The magnetic configuration of the high-latitude cusp and dayside magnetopause under strong magnetic shears
文献类型：期刊论文
| 作者 | Shen, C.; Dunlop, M.; Ma, Y. H.; Chen, Z. Q.; Yan, G. Q.; Liu, Z. X.; Bogdanova, Y. V.; Sibeck, D. G.; Carr, C. M.; Zhang, Q. H. |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 116页码:A09228 |
| ISSN号 | 2169-9380 |
| 通讯作者 | Shen, C (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, 1 Nanertiao, Beijing 100190, Peoples R China. |
| 中文摘要 | This paper investigates the structure of the magnetic field near the magnetopause (MP) by analyzing the multiple-point magnetic measurements from the Cluster mission. In this paper, the spatial distribution of the curvature radius of the MP surface at the noon-midnight meridian and for situations with moderate dynamical pressure of solar wind is implied from direct measurements of magnetic field curvature for the first time. The investigation focused on conditions of strong magnetic shear and in which a clear boundary layer is present at the MP. It has been confirmed that the magnetic field lines surrounding the cusp bend sunward at the precusp region and tailward at the postcusp region, implying the existence of a cusp field indentation. The minimum curvature radius of the near-MP field at both precusp and postcusp regions is about 2 R-E. As the latitude decreases, the curvature radius at the MP increases gradually, so that, as the subsolar point is approached, the curvature radius of the MP is nearly equal to the geocentric distance. These results compare well with existing MP models but reveal the limitations inherent in such statistical estimates of local MP curvature, particularly surrounding the cusp regions. The analysis of the magnetic measurements has also verified the existence of the magnetic bottles at both precusp and postcusp regions, which may play a role for the trapping of the charged particles of magnetosphere. |
| 英文摘要 | This paper investigates the structure of the magnetic field near the magnetopause (MP) by analyzing the multiple-point magnetic measurements from the Cluster mission. In this paper, the spatial distribution of the curvature radius of the MP surface at the noon-midnight meridian and for situations with moderate dynamical pressure of solar wind is implied from direct measurements of magnetic field curvature for the first time. The investigation focused on conditions of strong magnetic shear and in which a clear boundary layer is present at the MP. It has been confirmed that the magnetic field lines surrounding the cusp bend sunward at the precusp region and tailward at the postcusp region, implying the existence of a cusp field indentation. The minimum curvature radius of the near-MP field at both precusp and postcusp regions is about 2 R-E. As the latitude decreases, the curvature radius at the MP increases gradually, so that, as the subsolar point is approached, the curvature radius of the MP is nearly equal to the geocentric distance. These results compare well with existing MP models but reveal the limitations inherent in such statistical estimates of local MP curvature, particularly surrounding the cusp regions. The analysis of the magnetic measurements has also verified the existence of the magnetic bottles at both precusp and postcusp regions, which may play a role for the trapping of the charged particles of magnetosphere. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 资助信息 | Ministry of Science and Technology of China [2011CB811404]; National Natural Science Foundation of China [40921063, 40974101]; Chinese Academy of Sciences (CAS) [2009S1-54] |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3177]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Shen, C.,Dunlop, M.,Ma, Y. H.,et al. The magnetic configuration of the high-latitude cusp and dayside magnetopause under strong magnetic shears[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116:A09228. |
| APA | Shen, C..,Dunlop, M..,Ma, Y. H..,Chen, Z. Q..,Yan, G. Q..,...&Lucek, E..(2011).The magnetic configuration of the high-latitude cusp and dayside magnetopause under strong magnetic shears.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,116,A09228. |
| MLA | Shen, C.,et al."The magnetic configuration of the high-latitude cusp and dayside magnetopause under strong magnetic shears".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 116(2011):A09228. |
入库方式： OAI收割
来源：国家空间科学中心
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