Some properties of field-aligned electron events in high-altitude polar regions

被引：0

作者：

ZHANG ZiYing ^{[1
]}

SHI JianKui ^{[2
]}

ZHOU MingQuan ^{[1
]}

CHENG ZhengWei ^{[2
]}

ZHOU Hua ^{[3
]}

机构：

[1] College of Information Science and Technology, Beijing Normal University

[2] State Key Laboratory of Space Weather,National Space Science Center

[3] College of Applied Arts and Science of Beijing Union University

来源：

ScienceChina(EarthSciences) | 2016年 / 59卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Field-aligned electron; IMF By; High-altitude polar region;

D O I：

暂无

中图分类号：

P353 [外层空间日地关系物理];

学科分类号：

070802 ;

摘要：

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.

引用

页码：436 / 444

页数：9