Nightside auroral arcs in high latitudes during substorms and their relationship with IMF

	Nightside auroral arcs in high latitudes during substorms and their relationship with IMF
	Hong, MH ; Hu, HQ ; Liu, RY ; Tang, KY
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2001
卷号	44 期号:1 页码:12-23
关键词	auroral arcs in high latitudes substorm IMF Zhongshan station Antarctica
ISSN号	0001-5733
文献子类	Article
英文摘要	Observations of all-sky auroral imaging, geomagnetic field, Pi2 pulsation from Zhongshan Station and IMF data from Wind satellite have been used to investigate 7 cases of nightside auroral arcs intensification and, fading in high latitudes. The characteristics of auroral arcs are as follows: All of arcs intensify briefly, and then fade lasting for 10-20min; the arcs nearly align along the Sun-Earth direction with pronounced duskward drift; most of the arcs occur after the interplanetary magnetic field (IMF) turns southward corresponding to the substorm growth or expansion phase, and IMF B-x > 0, IMF B-y < 0; the dawn-dusk drift of the arcs is in the opposite direction of IMF B-y; these ar cs have no close relation to magnetic activities and Pi2 pulsation. The present results suggest that the brief intensification of auroral arcs may be due to IMF B-x > 0 which favors magnetic reconnection in the southern lobe of the magnetotail, the are fading may be attributed to southward IMF B-x, and the dawn-dusk motion of the arcs may be driven by the effect of the IMF B-y on the motion of the reconnection site.
WOS关键词	INTERPLANETARY MAGNETIC-FIELD ; SUN-ALIGNED ARCS ; POLAR-CAP ARCS ; EARTHS MAGNETOSPHERE ; THETA-AURORA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000167701900002
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/77111]
专题	中国科学院地质与地球物理研究所
通讯作者	Hong, MH
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China 2.Polar Res Inst China, Shanghai 200129, Peoples R China
推荐引用方式 GB/T 7714	Hong, MH,Hu, HQ,Liu, RY,et al. Nightside auroral arcs in high latitudes during substorms and their relationship with IMF[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2001,44(1):12-23.
APA	Hong, MH,Hu, HQ,Liu, RY,&Tang, KY.(2001).Nightside auroral arcs in high latitudes during substorms and their relationship with IMF.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,44(1),12-23.
MLA	Hong, MH,et al."Nightside auroral arcs in high latitudes during substorms and their relationship with IMF".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 44.1(2001):12-23.