DOI: 10.1002/2013GL058136
论文题名: IMF dependence of the azimuthal direction of earthward magnetotail fast flows
作者: Pitkänen T. ; Hamrin M. ; Norqvist P. ; Karlsson T. ; Nilsson H.
刊名: Geophysical Research Letters
ISSN: 0094-8409
EISSN: 1944-8140
出版年: 2013
卷: 40, 期: 21 起始页码: 5598
结束页码: 5604
语种: 英语
英文关键词: fast flows
; magnetotail dynamics
; plasma sheet
Scopus关键词: Azimuthal direction
; Azimuthal flow
; fast flows
; Interplanetary magnetic fields
; Magnetic field line
; Magnetotail dynamics
; Plasma sheet
; Solar wind data
; Magnetic fields
; Solar system
; Plasma sheaths
; azimuth
; data set
; magnetic field
; plasma
; solar wind
英文摘要: Cluster magnetotail data together with ACE solar wind data from 2001 to 2009 are used to investigate the dependence of the azimuthal flow direction of earthward magnetotail fast flows on the interplanetary magnetic field (IMF). We find an indication that fast flows have favored azimuthal directions that have dependence on the IMF. Our results suggest that for positive IMF By, the favored azimuthal direction of the fast flows is dawnward in the northern plasma sheet and duskward in the southern plasma sheet. For negative IMF B y, an opposite situation takes place, the favored azimuthal flow directions are then duskward and dawnward in the northern and southern plasma sheet, respectively. As a possible explanation for the results, it is suggested that the untwisting reconnected magnetic field lines may direct the fast flows in the magnetotail, the field line twist itself being dependent on the IMF. Key Points Azimuthal flow direction of magnetotail fast flows is studied The azimuthal flow direction shows dependency on the IMF Untwisting reconnected magnetic field lines may direct the fast flows ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887549454&doi=10.1002%2f2013GL058136&partnerID=40&md5=a8292cb986143e2d0bad2aa4dd6759f9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5673
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, Umeå University, SE-90187, Umeå, Sweden
Recommended Citation:
Pitkänen T.,Hamrin M.,Norqvist P.,et al. IMF dependence of the azimuthal direction of earthward magnetotail fast flows[J]. Geophysical Research Letters,2013-01-01,40(21).