Some properties of field-aligned electron events in high-altitude polar regions
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- 作者：ZiYing Zhang ; JianKui Shi ; MingQuan Zhou ; ZhengWei Cheng…
- 关键词：field ; aligned electron ; IMF By ; high ; altitude polar region
- 刊名：Science China Earth Sciences
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：59
- 期：2
- 页码：436-444
- 全文大小：690 KB
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JianKui Shi (2)
MingQuan Zhou (1)
ZhengWei Cheng (2)
Hua Zhou (3)
1. College of Information Science and Technology, Beijing Normal University, Beijing, 100875, China
2. State Key Laboratory of Space Weather, National Space Science Center, Beijing, 100190, China
3. College of Applied Arts and Science of Beijing Union University, Beijing, 100191, China - 刊物主题：Earth Sciences, general;
- 出版者：Springer Berlin Heidelberg
- ISSN：1869-1897
文摘
Using data from the Cluster spacecraft from January 2003 to December 2004, we perform a statistical study on some properties of the field-aligned electron (FAE) events and interplanetary magnetic field (IMF) By dependence of FAE events with different durations in high-altitude polar regions. A total of 1335 FAE events were observed by the C3 spacecraft. More down-flowing events were observed in the Southern Hemisphere, and more up-flowing events were observed in the Northern Hemisphere. It proves that down-flowing events mainly originate from magnetosphere or solar wind and up-flowing events are mainly derived from ionosphere. Short-lifetime events showed a morning concentration in the magnetic local time distribution, and long-lifetime events were concentrated both before and after noon. For the IMF By dependence of the FAE events, short-lifetime events were much affected by IMF By and resulted in a morning concentration, while the long-lifetime events were almost unaffected by IMF By. With further analysis, we determined that the short-lifetime and long-lifetime events had different sources. Keywords field-aligned electron IMF By high-altitude polar region