The effect of the heliospheric current sheet on interplanetary shocks
文献类型：期刊论文
| 作者 | Xie, Y. Q. ; Wei, F. S. ; Xiang, C. Q. ; Feng, X. H. |
| 刊名 | Solar Physics
 |
| 出版日期 | 2006 |
| 卷号 | 238期号:2页码:377-390 |
| 关键词 | coronal mass ejections solar-wind plasma sheet geomagnetic storms arrival times propagation models earth geoeffectiveness association |
| ISSN号 | 0038-0938 |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | Using 180 interplanetary (IP) shock events associated with coronal mass ejections (CMEs) during 1997 - 2005, we investigate the influence of the heliospheric current sheet (HCS) upon the propagation and geoeffectiveness of IP shocks. Our preliminary results are: ( 1) The majority of CME-driving IP shocks occurred near the HCS. ( 2) The numbers of shock events and related geomagnetic storms observed when the Earth and the solar source are located on the same side of the HCS, represented by f(SS) and f(SG), respectively, are obviously higher than those when the Earth and the solar source are located on the opposite sides of the HCS, denoted by f(OS) and f(OG), with f(SS)/ f(OS) = 126/54, f(SG)/ f(OG) = 91/ 36. ( 3) Parameter jumps across the shock fronts for the same-side events are also higher than those for the opposite-side events, and the stronger shocks (Delta V >= 200 km s(-1)) are mainly attributed to be same-side events, with f(SSh)/f(OSh) = 28/15, where f(SSh) and f(OSh) are numbers of stronger shocks which belong to same-side events and opposite-side events, respectively. ( 4) The level of the geomagnetic disturbances is higher for the same-side events than for the opposite-side events. The ratio of the number of intense magnetic storms (Dst < - 100) triggered by same-side events to those triggered by opposite-side events is 25/10. ( 5) We propose an empirical model to predict the arrival time of the shock at the Earth, whose accuracy is comparable to that of other prevailing models. These results show that the HCS is an important physical structure, which probably plays an important role in the propagation of interplanetary shocks and their geoeffectiveness. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | http://www.springerlink.com/content/v37n43lw5262r845/fulltext.pdf |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1052]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Xie, Y. Q.,Wei, F. S.,Xiang, C. Q.,et al. The effect of the heliospheric current sheet on interplanetary shocks[J]. Solar Physics,2006,238(2):377-390. |
| APA | Xie, Y. Q.,Wei, F. S.,Xiang, C. Q.,&Feng, X. H..(2006).The effect of the heliospheric current sheet on interplanetary shocks.Solar Physics,238(2),377-390. |
| MLA | Xie, Y. Q.,et al."The effect of the heliospheric current sheet on interplanetary shocks".Solar Physics 238.2(2006):377-390. |
入库方式： OAI收割
来源：国家空间科学中心
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