Bow shock and magnetopause contributions to the cross-tail current from global MHD simulations
文献类型：期刊论文
| 作者 | Tang, B. B. ; Guo, X. C. ; Wang, C. ; Hu, Y. Q. ; Kan, J. R. |
| 刊名 | Journal of Geophysical Research-Space Physics
 |
| 出版日期 | 2009 |
| 卷号 | 114页码:A08203 |
| 关键词 | interplanetary magnetic-field solar-wind current systems magnetosphere generation closure |
| ISSN号 | 0148-0227 |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | We performed a series of global MHD simulations to study the closure of the cross-tail current in the magnetotail under different solar wind conditions. The cross-tail current closes totally within the magnetopause, forming the classical theta structure when IMF is set to be zero. The situation changes for southward IMF cases: part of the cross-tail current passes through the magnetosheath and closes across the bow shock, forming an overlapped q structure of the cross-tail current, when viewed from the Sun. Quantitative analysis shows that a larger strength of the southward IMF B-Z results in a higher percentage of current closed through the bow shock. Nearly a constant quantity of the cross-tail current comes from the bow shock despite variations in the solar wind speed. An increase in the ionospheric Pedersen conductance leads to an increase in the bow shock contribution but a decrease in the magnetopause contribution to the cross-tail current; therefore, the net cross-tail current is almost independent of the ionospheric conductance. Cross-tail current that closes across the bow shock rather than the magnetopause can be classified as the magnetic reconnection current, providing energy supply for dissipation needed at the magnetic reconnection region in the magnetotail. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | http://www.agu.org/pubs/crossref/2009/2009JA014325.shtml |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1148]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Tang, B. B.,Guo, X. C.,Wang, C.,et al. Bow shock and magnetopause contributions to the cross-tail current from global MHD simulations[J]. Journal of Geophysical Research-Space Physics,2009,114:A08203. |
| APA | Tang, B. B.,Guo, X. C.,Wang, C.,Hu, Y. Q.,&Kan, J. R..(2009).Bow shock and magnetopause contributions to the cross-tail current from global MHD simulations.Journal of Geophysical Research-Space Physics,114,A08203. |
| MLA | Tang, B. B.,et al."Bow shock and magnetopause contributions to the cross-tail current from global MHD simulations".Journal of Geophysical Research-Space Physics 114(2009):A08203. |
入库方式： OAI收割
来源：国家空间科学中心
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