DOI: 10.1002/2016GL068033
论文题名: Electromagnetic disturbances observed near the dip region ahead of dipolarization front
作者: Zhao D. ; Fu S.Y. ; Sun W.J. ; Parks G.K. ; Zong Q.G. ; Shi Q.Q. ; Pu Z.Y. ; Cui Y.B. ; Wu T. ; Liu J. ; Zhou X.Z.
刊名: Geophysical Research Letters
ISSN: 0094-9115
EISSN: 1944-8846
出版年: 2016
卷: 43, 期: 7 起始页码: 3026
结束页码: 3034
语种: 英语
英文关键词: dip region
; Dipolarization front
; magnetosonic wave
Scopus关键词: Electric fields
; Free energy
; Ions
; Magnetism
; Phase space methods
; Dip region
; Dipolarization
; Electric field fluctuations
; Electromagnetic disturbances
; Magnetosonic waves
; Particle acceleration
; Phase space densities
; Strong magnetic fields
; Electromagnetic wave attenuation
英文摘要: Dipolarization front (DF) is a thin magnetic structure embedded in fast flows in the magnetotail, which plays an important role in particle acceleration, flow braking, wave excitation, and other related processes. Electromagnetic disturbances near the magnetic dip region in front of DFs are investigated using Time History of Events and Macroscale Interactions during Substorms probe observations in this paper. Strong magnetic field and electric field fluctuations, with several wave bands below and around the lower hybrid frequency, are found in an event on 21 March 2008. The properties of the wave are similar to that of magnetosonic wave. Detailed analyses show that the phase space density for ions in the perpendicular direction has a positive slope near the local Alfvén speed, which is a possible free-energy source for the generation of the wave. This type of ion distribution could result from the earthward reflected ions ahead of DF, though other forming mechanism could not be fully ruled out. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963574790&doi=10.1002%2f2016GL068033&partnerID=40&md5=f632111b271049e8786277fb24df8f5f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10078
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Earth and Space Sciences, Peking University, Beijing, China
Recommended Citation:
Zhao D.,Fu S.Y.,Sun W.J.,et al. Electromagnetic disturbances observed near the dip region ahead of dipolarization front[J]. Geophysical Research Letters,2016-01-01,43(7).