Comparison of a new model with previous models for the low-latitude magnetopause size and shape  

作　　者：LIN RuiLin ZHANG XiaoXin LIU SiQing WANG YongLi GONG JianCun 

机构地区：[1]Centerfor Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]National Center for Space Weather, China Meteorological Administration, Beijing 100081, China [4]NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA

出　　处：《Chinese Science Bulletin》2010年第2期179-187,共9页

基　　金：supported by the National Basic Research Program of China (Grant No. G2006CB806300);National Natural Science Foundation of China (Grant Nos. 40774079 and 40890160);National High-Tech Research & Development Program of China (Grant No. 2007AA12Z314);Special Fund for Public Welfare Industry (me-teorology:GYHY200806024)

摘　　要：In this study, the advantages and the limitations of previous low-latitude magnetopause empirical models are discussed. In order to overcome their limitations and inherit their advantages, a new continuous function for the influence of the interplanetary magnetic field (IMF) Bz on the magnetopause, the Shue model function and the 613 low-latitude magnetopause crossings are used to construct a new low-latitude magnetopause model parameterized by the solar wind dynamic pressure (Dp) and IMF Bz. In comparison with the previous low-latitude magnetopause models, it is found that the new model improves the prediction capability and has a large range of validity for the low-latitude magnetopause. In addition, it is also demonstrated that the new model and the previous low-latitude magnetopause models are not appropriate for predicting the high-latitude magnetopause.In this study, the advantages and the limitations of previous low-latitude magnetopause empirical models are discussed. In order to overcome their limitations and inherit their advantages, a new continuous function for the influence of the interplanetary magnetic field （IMF） B2 on the magnetopause, the Shue model function and the 613 low-latitude magnetopause crossings are used to construct a new low-latitude magnetopause model parameterized by the solar wind dynamic pressure （Dp） and IMF B2. In comparison with the previous low-latitude magnetopause models, it is found that the new model improves the prediction capability and has a large range of validity for the low-latitude magnetopause. In addition, it is also demonstrated that the new model and the previous low-latitude magnetopause models are not appropriate for predicting the high-latitude magnetopause.

关 键 词：磁层顶 低纬度 国际货币基金组织 型号 形状 行星际磁场 经验模型 连续函数 

分 类 号：P353.1[天文地球—空间物理学] X124[天文地球—地球物理学]