globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA024272
Scopus记录号: 2-s2.0-85043227467
论文题名:
Conjugate Observations of the Evolution of Polar Cap Arcs in Both Hemispheres
作者: Xing Z.; Zhang Q.; Han D.; Zhang Y.; Sato N.; Zhang S.; Hu Z.; Wang Y.; Ma Y.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:3
起始页码: 1794
结束页码: 1805
语种: 英语
英文关键词: all-sky imagers (ASIs) ; conjugacy ; interplanetary magnetic field ; polar cap arc (PCA)
英文摘要: We report results from the analysis of a case of conjugate polar cap arcs (PCAs) observed on 5 February 2006 in the Northern Hemisphere by the ground-based Yellow River Station all-sky imager (Svalbard) and in both hemispheres by the space-based DMSP/SSUSI and TIMED/GUVI instruments. The PCA's motion in dawn-dusk direction shows a clear dependence on the interplanetary magnetic field (IMF) By component and presents a clear asymmetry between Southern and Northern Hemispheres, that is, formed on the duskside and moving from dusk to dawn in the Northern Hemisphere and vice versa in the other hemisphere. The already existing PCAs' motion is influenced by the changes in the IMF By with a time delay of ~70 min. We also observed strong flow shears/reversals around the PCAs in both hemispheres. The precipitating particles observed in the ionosphere associated with PCAs showed properties of boundary layer plasma. Based on these observations, we might reasonably expect that the topological changes in the magnetotail can produce a strip of closed field lines and local processes would set up conditions for the formation and evolution of PCAs. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114416
Appears in Collections:气候减缓与适应

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作者单位: Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China; School of Ocean and Earth Science, Tongji University, Shanghai, China; Applied Physics Laboratory, The Johns Hopkins University, Laurel, MD, United States; National Institute of Polar Research, Tokyo, Japan; MIT Haystack Observatory, Westford, MA, United States; SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China

Recommended Citation:
Xing Z.,Zhang Q.,Han D.,et al. Conjugate Observations of the Evolution of Polar Cap Arcs in Both Hemispheres[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)
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