Geomagnetic responses in high latitudes during the storm of July 15—16, 2000

作     者：陈耿雄 杜爱民 徐文耀 陈鸿飞 洪明华 彭丰林 师恩齐 

作者机构：Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100101 China 

出 版 物：《Science China Mathematics》 (中国科学：数学（英文版）)

年 卷 期：2002年第45卷第z1期

页      面：132-141页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the National Natural Science Foundation of China (Grant No. 49734140) the National Foundation Research Fund (No G2000078406) 

主　　题：magnetic storm, field-aligned current, equivalent current, auroral electrojet. 

摘      要：The ionospheric equivalent currents in the high latitudes and the auroral electrojet sys- tem during the geomagnetic storm on July 15-16, 2000 are analyzed by using geomagnetic data from IMAGE chain. The large-scale vortices of equivalent currents are observed in the storm. The vortices on the dusk side of ionosphere correspond to four-celled pattern of plasma convection associated with NBZ, region I and region II field-aligned currents. Only one vortex can be found on the dawn side of ionosphere after interplanetary magnetic field (IMF) turns southward. In the initial phase of the storm, the center of eastward electrojets tends to shift equatorward. It arrives at 58.62 latitude of corrected geomagnetic coordinates (CGM). The westward electrojets are strong in the main phase. The center of westward electrojets in this period moves equatorward and may be beyond the southernmost station (56.45°) of the chain.