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	Evolvement of the ring current during a magnetic storm: tc-2 neutral atom imager observations
	Chen Zhi-Qing1,2; Shen Chao1; Lu Li1; McKenna-Lawlor, S.3; Liu Zhen-Xing1; Yan Guang-Qing1
刊名	Chinese journal of geophysics-chinese edition
	2010-10-01
卷号	53期号:10页码:2271-2279
关键词	Ring current Neutral atom imaging Magnetic storm
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2010.10.001
通讯作者	Chen zhi-qing(zhiqing@cssar.ac.cn)
英文摘要	A series of ena images were obtained by the nuadu instrument aboard tc-2 during a strong, long duration magnetic storm that occurred in november 2004. this paper follows the evolution of the ring current during this magnetic storm. it is shown that the southward imf b(z) component plays a key role in facilitating ion injection from the magnetotail into the inner magnetosphere with consequent enhancement of the ring current. ion injection stopped soon after the imf turned from southward to northward. also during ion injection episodes, the ion drift paths opened and ring current ions were lost at the noon to dusk magnetopause soon after they were injected at the dusk side region. as a result, the ring current intensified after the occurrence of an open-to-closed transformation of the ion drift paths, rather than at the stage when ion injection was strong. in the main phase of the storm, ion injection took place between 17 : 00 similar to 22 : 00 lt, leading to an extremely asymmetric ring current. in contrast in the recovery phase of the storm, ion injection region reached the post-midnight sector. we attributed this phenomenon to a significant positive imf b(y) component. a symmetrical ring current was formed after the drift paths changed back to a closed configuration due to a decrease in tail convection. when the storm entered its late recovery phase, the ring current faded away while the dst still indicated a strong magnetic disturbance. this suggested an important contribution to dst from the cross tail current.
WOS关键词	ION COMPOSITION VARIATIONS ; DOUBLE-STAR MISSION ; INNER MAGNETOSPHERE
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000283754800001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2411882
专题	中国科学院大学
通讯作者	Chen Zhi-Qing
作者单位	1.Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Coll Earth Sci, Beijing 100049, Peoples R China 3.Natl Univ Ireland, Maynooth, Kildare, Ireland
推荐引用方式 GB/T 7714	Chen Zhi-Qing,Shen Chao,Lu Li,et al. Evolvement of the ring current during a magnetic storm: tc-2 neutral atom imager observations[J]. Chinese journal of geophysics-chinese edition,2010,53(10):2271-2279.
APA	Chen Zhi-Qing,Shen Chao,Lu Li,McKenna-Lawlor, S.,Liu Zhen-Xing,&Yan Guang-Qing.(2010).Evolvement of the ring current during a magnetic storm: tc-2 neutral atom imager observations.Chinese journal of geophysics-chinese edition,53(10),2271-2279.
MLA	Chen Zhi-Qing,et al."Evolvement of the ring current during a magnetic storm: tc-2 neutral atom imager observations".Chinese journal of geophysics-chinese edition 53.10(2010):2271-2279.

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