Improved method to derive equivalent current systems from global MHD simulations
文献类型：期刊论文
| 作者 | Zhang JiaoJiao; Wang Chi; Tang BinBin |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2014 |
| 卷号 | 57期号:1页码:167-173 |
| 关键词 | equivalent current systems global MHD model improved method |
| ISSN号 | 1674-7313 |
| 通讯作者 | Zhang, JJ (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China. |
| 英文摘要 | Derivation of equivalent current systems (ECS) from a global magnetospheric magnetohydrodynamics (MHD) model is very useful in studying magnetosphere-ionosphere coupling, ground induction effects, and space weather forecast. In this study we introduce an improved method to derive the ECS from a global MHD model, which takes account of the obliqueness of the magnetic field lines. By comparing the ECS derived from this improved method and the previous method, we find that the main characteristics of the ECS derived from the two methods are generally consistent with each other, but the eastward-westward component of the geomagnetic perturbation calculated from the ECS derived from the improved method is much stronger than that from the previous method. We then compare the geomagnetic perturbation as a function of the interplanetary magnetic field (IMF) clock angle calculated from the ECS derived from both methods with the observations. The comparison indicates that the improved method can improve the performance of the simulation. Furthermore, it is found that the incomplete counterbalance of the geomagnetic effect produced by the ionospheric poloidal current and field-aligned current (FAC) contributes to most of the eastward-westward component of geomagnetic perturbation. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1509]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Zhang JiaoJiao,Wang Chi,Tang BinBin. Improved method to derive equivalent current systems from global MHD simulations[J]. SCIENCE CHINA-EARTH SCIENCES,2014,57(1):167-173. |
| APA | Zhang JiaoJiao,Wang Chi,&Tang BinBin.(2014).Improved method to derive equivalent current systems from global MHD simulations.SCIENCE CHINA-EARTH SCIENCES,57(1),167-173. |
| MLA | Zhang JiaoJiao,et al."Improved method to derive equivalent current systems from global MHD simulations".SCIENCE CHINA-EARTH SCIENCES 57.1(2014):167-173. |
入库方式： OAI收割
来源：国家空间科学中心
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