The geomagnetic cutoff rigidities at high latitudes for different solar wind and geomagnetic conditions

	The geomagnetic cutoff rigidities at high latitudes for different solar wind and geomagnetic conditions
	Chu, W.; Qin, G.
刊名	Annales Geophysicae
	2016
卷号	34 期号:1 页码:45-53
ISSN号	0992-7689
通讯作者	Qin, G. (gqin@spaceweather.ac.cn)
英文摘要	Studying the access of the cosmic rays (CRs) into the magnetosphere is important to understand the coupling between the magnetosphere and the solar wind. In this paper we numerically studied CRs' magnetospheric access with vertical geomagnetic cutoff rigidities using the method proposed by Smart and Shea (1999). By the study of CRs' vertical geomagnetic cutoff rigidities at high latitudes we obtain the CRs' window (CRW) whose boundary is determined when the vertical geomagnetic cutoff rigidities drop to a value lower than a threshold value. Furthermore, we studied the area of CRWs and found out they are sensitive to different parameters, such as the z component of interplanetary magnetic field (IMF), the solar wind dynamic pressure, AE index, and Dst index. It was found that both the AE index and Dst index have a strong correlation with the area of CRWs during strong geomagnetic storms. However, during the medium storms, only AE index has a strong correlation with the area of CRWs, while Dst index has a much weaker correlation with the area of CRWs. This result on the CRW can be used for forecasting the variation of the cosmic rays during the geomagnetic storms. © 2016 Author(s).
收录类别	EI
语种	英语
公开日期	2016-03-08
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/5278]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Chu, W.,Qin, G.. The geomagnetic cutoff rigidities at high latitudes for different solar wind and geomagnetic conditions[J]. Annales Geophysicae,2016,34(1):45-53.
APA	Chu, W.,&Qin, G..(2016).The geomagnetic cutoff rigidities at high latitudes for different solar wind and geomagnetic conditions.Annales Geophysicae,34(1),45-53.
MLA	Chu, W.,et al."The geomagnetic cutoff rigidities at high latitudes for different solar wind and geomagnetic conditions".Annales Geophysicae 34.1(2016):45-53.