Westward ionospheric electric field perturbations on the dayside associated with substorm processes

doi:10.1029/2009JA014445

	Westward ionospheric electric field perturbations on the dayside associated with substorm processes
	Wei, Y.1; Pu, Z.1; Hong, M.3; Zong, Q.1; Ren, Z.3; Fu, S.1; Xie, L.1; Alex, S.2; Cao, X.1; Wang, J.1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2009-12-08
卷号	114
ISSN号	2169-9380
DOI	10.1029/2009JA014445
文献子类	Article
英文摘要	A controversy has risen in the direction of ionospheric electric field perturbation on the dayside caused by substorm expansion phase in recent years, i.e., eastward or westward. To exclude the effect of interplanetary magnetic field northward turning, the substorms without interplanetary field (IMF) trigger are required to investigate this issue. Previous works, such as that by Huang et al. (2004), showed that the eastward electric field perturbations caused by substorms can be observed. However, our case suggests that some substorms can produce strong westward electric field perturbations and drive westward equatorial electrojets on the dayside ionosphere. This westward electric field is created by an overshielding-like imbalance state of field-aligned currents (FACs), Region 2 (R2) FAC greater than Region 1 (R1) FAC, which is built up through R2 FAC enhancement rather than R1 FAC reduction due to IMF northward turning. The substorm processes should be responsible for the westward electric field especially through polar cap shrinkage and magnetic field dipolarization.
WOS关键词	MAGNETICALLY DISTURBED CONDITIONS ; MAGNETOSPHERIC SUBSTORMS ; EQUATORIAL ELECTROJET ; GEOMAGNETIC-FIELD ; ORIGIN ; PERIODS ; REGION ; MODEL ; ONSET
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000272717000002
资助机构	NSFC(40831061 ; NSFC(40831061 ; Chinese Key Research Project(2006CB806305) ; Chinese Key Research Project(2006CB806305) ; Postdoctoral Science Foundation ; Postdoctoral Science Foundation ; SOA Key Laboratory for Polar Science(KP2008008) ; SOA Key Laboratory for Polar Science(KP2008008) ; NSF(ATM-0432565) ; NSF(ATM-0432565) ; 40674080 ; 40674080 ; 40731056) ; 40731056) ; NSFC(40831061 ; NSFC(40831061 ; Chinese Key Research Project(2006CB806305) ; Chinese Key Research Project(2006CB806305) ; Postdoctoral Science Foundation ; Postdoctoral Science Foundation ; SOA Key Laboratory for Polar Science(KP2008008) ; SOA Key Laboratory for Polar Science(KP2008008) ; NSF(ATM-0432565) ; NSF(ATM-0432565) ; 40674080 ; 40674080 ; 40731056) ; 40731056) ; NSFC(40831061 ; NSFC(40831061 ; Chinese Key Research Project(2006CB806305) ; Chinese Key Research Project(2006CB806305) ; Postdoctoral Science Foundation ; Postdoctoral Science Foundation ; SOA Key Laboratory for Polar Science(KP2008008) ; SOA Key Laboratory for Polar Science(KP2008008) ; NSF(ATM-0432565) ; NSF(ATM-0432565) ; 40674080 ; 40674080 ; 40731056) ; 40731056) ; NSFC(40831061 ; NSFC(40831061 ; Chinese Key Research Project(2006CB806305) ; Chinese Key Research Project(2006CB806305) ; Postdoctoral Science Foundation ; Postdoctoral Science Foundation ; SOA Key Laboratory for Polar Science(KP2008008) ; SOA Key Laboratory for Polar Science(KP2008008) ; NSF(ATM-0432565) ; NSF(ATM-0432565) ; 40674080 ; 40674080 ; 40731056) ; 40731056)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71732]
专题	中国科学院地质与地球物理研究所
通讯作者	Wei, Y.
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Indian Inst Geomagnetism, Navi Mumbai 410218, India 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Wei, Y.,Pu, Z.,Hong, M.,et al. Westward ionospheric electric field perturbations on the dayside associated with substorm processes[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2009,114.
APA	Wei, Y..,Pu, Z..,Hong, M..,Zong, Q..,Ren, Z..,...&Chu, X..(2009).Westward ionospheric electric field perturbations on the dayside associated with substorm processes.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,114.
MLA	Wei, Y.,et al."Westward ionospheric electric field perturbations on the dayside associated with substorm processes".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 114(2009).