Evolution of the storm magnetic field disturbance around Earth's surface and the associated ring current as deduced from multiple ground observatories

doi:10.1002/2014JA020562

	Evolution of the storm magnetic field disturbance around Earth's surface and the associated ring current as deduced from multiple ground observatories
	Shen, C.1; Zeng, G.1,2; Li, X.3; Rong, Z. J.4,5
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2015
卷号	120 期号:1 页码:564-580
关键词	magnetic Storms ring current ground magnetic measurements storm indices gradient of magnetic field substorms
ISSN号	2169-9380
DOI	10.1002/2014JA020562
文献子类	Article
英文摘要	Based on the continuous magnetic measurements of the multiple ground observatories, the structure of the geomagnetic field disturbance and its temporal variations have been investigated, and the evolution of the storm ring current is deduced accordingly. Assuming that the geomagnetic disturbance around the Earth's surface is approximately linearly varying in space, the spatial gradient of the corrected H (geomagnetic horizontal) component can be obtained from the multiple ground observations. It is found that the maximum difference of the corrected H component around the Earth's surface, as calculated by the gradient of the corrected H component multiplied by the Earth diameter, represents well the asymmetric index Asy-H. The antidirection of the gradient of the corrected H component can be regarded as pointing to the position of the maximum partial ring current. It is shown that for ordinary magnetic storms with Dst>-200nT, the maximum partial ring current is located around the duskside during the main phase and the earlier stage of the recovery phase. At the later stage of the recovery phase, the position of the maximum partial ring current can possibly keep rotating eastward, indicating that the energetic electrons may play a significant role and the main ring current carriers may be the electrons at this stage. For the super storms (Dst<-200nT), the position of the maximum partial ring current is not as regular. Based on physical considerations, this investigation also provides new formulas of the definitions to the symmetric index Sym-H and asymmetric index Asy-H.
WOS关键词	STEADY MAGNETOSPHERIC CONVECTION ; PARKER-SCKOPKE RELATION ; SOLAR-WIND ; GEOMAGNETIC STORMS ; DST ; SUBSTORMS ; CLUSTER ; ORIGIN ; REGION ; DECAY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000349891300036
资助机构	Ministry of Science and Technology of China(2011CB811404) ; Ministry of Science and Technology of China(2011CB811404) ; National Natural Science Foundation of China(41231066 ; National Natural Science Foundation of China(41231066 ; China Postdoctoral Science Foundation(2012 T50132) ; China Postdoctoral Science Foundation(2012 T50132) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41374180 ; 41374180 ; 41204117) ; 41204117) ; Ministry of Science and Technology of China(2011CB811404) ; Ministry of Science and Technology of China(2011CB811404) ; National Natural Science Foundation of China(41231066 ; National Natural Science Foundation of China(41231066 ; China Postdoctoral Science Foundation(2012 T50132) ; China Postdoctoral Science Foundation(2012 T50132) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41374180 ; 41374180 ; 41204117) ; 41204117) ; Ministry of Science and Technology of China(2011CB811404) ; Ministry of Science and Technology of China(2011CB811404) ; National Natural Science Foundation of China(41231066 ; National Natural Science Foundation of China(41231066 ; China Postdoctoral Science Foundation(2012 T50132) ; China Postdoctoral Science Foundation(2012 T50132) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41374180 ; 41374180 ; 41204117) ; 41204117) ; Ministry of Science and Technology of China(2011CB811404) ; Ministry of Science and Technology of China(2011CB811404) ; National Natural Science Foundation of China(41231066 ; National Natural Science Foundation of China(41231066 ; China Postdoctoral Science Foundation(2012 T50132) ; China Postdoctoral Science Foundation(2012 T50132) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41374180 ; 41374180 ; 41204117) ; 41204117)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/86782]
专题	中国科学院地质与地球物理研究所
通讯作者	Shen, C.
作者单位	1.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 3.Univ Colorado, Lab Atmosphere & Space Phys, Boulder, CO 80309 USA 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shen, C.,Zeng, G.,Li, X.,et al. Evolution of the storm magnetic field disturbance around Earth's surface and the associated ring current as deduced from multiple ground observatories[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2015,120(1):564-580.
APA	Shen, C.,Zeng, G.,Li, X.,&Rong, Z. J..(2015).Evolution of the storm magnetic field disturbance around Earth's surface and the associated ring current as deduced from multiple ground observatories.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,120(1),564-580.
MLA	Shen, C.,et al."Evolution of the storm magnetic field disturbance around Earth's surface and the associated ring current as deduced from multiple ground observatories".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 120.1(2015):564-580.