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Responses of properties in the plasma sheet and at the geosynchronous orbit to interplanetary shock
Yao, L.; Liu, Z. X.; Zuo, P. B.; Zhang, L. Q.; Duan, S. P.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationChinese Science Bulletin
2009
Volume54Issue:18Pages:3308-3317
ISSN1001-6538
Language英语
KeywordSolar Wind Dynamic Pressure Pulse Interplanetary Shock Plasma Sheet Geosynchronous Orbit Wind Dynamic Pressure Solar-wind Magnetic-field Sudden Impulses Substorms Pulse Lobe Enhancements Variability Parameters
AbstractOn July 22, 2004, the WIND spacecraft detected a typical interplanetary shock. There was sustaining weak southward magnetic field in the preshock region and the southward field was suddenly enhanced across the shock front (i.e., southward turning). When the shock impinged on the magnetosphere, the magnetospheric plasma convection was abruptly enhanced in the central plasma sheet, which was directly observed by both the TC-1 and Cluster spacecraft located in different regions. Simultaneously, the Cluster spacecraft observed that the dawn-to-dusk electric field was abruptly enhanced. The variations of the magnetic field observed by TC-1, Cluster, GOES-10 and GOES-12 that were distributed in different regions in the plasma sheet and at the geosynchronous orbit are obviously distinct. TC-1 observations showed that the magnetic intensity kept almost unchanged and the elevation angle decreased, but the Cluster spacecraft, which was also in the plasma sheet and was further from the equator, observed that the magnetic field was obviously enhanced. Simultaneously, GOES-12 located near the midnight observed that the magnetic intensity sharply increased and the elevation angle decreased, but GOES-10 located in the dawn side observed that the magnetic field was merely compressed with its three components all sharply increasing. Furthermore, the energetic proton and electron fluxes at nearly all channels observed by five LANL satellites located at different magnetic local times (MLTs) all showed impulsive enhancements due to the compression of the shock. The responses of the energetic particles were much evident on the dayside than those on the nightside. Especially the responses near the midnight were rather weak. In this paper, the possible reasonable physical explanation to above observations is also discussed. All the shock-induced responses are the joint effects of the solar wind dynamic pressure pulse and the magnetic field southward turning.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1139
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Yao, L.,Liu, Z. X.,Zuo, P. B.,et al. Responses of properties in the plasma sheet and at the geosynchronous orbit to interplanetary shock[J]. Chinese Science Bulletin,2009,54(18):3308-3317.
APA Yao, L.,Liu, Z. X.,Zuo, P. B.,Zhang, L. Q.,Duan, S. P.,&北京8701信箱.(2009).Responses of properties in the plasma sheet and at the geosynchronous orbit to interplanetary shock.Chinese Science Bulletin,54(18),3308-3317.
MLA Yao, L.,et al."Responses of properties in the plasma sheet and at the geosynchronous orbit to interplanetary shock".Chinese Science Bulletin 54.18(2009):3308-3317.
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