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Direct calculation of the ring current distribution and magnetic structure seen by Cluster during geomagnetic storms

文献类型：期刊论文

作者Shen, C.1; Yang, Y. Y.1,2; Rong, Z. J.3,4; Li, X.5; Dunlop, M.6; Carr, C. M.7; Liu, Z. X.1; Baker, D. N.5; Chen, Z. Q.1; Ji, Y.1,2
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2014-04-01
卷号119期号:4页码:2458-2465
关键词multiple-point measurements magnetic field lines field line curvature magnetic storms ring currents
ISSN号2169-9380
DOI10.1002/2013JA019460
文献子类Article
英文摘要Magnetic disturbances caused by the Earth's ring current, particularly during storm time activity, have a dominant effect on the geomagnetic field. Strong currents and large kinetic and magnetic energies can change considerably local field geometry and depress the ground geomagnetic field. The multispacecraft magnetic measurements of Cluster allow extensive in situ coverage of the ring current. We select 48 storm time Cluster crossing events to investigate the variation of the local current density distribution and magnetic configuration of the ring current. We find direct evidence for the existence of an inner, eastward flowing current in addition to the dominant westward current, in the ring plane. The radius of curvature of the magnetic field lines (MFLs) is found to be increasingly reduced at all local times during increasing storm activity, changing the resulting ring current magnetic geometry considerably, where the MFL configuration and the azimuthal current density distribution are asymmetric with the local time. During similar storm activity the radius of curvature of the local MFLs, R-c, is smallest on the nightside to duskside, medium on the dawnside, and largest on the dayside. This change in geometry may have significant influence on the spatial distribution of the particles with various energies in the plasmasphere, ring current, and radiation belts.
WOS关键词31 MARCH 2001 ; FIELD ; DENSITY
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000336218600007
出版者AMER GEOPHYSICAL UNION
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(2012T50132) ; China Postdoctoral Science Foundation(2012T50132) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41104114 ; 41104114 ; 41374180) ; 41374180) ; 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(2012T50132) ; China Postdoctoral Science Foundation(2012T50132) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41104114 ; 41104114 ; 41374180) ; 41374180) ; 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(2012T50132) ; China Postdoctoral Science Foundation(2012T50132) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41104114 ; 41104114 ; 41374180) ; 41374180) ; 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(2012T50132) ; China Postdoctoral Science Foundation(2012T50132) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Chinese Academy of Sciences (CAS)(2012T1G0018) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; 41104114 ; 41104114 ; 41374180) ; 41374180)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85616]  
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.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Ionospher Environm, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China
5.Univ Colorado, Lab Atmosphere & Space Phys, Boulder, CO 80309 USA
6.Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
7.Univ London Imperial Coll Sci Technol & Med, London, England
推荐引用方式
GB/T 7714		 Shen, C.,Yang, Y. Y.,Rong, Z. J.,et al. Direct calculation of the ring current distribution and magnetic structure seen by Cluster during geomagnetic storms[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2014,119(4):2458-2465.
APA Shen, C..,Yang, Y. Y..,Rong, Z. J..,Li, X..,Dunlop, M..,...&Zeng, G..(2014).Direct calculation of the ring current distribution and magnetic structure seen by Cluster during geomagnetic storms.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,119(4),2458-2465.
MLA Shen, C.,et al."Direct calculation of the ring current distribution and magnetic structure seen by Cluster during geomagnetic storms".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 119.4(2014):2458-2465.

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来源：地质与地球物理研究所

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