子午面磁层顶位形结构的MHD模拟研究An MHD Simulation Study on the Location and Shape of Magnetopause in Meridian Plane
母丽丽;顾斌;陈美红;张青梅;李传起;
摘要(Abstract)：
本文基于太阳风-磁层-电离层耦合的全球磁流体力学(MHD)数值模拟,研究几种典型的太阳风动压和行星际磁场条件下,地球子午面上方磁层顶的位置和形状特征,以及磁层顶位形参数日下点距离和磁层顶张角随行星际条件的变化规律。模拟结果表明:正午午夜子午面磁层顶位形具有内凹结构,当行星际磁场为南向时,随磁场强度增强,日下点距离减小;行星际磁场为北向时,随磁场强度增强,日下点距离增大。动压增大,日下点距离减小。南向磁场强度增强,磁层顶张角变大。这些模拟结果与基于卫星数据的高纬经验模型(B00)以及(Schield)模型的经验结论相吻合,说明MHD模拟是研究磁层顶位形的有效工具。特别是在高纬穿越数据的获得受限时,基于对磁层顶位形的物理理论研究构建的数值模拟数据是解决这一问题的有效途径。
关键词(KeyWords)： 子午面磁层顶;位置结构特征;MHD模拟
基金项目(Foundation): 国家自然科学基金资助项目(41174165,11105075)
作者(Authors): 母丽丽;顾斌;陈美红;张青梅;李传起;
DOI: 10.16088/j.issn.1001-6600.2012.02.027
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