Spatial structures of magnetic depression in the Earth's high-altitude cusp: Cluster multipoint observations
文献类型：期刊论文
| 作者 | Shi, Q. Q. ; Pu, Z. Y. ; Soucek, J. ; Zong, Q. G. ; Xie, L. ; Chen, Y. ; Zhang, H. ; Li, L. ; Xia, L. D. ; Liu, Z. X. ; Lucek, E. ; Fazakerley, A. N. ; Reme, H. |
| 刊名 | Journal of Geophysical Research-Space Physics
 |
| 出版日期 | 2009 |
| 卷号 | 114页码:A10202 |
| 关键词 | mirror-mode structures linear instability hybrid simulations solar-wind magnetosheath field magnetosphere holes identification spacecraft |
| ISSN号 | 0148-0227 |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | Magnetic depression structures (magnetic holes) of short time duration from seconds to minutes have been studied using Cluster data in the high-latitude cusp. Our multispacecraft analysis revealed that the magnetic depressions are spatial structures traveling across the spacecraft, and this result was further strengthened by the calculation of the boundary normal directions and velocities using various methods. In this article, we show that multiple properties of the magnetic depressions are consistent with those of mirror structures observed in the magnetosheath or solar wind. The plasma in the cusp is rarely unstable with respect to mirror instability. However, as has been shown by previous studies, once a large magnetic hole is created by mirror instability, it becomes relatively stable and can survive for extended periods of time even if surrounding plasma conditions drop well below the mirror threshold. Although local generation of these structures cannot be completely ruled out in some cases, we propose an interpretation of the magnetic depressions observed in the cusp as mirror structures generated upstream and convected to the cusp by plasma flow. Specifically, the magnetic holes could be generated in the magnetosheath and enter the cusp due to the open geometry of the cusp magnetic field. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | http://www.agu.org/pubs/crossref/2009/2009JA014283.shtml |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1130]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Shi, Q. Q.,Pu, Z. Y.,Soucek, J.,et al. Spatial structures of magnetic depression in the Earth's high-altitude cusp: Cluster multipoint observations[J]. Journal of Geophysical Research-Space Physics,2009,114:A10202. |
| APA | Shi, Q. Q..,Pu, Z. Y..,Soucek, J..,Zong, Q. G..,Xie, L..,...&Reme, H..(2009).Spatial structures of magnetic depression in the Earth's high-altitude cusp: Cluster multipoint observations.Journal of Geophysical Research-Space Physics,114,A10202. |
| MLA | Shi, Q. Q.,et al."Spatial structures of magnetic depression in the Earth's high-altitude cusp: Cluster multipoint observations".Journal of Geophysical Research-Space Physics 114(2009):A10202. |
入库方式： OAI收割
来源：国家空间科学中心
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