globalchange  > 气候减缓与适应
DOI: 10.1029/2018JA025354
Scopus记录号: 2-s2.0-85050305210
论文题名:
Ion Injection Triggered EMIC Waves in the Earth's Magnetosphere
作者: Remya B.; Sibeck D.G.; Halford A.J.; Murphy K.R.; Reeves G.D.; Singer H.J.; Wygant J.R.; Farinas Perez G.; Thaller S.A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:6
起始页码: 4921
结束页码: 4938
语种: 英语
英文关键词: EMIC waves ; ion injections ; magnetic dip ; substorm ; Van Allen Probes
英文摘要: We present Van Allen Probe observations of electromagnetic ion cyclotron (EMIC) waves triggered solely due to individual substorm-injected ions in the absence of storms or compressions of the magnetosphere during 9 August 2015. The time at which the injected ions are observed directly corresponds to the onset of EMIC waves at the location of Van Allen Probe A (L = 5.5 and 18:06 magnetic local time). The injection was also seen at geosynchronous orbit by the Geostationary Operational Environmental Satellite and Los Alamos National Laboratory spacecraft, and the westward(eastward) drift of ions(electrons) was monitored by Los Alamos National Laboratory spacecraft at different local times. The azimuthal location of the injection was determined by tracing the injection signatures backward in time to their origin assuming a dipolar magnetic field of Earth. The center of this injection location was determined to be close to ∼20:00 magnetic local time. Geostationary Operational Environmental Satellite and ground magnetometer responses confirm substorm onset at approximately the same local time. The observed EMIC wave onsets at Van Allen Probe were also associated with a magnetic field decrease. The arrival of anisotropic ions along with the decrease in the magnetic field favors the growth of the EMIC wave instability based on linear theory analysis. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113782
Appears in Collections:气候减缓与适应

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作者单位: Indian Institute of Geomagnetism, Navi Mumbai, India; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Physics, Catholic University of America, Washington, DC, United States; Space Sciences Department, The Aerospace Corporation, Chantilly, VA, United States; Department of Astronomy, University of Maryland, College Park, MD, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; NOAA Space Weather Prediction Center, Boulder, CO, United States; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, United States

Recommended Citation:
Remya B.,Sibeck D.G.,Halford A.J.,et al. Ion Injection Triggered EMIC Waves in the Earth's Magnetosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)
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