SuperDARN CUTLASS Finland radar observations of high-latitude magnetic reconnections under northward interplanetary magnetic field (IMF) conditions  

作　　者：ZHANG QingHe LIU RuiYuan YANG HuiGen HU HongQiao ZHANG BeiChen DUNLOP Malcolm LESTER Mark BOGDANOVA Yulia WALSH Andrew 

机构地区：[1]SOA Key Laboratoryfor Polar Science,Polar Research Institute of China,Shanghai 200136,China [2]Space Science Department,Rutherford-Appleton Laboratory,Chilton,Didcot,UK [3]Department of Physics and Astronomy,University of Leicester,Leicester,UK [4]Mullard Space Science Laboratory,University College London,Dorking,Surrey,UK

出　　处：《Science China(Technological Sciences)》2012年第5期1207-1216,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 41104091, 41031064, 40890164);the Youth Scientific and Technological Innovation Foundation, Polar Research Institute of China (Grant No. JDQ201001);the International Collaboration Supporting Project, Chinese Arctic and Antarctic Administration (Grant No. IC201112);the Ocean Public Welfare Scientific Research Project, State Oceanic Administration People's Republic of China (Grant No. 201005017)

摘　　要：A number of backscatter power enhancement events with ＂equatorward-moving radar auroral forms＂ in the high-latitude ionosphere were observed by SuperDARN CUTLASS Finland radar when the IMF was northward during 09：00 -10：00 UT on 26 March 2004. These events were also associated with sunward flow enhancements at each location in the Northern Hemisphere which were shown in ionospheric convections measured by the SuperDARN radars. These are typical features of high-latitude （lobe） magnetic reconnections. The durations of the velocity enhancements imply that the evolution time of the lobe reconnec- tions is about 8-16 rain from their origin at the reconnection site to their addition to the magnetotall lobe again. In additional, the Double Star TC-1 spacecraft was moving from magnetosheath into magnetosphere, and crossing the magnetopause near the subsolar region during this interval, and observed typical low-latitude magnetic reconnection signatures. This infers that the dayside high- and low-latitude reconnections may occur simultaneously.

关 键 词：high-latitude magnetic reconnection equatorward-moving radar auroral form evolution time of the lobe reconnections 

分 类 号：P353.1[天文地球—空间物理学]