Statistical research on the motion properties of the magnetotail current sheet:Cluster observations

作     者：H.REME E.LUCEK 

作者机构：Centre D'Etude Spatiale des RayonnementsUniversity Paul SabatierUniversity of ToulouseToulouseFrance UMR 5187CNRSToulouseFrance Space and Atmospheric Physics GroupBlackett LaboratoryImperialCollegeLondonUK 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2010年第53卷第6期

页      面：1732-1738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 (Grant Nos.40874086,40604022,40890162) the National Basic Research Program of China ("973" Project) (Grant No.2006CB806305) the Shandong Natural Science Foundation (Grant No.2009ZRB01352) the Specialized Research Fund for State Key Laboratories in China 

主　　题：magnetotail current sheet flapping motion source 

摘      要：The origin of the flapping motion of the earth’s magnetotail current sheet is one of the most important problems in the magnetotail *** Cluster data,we make a statistical research on the motion properties of the magnetotail current sheet of 2001 and *** calculate the velocities of the magnetotail current sheet using new methods and obtain the distribution of the magnetotail current sheet velocities in the X-Y plane in GSE coordinate *** results show that although most of the current sheets were propagating toward the tail flanks and those of the exceptions lay in dusk side,which is consistent with previous studies,the proportions of the current sheet which were propagating toward midnight (where |YGSE|=0) were higher than those in previous *** of the current sheet in the middle area (|YGSE|8 Re) of the magnetotail are *** high value of the Z component of the velocity further confirms that the middle area of the magnetotail might be a source region for the motion of the current sheets which were propagating towards the tail *** to our case studies,the way the current sheets propagated toward midnight area differs significantly from that toward dusk and dawn side,from which we infer that there might be two different kinds of current sheet motions originated from different *** statistical results of this paper may give some clues for further studies on the origin of the flapping motion of the magnetotail current sheet.