Effect of interplanetary shock on an ongoing substorm:Simultaneous satellite-ground auroral observations  

作　　者：LIU JianJun CHEN XiangCai WANG ZhiQiang HU ZeJun ZHAO XingXin HU HongQiao HAN DeSheng LUI A.T.Y 

机构地区：[1]Ministry of Natural Resources(MNR),Key Laboratory for Polar Science,Polar Research Institute of China,Shanghai 200136,China [2]Antarctic Zhongshan National Field Observation and Research Station for Snow and Ice,Space Special Environment and Disasters,Polar Research Institute of China,Shanghai 200136,China [3]College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China [4]Institute of Space Physics and Applied Technology,Peking University,Beijing 100871,China [5]State Key Laboratory of Marine Geology,School of Ocean and Earth Science,Tongji University,Shanghai 200092,China [6]Applied Physics Laboratory,Johns Hopkins University,Laurel,Maryland,USA

出　　处：《Science China(Technological Sciences)》2023年第3期654-662,共9页中国科学（技术科学英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFE0106400);the National Scientific Foundation of China(Grant Nos.42120104003,41974185 and 42130210);Shanghai Science and Technology Innovation Action Plan(Grant Nos.21DZ1206100 and 22ZR1481200);SOA Key Laboratory for Polar Science(Grant No.KP201703);Chinese Meridian Project;MNR Innovative Youth Talents Program(Grant No.12110600000018003921)。

摘　　要：Substorm processes have been studied in detail,and it is well known that interplanetary(IP)shock encountering the terrestrial magnetosphere causes global responses.However,how IP shock compression to the magnetosphere affects the development of an ongoing substorm remains uninvestigated.Herein,the simultaneous satellite and ground-based auroral evolutions associated with an IP shock impact on the magnetopause during an ongoing substorm on May 7th,2005,were examined.The IMAGE satellite over the Southern Hemisphere captured the global development substorm,which was initiated at 17:38:47 UT.The poleward branch of the nightside auroral oval was fortuitously monitored by an all-sky camera at the Zhongshan Station(-74.5°magnetic latitude,ZHO)in Antarctica.The satellite imager observed continuous brightening and broadening of the nightside auroral oval after the IP shock arrival.The simultaneous ground-based optical aurora measurement displayed the intensification and expansion of a preexisting auroral surge poleward of the aurora oval.The geomagnetic field variations and the instantly increased PC indices indicated an elevated merging rate and enhanced the convection-related DP-2 currents.Therefore,this IP shock transient impact did not significantly change the ongoing development of the substorm,although it meets the magnetospheric precondition hypothesis.

关 键 词：interplanetary shock SUBSTORM global auroral images all-sky camera Zhongshan Station 

分 类 号：P352.7[天文地球—空间物理学]