磁层顶的Kelvin-Helmholtz不稳定性(Ⅳ)可压缩不稳定波的若干特性
doi: 10.11728/cjss1988.01.039 cstr: 32142.14.cjss1988.01.039
Kelvin-Helmholtz Instablity on the Magnetopause (IV) Some Properties of Compressible Surface Wave
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摘要: 本文讨论了磁层顶可压缩K-H不稳定波的若干特性,包括磁场扰动和密度扰动的位相关系,扰动磁场的偏振特性,时间增长率的午前午后非对称性,空间增长率及磁层脉动的地方时效应和K-H不稳定波对IMF的响应。分析表明,上述诸特性对于了解磁层边界区MHD波的起源和K-H不稳定性同地磁脉动的关系十分重要。Abstract: In this paper,several properties of the compressible Kelvin-Helmholtz unstable waves on the magnetopause including the phase relationship between δB and dp,the polarization of δB,the spatial growth rate and it's local time effects on the geomagnetic pulsations and the response of K-H unstable waves to the variations of IMF are investigated.It is shown that knowing these properties is very helpful in understanding the generations of both MHD weves in the magnetospheric boundary region and low frequency geomagnetic pulsstions.
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