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The geomagnetic cutoff rigidities at high latitudes for different solar wind and geomagnetic conditions
Chu, W.; Qin, G.; Qin, G. (gqin@spaceweather.ac.cn)
Department空间科学部
Source PublicationAnnales Geophysicae
2016
Volume34Issue:1Pages:45-53
ISSN0992-7689
Language英语
AbstractStudying 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).
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5278
Collection空间科学部
Corresponding AuthorQin, G. (gqin@spaceweather.ac.cn)
Recommended Citation
GB/T 7714
Chu, W.,Qin, G.,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.,&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.
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