Throat aurora observed by DMSP/SSUSI in a global view

作     者：Su ZHOU Desheng HAN Sneha AGOKANI Ravindran SELVAKUMARAN Yongliang ZHANG Su ZHOU;Desheng HAN;Sneha A.GOKANI;Ravindran SELVAKUMARAN;Yongliang ZHANG

作者机构：State Key Laboratory of Marine GeologySchool of Ocean and Earth ScienceTongji UniversityShanghai 200092China State Key Laboratory of Space WeatherChinese Academy of SciencesBeijing 100190China School of Electronic and Communication EngineeringGuiyang UniversityGuiyang 550005China The Johns Hopkins University Applied Physics LaboratoryLaurelMD 20723USA 

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

年 卷 期：2020年第63卷第6期

页      面：891-898页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported by the National Key R&D Program of China(Grant No.2018YFC1407303) the National Natural Science Foundation of China(Grant Nos.41774174,41831072,41904139) the Department of Education of Guizhou Province(Grant No.QJHKYZ064) 

主　　题：Aurora Throat aurora Cusp Magnetopause indentation 

摘      要：Throat aurora was defined based on the ground observations near local noon and has been suggested to be the ground signature of an indentation on the subsolar magnetopause.A global view of the auroral oval with throat aurora will be critical for inferring global processes at the magnetopause,but it has never been *** imaging spectrograph observations from Defense Meteorological Satellite Program satellites,for the first time,here we show typical throat auroras in a global view and reveal some important observational facts as follows.(1)The throat auroras can be as long as^8 degrees in latitudinal direction,which is hardly to be fully seen in the ground-based camera.(2)The plasma flows and field aligned currents associated with throat aurora show consistences with previous radar observations,which have been suggested to be the observational evidence of magnetopause reconnection.(3)Most importantly,we confirmed that the electron and ion precipitations associated with throat aurora are always spatially separated,i.e.,electrons in the east and ions in the *** observational results not only establish a new picture of the aurora oval near local noon,but also provide important support to a conceptual model of throat aurora.