globalchange  > 气候减缓与适应
DOI: 10.1029/2018JA025255
Scopus记录号: 2-s2.0-85050395052
论文题名:
A Comparative Study of ULF Waves' Role in the Dynamics of Charged Particles in the Plasmasphere: Van Allen Probes Observation
作者: Ren J.; Zong Q.G.; Miyoshi Y.; Rankin R.; Spence H.E.; Funsten H.O.; Wygant J.R.; Kletzing C.A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:7
起始页码: 5334
结束页码: 5343
语种: 英语
英文关键词: cold plasmaspheric electrons acceleration ; drift-bounce resonance ; modification of electron and ion density profile ; substorm activities ; ULF waves
英文摘要: By analyzing observations from Van Allen Probes in its inbound and outbound orbits, we present evidence of coherent enhancement of cold plasmaspheric electrons and ions due to drift-bounce resonance with ultralow frequency (ULF) waves. From 18:00 UT on 28 May 2017 to 10:00 UT on 29 May 2017, newly formed poloidal mode standing ULF waves with significant electric field oscillations were observed in two consecutive orbits when Probe B was traveling inbound. In contrast to observations during outbound orbits, the cold (<150 eV) electrons measured by the HOPE instrument were characterized by flux enhancements several times larger and bidirectional pitch angle distributions during inbound orbits. The electron number density inferred from upper hybrid waves is twice as larger as during inbound orbits, which were also confirmed by an increase of spacecraft potential. The observed ULF waves are identified as second harmonic modes that satisfy the drift-bounce resonant condition of N = 1 with cold electrons. An enhancement of the plasmaspheric ion number density to restore charge neutrality of plasmas in inbound orbits is observed, which is associated with an increase of ULF wave periods. The observations suggest that the dynamics of plasmaspheric electrons is modified by ULF waves through drift-bounce resonance and that plasmaspheric ions are indirectly impacted. ©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/113588
Appears in Collections:气候减缓与适应

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作者单位: Institute of Space Physics and Applied Technology, Peking University, Beijing, China; Solar-Terrestrial Environmental Laboratory, Nagoya University, Nagoya, Japan; Department of Physics, University of Alberta, Edmonton, AB, Canada; Department of Physics Institute for Earth, Oceans and Space, University of New Hampshire, Durham, NH, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; School of Physics and Astronomy, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States

Recommended Citation:
Ren J.,Zong Q.G.,Miyoshi Y.,et al. A Comparative Study of ULF Waves' Role in the Dynamics of Charged Particles in the Plasmasphere: Van Allen Probes Observation[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)
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