Ionospheric polarization electric field guiding magnetopause reconnection: A conceptual model of throat aurora

作     者：Desheng HAN 

作者机构：State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2019年第62卷第12期

页      面：2099-2105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 Key R & D Program of China (Grant No. 2018YFC1407303) the National Natural Science Foundation of China (Grant Nos. 41774174, 41704159, 41831072 & 41431072) 

主　　题：Throat aurora Ionospheric polarization electric field Magnetopause reconnection Magnetosphere-ionosphere coupling Cusp ionosphere 

摘      要：Frequently observed throat auroras have been suggested to be correspondent to indentations on the subsolar magnetopause,but how these indentations can be generated is unknown *** on analyzing the detailed observational features of throat aurora,a conceptual model for generation of throat aurora is *** model suggests that precipitation of a north-south aligned stripy diffuse aurora can lead to an ionospheric conductivity enhancement and thus produce a polarization electric field in dusk-to-dawn direction in the *** mapping to the magnetosphere along closed field lines,this electric field can guide a magnetopause reconnection to develop inward the magnetosphere and result in a throat *** this model can comprehensively explain all the observational results that have been presented up to now,we argue that the assumption of ionospheric polarization electric field affecting magnetopause reconnection should be true and be worthy of further investigations.