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The magnetosphere under the radial interplanetary magnetic field: A numerical study
Tang, B. B.; Wang, C.; Li, W. Y.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2013-12-01
Volume118Issue:12Pages:7674-7682
ISSN2169-9402
Language英语
KeywordMagnetosphere State Radial Imf Global Mhd Simulation
AbstractWe investigate the magnetosphere under radial interplanetary magnetic fields (IMF) by using global magnetohydrodynamic simulations. The magnetosphere-ionosphere system falls into an unexpected state under this specific IMF orientation when the solar wind electric field vanishes. The most important features that characterize this state include (1) magnetic reconnections can still occur, which take place at the equatorward of the cusp in one hemisphere, the tailward of the cusp in the other hemisphere, and also in the plasma sheet; (2) significant north-south asymmetry exists in both magnetosphere and ionosphere; (3) the polar ionosphere mainly presents a weak two-cell convection pattern, with the polar cap potential valued at ∼30 kV; (4) the whole magnetosphere-ionosphere system stays in a very quiet state, and the AL index does not exceed −70 nT; and (5) the Kelvin-Helmholtz instability can still be excited at both flanks of the magnetosphere. These results imply the controlling role of the IMF direction between the solar wind and magnetosphere interactions and improve our understanding of the solar wind-magnetosphere-ionosphere system.; We investigate the magnetosphere under radial interplanetary magnetic fields (IMF) by using global magnetohydrodynamic simulations. The magnetosphere-ionosphere system falls into an unexpected state under this specific IMF orientation when the solar wind electric field vanishes. The most important features that characterize this state include (1) magnetic reconnections can still occur, which take place at the equatorward of the cusp in one hemisphere, the tailward of the cusp in the other hemisphere, and also in the plasma sheet; (2) significant north-south asymmetry exists in both magnetosphere and ionosphere; (3) the polar ionosphere mainly presents a weak two-cell convection pattern, with the polar cap potential valued at approximate to 30 kV; (4) the whole magnetosphere-ionosphere system stays in a very quiet state, and the AL index does not exceed -70 nT; and (5) the Kelvin-Helmholtz instability can still be excited at both flanks of the magnetosphere. These results imply the controlling role of the IMF direction between the solar wind and magnetosphere interactions and improve our understanding of the solar wind-magnetosphere-ionosphere system.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1528
Collection空间科学部
Corresponding Author北京8701信箱
AffiliationChinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Tang, B. B.,Wang, C.,Li, W. Y.,et al. The magnetosphere under the radial interplanetary magnetic field: A numerical study[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(12):7674-7682.
APA Tang, B. B.,Wang, C.,Li, W. Y.,&北京8701信箱.(2013).The magnetosphere under the radial interplanetary magnetic field: A numerical study.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(12),7674-7682.
MLA Tang, B. B.,et al."The magnetosphere under the radial interplanetary magnetic field: A numerical study".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.12(2013):7674-7682.
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