Dependence of magnetic field just inside the magnetopause on subsolar standoff distance:Global MHD results

作     者：WANG Ming LU JianYong LIU ZiQian PEI ShiXin 

作者机构：College of Math ＆ Physics Nanjing University of Information Science ＆ Technology Nanjing 210044 China National Center for Space Weather China Meteorology Administration Beijing 100081 China Chinese Academy of Meteorological Sciences Beijing 100081 China Graduate University of Chinese Academy of Sciences Beijing 100049 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2012年第57卷第12期

页      面：1438-1442页

核心收录：

学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：supported by the National Natural Science Foundation of China(40874087 and 41031063) the China Meteorology Administration(GYHY201106011) the China Public Science and Technology Research Funds Projects of Ocean(201005017) 

主　　题：行星际磁场 地球磁层 磁流体 距离 国际货币基金组织 模型估计 相互作用 历史事件 

摘      要：The subsolar magnetopause is the boundary between the solar wind and the Earth s magnetosphere,where reduced solar wind dynamic pressure is equal to the magnetic pressure of the Earth s outer *** use a global magnetohydrodynamic (MHD)model to estimate the ratio f of the compressed magnetic field just inside the subsolar magnetopause to the purely dipolar magnetic *** also compare our numerical results to a similar work by Shue,which used Time History of Events and Macroscale Interactions during Substorms(THEMIS)*** results show that the ratio f is linearly proportional to the subsolar magnetopause standoff distance(r0)for both the northward and southward interplanetary magnetic field,properties consistent with Shue but with a smaller proportionality ***,previous theoretical studies show that f is nearly independent of the subsolar standoff *** global model results also show that f is smaller for the southward Interplanetary Magnetic Field(IMF)under the same r0,and that the proportionality constant for the southward IMF is larger than that for the northward *** conclusions agree with statistical results from observations by Shue.