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题名: Temporal evolutions of the solar wind conditions at 1 AU prior to the near-Earth X lines in the tail: Superposed epoch analysis
作者: Zhang, L. Q.; Dai, L.; Baumjohann, W.; Lui, A. T. Y.; Wang, C.; Reme, H.; Dunlop, M. W.
作者部门: 空间科学部
通讯作者: Dai, L (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN号: 2169-9380
出版日期: 2016
卷号: 121, 期号:8, 页码:7488-7496
收录类别: SCI
项目资助者: National Natural Science Foundation of China [41231067, 41574161, 41374188] ; specialized research fund for state key laboratories
英文摘要: Utilizing conjunction observations of the Geotail and ACE satellites from 1998 to 2005, we investigated the temporal evolutions of the solar wind conditions prior to the formation of X lines in the near-Earth magnetotail. We first show the statistical properties of B-z, B-y, density, and velocity of the solar wind related to the 374 tail X line events. A superposed epoch analysis is performed to study the temporal evolutions of the solar wind conditions 5 h prior to the tail X lines. The solar wind conditions for tail X lines during southward interplanetary magnetic field (IMF) (SW-IMF) and northward IMF (NW-IMF) are analyzed. The main results are as follows: (1) For events classified as SW-IMF, near-Earth X line observations in the magnetosphere are preceded by similar to 2 h intervals of southward IMF; (2) for events classified as NW-IMF, the northward IMF orientation preceding near-Earth X line observations lasts similar to 40 min.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5634
Appears in Collections:空间科学部_期刊论文

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