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Magnetospheric vortices and their global effect after a solar wind dynamic pressure decrease
Zhao, HY; Shen, XC; Tang, BB; Tian, AM; Shi, QQ; Weygand, JM; Yao, ZH; Zong, QG; Fu, SY; Yao, ST; Xiao, T; Pu, ZY; Shi, QQ (reprint author), Shandong Univ, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2016
Volume121Issue:2Pages:1071-1077
ISSN2169-9380
Language英语
KeywordNegative Solar Wind Dynamic Pressure Pulse Magnetosphere Vortex Field-aligned Current
AbstractUsing multipoint data from three Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellites, we report a magnetospheric flow vortex driven by a negative solar wind dynamic pressure pulse. The observed vortex rotated in a direction opposite to that associated with positive solar wind dynamic pressure pulses. The vortex was moving tailward, as confirmed by a global magnetohydrodynamics (MHD) simulation. In addition, the equivalent ionospheric currents (EICs) deduced from ground magnetometer station data reveal that a current vortex in the ionosphere near the foot point of the satellites has a rotation sense consistent with that observed in the magnetosphere. The field-aligned current (FAC) density estimated from three THEMIS satellites is about 0.15nA/m(2), and the total FAC of the vortex is about 1.5-3x10(5)A, on the order of the total FAC in a pseudobreakup, but less than the total FAC in most moderate substorms, 10(6)A. Key Points
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5401
Collection空间科学部
Corresponding AuthorShi, QQ (reprint author), Shandong Univ, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China.
Recommended Citation
GB/T 7714
Zhao, HY,Shen, XC,Tang, BB,et al. Magnetospheric vortices and their global effect after a solar wind dynamic pressure decrease[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016,121(2):1071-1077.
APA Zhao, HY.,Shen, XC.,Tang, BB.,Tian, AM.,Shi, QQ.,...&Shi, QQ .(2016).Magnetospheric vortices and their global effect after a solar wind dynamic pressure decrease.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,121(2),1071-1077.
MLA Zhao, HY,et al."Magnetospheric vortices and their global effect after a solar wind dynamic pressure decrease".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 121.2(2016):1071-1077.
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