time), and linear polarization dominated with an oblique propagating direction to the background magnetic field. In addition, our result shows that the waves have some relation with geomagnetic activity; that is, they occur preferably during the geomagnetic storm's late recovery phase at low Earth orbit. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114493
Appears in Collections: 气候减缓与适应
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作者单位: Korea Astronomy and Space Science Institute, Daejeon, South Korea; Korea University of Science and Technology, Daejeon, South Korea; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Kim H.,Hwang J.,Park J.,et al. Global Characteristics of Electromagnetic Ion Cyclotron Waves Deduced From Swarm Satellites[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(2)