DOI: 10.1002/2015GL065865
论文题名: Ion acceleration and reflection on magnetotail antidipolarization fronts
作者: Zhou X.-Z. ; Pan D.-X. ; Angelopoulos V. ; Liu J. ; Runov A. ; Li S.-S. ; Li J.-Z. ; Zong Q.-G. ; Fu S.-Y.
刊名: Geophysical Research Letters
ISSN: 0094-8463
EISSN: 1944-8194
出版年: 2015
卷: 42, 期: 21 起始页码: 9166
结束页码: 9175
语种: 英语
英文关键词: antidipolarization front
; dipolarization front
; ion acceleration
; ion reflection
; reconnection front
; THEMIS statistics
Scopus关键词: Plasma sheaths
; Antidipolarization front
; Dipolarization
; Earth's magnetotail
; Ion accelerations
; Moving structures
; Reconnection front
; Reconnection sites
; Simulation model
; Ions
; energy dissipation
; flux measurement
; geomagnetic field
; ion exchange
; magnetotail
; numerical model
; observational method
; plasma
; polarization
; reflectivity
; trajectory
英文摘要: Antidipolarization fronts (ADFs), tailward moving structures in the Earth's magnetotail with sharp decreases in their magnetic Bz component, are thought to be mirror images of earthward propagating dipolarization fronts (DFs) generated on the opposite side of the reconnection site. We use ARTEMIS (Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon's Interaction with the Sun) observations and numerical simulations to study the role of ADFs in accelerating and reflecting ambient plasma sheet ions. In both case and statistical observations before ADF arrival, tailward streaming, energy-dispersed ions are seen first. After about 1 min, the ion fluxes are enhanced significantly with the peak shifted duskward, and then the peak gradually shifts back to the tailward direction until the ADF arrives. All these signatures are reproduced by our simulation model of ion acceleration and reflection on ADFs. We further examine typical ion trajectories before and after ADF reflection, to understand these seemingly complicated ion signatures as well as their similarities with and differences from the DF preceding signatures. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955196889&doi=10.1002%2f2015GL065865&partnerID=40&md5=a7c4a68580ba6d99563d4431743b5d79
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8079
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:
Zhou X.-Z.,Pan D.-X.,Angelopoulos V.,et al. Ion acceleration and reflection on magnetotail antidipolarization fronts[J]. Geophysical Research Letters,2015-01-01,42(21).