Conjugate observations of flow diversion in the magnetotail and auroral arc extension in the ionosphere

doi:10.1002/jgra.50419

	Conjugate observations of flow diversion in the magnetotail and auroral arc extension in the ionosphere
	Yao, Z. H.1,2; Angelopoulos, V.2; Pu, Z. Y.1; Fu, S. Y.1; Kubyshkina, M.3; Liu, J.2; Chu, X. N.2; Nishimura, T.4; Cao, X.5; Du, A. M.5
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2013-08-01
卷号	118 期号:8 页码:4811-4816
关键词	Auroral Arc Field-aligned Current Compressional wave Flow Diversion
ISSN号	2169-9380
DOI	10.1002/jgra.50419
文献子类	Article
英文摘要	We present a case study of a plasma flow diversion event in the inner magnetosphere to illustrate the effects of near-Earth pressure evolution, field-aligned current (FAC) generation, and associated auroral evolution during conjugate observations from THEMIS satellites and All-Sky Imagers (ASIs) on 29 January 2008. At similar to 0831UT, an earthward flow at THC, at X similar to 18Re, was observed which was likely to be associated with an auroral streamer observed at the ASI station FSMI. Near-Earth satellites THD and THE, separated in the Y-direction by similar to 1Re, and magnetically mapping onto the preexisting aurora arc, also observed the earthward flow but with a small Alfven transit time of similar to 20 s between the magnetotail and the ionosphere. As the earthward flow arrived at THD and THE, the aurora arc near the footprints of THD and THE brightened. A duskward pressure gradient developed between THD and THE in the equatorial magnetotail, corresponding to an upward FAC and consistent with the auroral brightening. At similar to 0834 UT, an eastward diversion of the flow was observed first at THE and later at THD, further to the East. At the head of that flow, pressure variations, coherent between THE and THD, were observed to propagate Eastward at similar to 400km/s, consistent with an eastward auroral expansion near the footprints of THE and THD. Concurrent perturbations of the B-y component of the magnetic field signify eastward motion of a FAC pair at the two spacecraft locations. We interpret the pressure variations as the generator of the observed FAC that feeds the arc and its eastward expansion.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000324992300010
资助机构	NSFC(40974095 ; NSFC(40974095 ; Chinese Major Research Project(2011CB811404) ; Chinese Major Research Project(2011CB811404) ; NASA, U.S.(NAS5-02099) ; NASA, U.S.(NAS5-02099) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; 41031065 ; 41031065 ; 41011120250 ; 41011120250 ; 41274167 ; 41274167 ; 40904043 ; 40904043 ; 41004072) ; 41004072) ; NSFC(40974095 ; NSFC(40974095 ; Chinese Major Research Project(2011CB811404) ; Chinese Major Research Project(2011CB811404) ; NASA, U.S.(NAS5-02099) ; NASA, U.S.(NAS5-02099) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; 41031065 ; 41031065 ; 41011120250 ; 41011120250 ; 41274167 ; 41274167 ; 40904043 ; 40904043 ; 41004072) ; 41004072) ; NSFC(40974095 ; NSFC(40974095 ; Chinese Major Research Project(2011CB811404) ; Chinese Major Research Project(2011CB811404) ; NASA, U.S.(NAS5-02099) ; NASA, U.S.(NAS5-02099) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; 41031065 ; 41031065 ; 41011120250 ; 41011120250 ; 41274167 ; 41274167 ; 40904043 ; 40904043 ; 41004072) ; 41004072) ; NSFC(40974095 ; NSFC(40974095 ; Chinese Major Research Project(2011CB811404) ; Chinese Major Research Project(2011CB811404) ; NASA, U.S.(NAS5-02099) ; NASA, U.S.(NAS5-02099) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; Deutsches Zentrum fur Luft-und Raumfahrt(50QP0402) ; 41031065 ; 41031065 ; 41011120250 ; 41011120250 ; 41274167 ; 41274167 ; 40904043 ; 40904043 ; 41004072) ; 41004072)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87624]
专题	中国科学院地质与地球物理研究所
通讯作者	Pu, Z. Y.
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USA 3.St Petersburg State Univ, Inst Phys, St Petersburg 199034, Russia 4.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 6.Shandong Univ, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China 7.Max Planck Inst Solar Syst Res, Katlenburg Lindau, Germany
推荐引用方式 GB/T 7714	Yao, Z. H.,Angelopoulos, V.,Pu, Z. Y.,et al. Conjugate observations of flow diversion in the magnetotail and auroral arc extension in the ionosphere[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(8):4811-4816.
APA	Yao, Z. H..,Angelopoulos, V..,Pu, Z. Y..,Fu, S. Y..,Kubyshkina, M..,...&Wei, Y..(2013).Conjugate observations of flow diversion in the magnetotail and auroral arc extension in the ionosphere.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(8),4811-4816.
MLA	Yao, Z. H.,et al."Conjugate observations of flow diversion in the magnetotail and auroral arc extension in the ionosphere".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.8(2013):4811-4816.