| 磁层顶磁岛结构及其非线性行为 |
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| 引用本文： | 王宪民,濮祖荫.磁层顶磁岛结构及其非线性行为[J].地球物理学报,1996,39(1):7-16. |
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| 作者姓名： | 王宪民 濮祖荫 |
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| 作者单位： | 1. 北京航天医学工程研究所, 北京 100094;
2. 北京大学地球物理系和非线性中心, 北京 100871;
3. 武汉大学空间物理系; 武汉 430072 |
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| 基金项目： | 国家自然科学基金,国家科委攀登计划“非线性科学”资助 |
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| 摘 要： | 解析研究了磁层顶磁岛结构时间演化的非线性过程；推导出磁岛宽度的解析式和磁岛发生分叉、混沌的条件；论证了磁重联生成的磁岛有不稳定平衡结构，外扰作用会破坏该结构，使磁岛出现突变和混沌；说明了中小尺度太阳风脉动易使磁岛破碎，导致磁场湍动重联，形成小尺度结构．
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| 关 键 词： | 磁层顶 磁岛结构 湍动磁重联 非线性行为 地磁 |
| 收稿时间： | 1995-07-13 |
THE MAGNETO-ISLAND STRUCTURES ANDITS NONLINEAR PROPERTIES IN THE MAGNETOPAUSE |
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| WANG XIAN-MIN.THE MAGNETO-ISLAND STRUCTURES ANDITS NONLINEAR PROPERTIES IN THE MAGNETOPAUSE[J].Chinese Journal of Geophysics,1996,39(1):7-16. |
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| Authors: | WANG XIAN-MIN |
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| Institution: | 1. Institute of Space Medico-Engineering, Beijing 100094, China;
2. Department of Geophysics, Peking University, Bejing 100871, China;
3. Department of Space Physics, Wuhan University, Wuhan 430072, China |
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| Abstract: | In the paper,the nonlinear process of the time evolution of the magneto-island structures in the magnetopause are studied analytically,the analytic formula of the magneto-island width and the critical conditions of magneto-island bifurcation and chaos are gotten.It Is demontrated that the magneto-island is a Instable structure which can be destroyed by solar wind turbulence and can produce catastrophes and chaos.The results indicated that the medium and small scale solar wind turbulance destroy the magneto-island easily and cause turbulent magnetic reconnection and form small scale structures. |
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| Keywords: | Magnetopause Magneto-island structure Bifurcation Chaos Turbulent magnetic reconnection |
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