DOI: 10.1002/2016GL070224
论文题名: Ion Larmor radius effects near a reconnection X line at the magnetopause: THEMIS observations and simulation comparison
作者: Phan T.D. ; Shay M.A. ; Haggerty C.C. ; Gosling J.T. ; Eastwood J.P. ; Fujimoto M. ; Malakit K. ; Mozer F.S. ; Cassak P.A. ; Oieroset M. ; Angelopoulos V.
刊名: Geophysical Research Letters
ISSN: 0094-8686
EISSN: 1944-8417
出版年: 2016
卷: 43, 期: 17 起始页码: 8844
结束页码: 8852
语种: 英语
英文关键词: diffusion region
; magnetic reconnection
; magnetopause
Scopus关键词: Magnetopause
; Magnetosphere
; Spacecraft
; Diffusion region
; Electron diffusion
; Flow stagnation
; Larmor radius effects
; Magnetic reconnections
; Magnetospheric field
; Parallel temperatures
; Simulation comparison
; Ions
英文摘要: We report a Time History of Events and Macroscale Interactions during Substorms (THEMIS-D) spacecraft crossing of a magnetopause reconnection exhaust ~9 ion skin depths (di) downstream of an X line. The crossing was characterized by ion jetting at speeds substantially below the predicted reconnection outflow speed. In the magnetospheric inflow region THEMIS detected (a) penetration of magnetosheath ions and the resulting flows perpendicular to the reconnection plane, (b) ion outflow extending into the magnetosphere, and (c) enhanced electron parallel temperature. Comparison with a simulation suggests that these signatures are associated with the gyration of magnetosheath ions onto magnetospheric field lines due to the shift of the flow stagnation point toward the low-density magnetosphere. Our observations indicate that these effects, ~2–3 di in width, extend at least 9 di downstream of the X line. The detection of these signatures could indicate large-scale proximity of the X line but do not imply that the spacecraft was upstream of the electron diffusion region. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988932462&doi=10.1002%2f2016GL070224&partnerID=40&md5=2f4975df5d40159824a458080be3053b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9649
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: Space Sciences Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Phan T.D.,Shay M.A.,Haggerty C.C.,et al. Ion Larmor radius effects near a reconnection X line at the magnetopause: THEMIS observations and simulation comparison[J]. Geophysical Research Letters,2016-01-01,43(17).