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高纬磁层顶尾部边界层的离子流剪切不稳定性
Alternative TitleSHEARED ION FLOW INSTABILITY INMAGNETOPAUSE BOUNDARY LAYER AT THEHIGH-LATITUDE MAGNETOTAIL
路立; 刘振兴; 李中元; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2001
Volume21Issue:2Pages:124-130
ISSN0254-6124
Language中文
Keyword高纬磁层 地磁层 太阳风 动量传输 磁层顶边界层 磁鞘 磁层顶 离子剪切流不稳定性
Abstract研究了高纬磁层顶层部边界层在非均匀磁场条件下的离子流剪切不稳定性,由于考虑了尾向电流,我们发现离子流剪切不稳定性的激发与扰动波长有关,并得到了激发该不稳定性的准临界波长的表达式,对于磁层顶存在的波长为地球半径量级的表面波扰动,离子流剪切不稳定性倾向于发生在磁层顶边界层的内边界,沿磁层顶外边界传播的稳定的表面波和其内边界的离子流剪切不稳定性同时存在,这将有助于解释磁鞘太阳与动量持续不断地向地磁层的传输.
Other AbstractThe sheared ion flow instability is studied in an inhomogeneous plasma back-ground of magnetopause boundary layer at the high latitude magnetotail.By con-sidering tail-aligned currents, we find that the instability excitation strongly depend on the disturbed wavelength.The quasi-critical wave number for the instability is obtained.For relative long wavelength perturbation the instability tend to be excited at the inner edge of the boundary layer.The stable surface wave at magne-topause and the K-H instability at the inner edge of the boundary layer can exist at the same time,and that may help to transfer the momentum toward magnetosphere continuously.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.nssc.ac.cn/handle/122/1366
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
路立,刘振兴,李中元,等. 高纬磁层顶尾部边界层的离子流剪切不稳定性[J]. 空间科学学报,2001,21(2):124-130.
APA 路立,刘振兴,李中元,&北京8701信箱.(2001).高纬磁层顶尾部边界层的离子流剪切不稳定性.空间科学学报,21(2),124-130.
MLA 路立,et al."高纬磁层顶尾部边界层的离子流剪切不稳定性".空间科学学报 21.2(2001):124-130.
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