磁云边界层与间断的观测研究
文献类型：期刊论文
| 作者 | 杨昉 |
| 刊名 | 空间科学学报
 |
| 出版日期 | 2008 |
| 卷号 | 28期号:2页码:107-113 |
| 关键词 | 磁云 磁云边界层 方向间断 |
| ISSN号 | 0254-6124 |
| 其他题名 | WIND Observation of Magnetic Cloud Boundary Layer and Discontinuity |
| 通讯作者 | 北京8701信箱 |
| 中文摘要 | 利用WIND飞船的磁场和等离子体观测数据,分析了1995年2月至2003年8月之间82个磁云中的边界层事件.我们认为(1)磁云边界层中方向间断DD(Directional Disoonltinuity)类型中RD (R0tational Discontinuity),TD(Tangential Discorltinuity),ED fEitller Discontinuity),ND (Neither Discontinuity)的分布为37:18:44:1(%),与背景太阳风中的分布51:12:35:2(%)不同;主要区别在于RD与TD的比例变化.(2)磁云边界层的内外边界切向间断的比例很高,占总数的20%,而且两侧的密度和温度平均相对变化分别为(?)=0.24和(?)=0.19,大于边界层内部的平均值,显示了更多的切向间断特征;此外,磁云边界层中方向间断的出现频次约为太阳风中的1.87倍.(3)磁云边界层中方向... |
| 英文摘要 | 82 boundary layer events in magnetic cloud between 1995.2-2003.8 were analyzed, using the data measured by WIND instruments.It is suggested from the results that:1) Among the types of the directional discontinuity (DD), the distribution of RD (Rotational Discontinuity), TD(Tangential Discontinuity), ED (Either Discontinuity), ND (Neither Discontinuity) is 37:18:44:1. It is different from 51:12:35:2 in solar wind. (2) The ratio of TD at boundary of Magnetic Cloud Boundary Layers (MCBL)is high, that is 20 percents of all the DD. And the relative variety of temperature and density at either side of discontinuity is }ON/N!二0.24 and }OT/T}二0.19, that is higher than the average inside the MCBL.It has much more TD' characters. The number of DD in MCBL per day is 1.87 times than that in solar wind;(3)The distribution of DD' normal direction in B-plane is likely a sinusoid structure, the center of which is B-24.900,217.490 that points to opposite direction to the sun. It is rather than a simple isotropy distribution. The preliminary results suggest that type.discontinuities are the important structures in MCBL which has different distribution of DD'This paper could provide some evidences for analyzing the formation of MCBL. |
| 学科主题 | 空间环境 |
| 收录类别 | CSCD |
| 资助信息 | 国家自然科学基金项目 |
| 语种 | 中文 |
| CSCD记录号 | CSCD:3222256 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/388]  |
| 专题 | 国家空间科学中心_空间环境部 |
| 推荐引用方式 GB/T 7714 | 杨昉. 磁云边界层与间断的观测研究[J]. 空间科学学报,2008,28(2):107-113. |
| APA | 杨昉.(2008).磁云边界层与间断的观测研究.空间科学学报,28(2),107-113. |
| MLA | 杨昉."磁云边界层与间断的观测研究".空间科学学报 28.2(2008):107-113. |
入库方式： OAI收割
来源：国家空间科学中心
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