Profile of strong magnetic field By component in magnetotail current sheets

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题名:	Profile of strong magnetic field By component in magnetotail current sheets
作者:	郝玲妮;Rong, Z. J.;Wan, W. X.;Shen, C.;Li, X.;Dunlop, M. W.;Petrukovich, A. A.;Hau, L.-N.;Zhang, T. L.;Rème, H.;Du, A. M.;Lucek, E.
贡献者:	地球科學學院太空科學與工程學系
关键词:	Atmospheric sciences;current sheet;guide field;Magnetic fields;Magnetism;magnetotail;neutral sheet;Plasma physics;plasma sheet;Space
日期:	2012-01-01
上传时间:	2026-04-23 11:05:44 (UTC+8)
出版者:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
摘要:	摘要： The strong magnetic field By component (in GSM coordinates) has been increasingly noticed to play an important role in the dynamics of tail current sheet (CS). The distribution profile of strong By components in the tail CS (i.e., those with guide field), however, is not well known. In the present work, by using the simultaneous multipoint observations of Cluster satellites, the profile of a strong By component in tail current sheets is explored, through detailed case studies, as well as in a statistical study. It is discovered that around the midnight meridian, the strength of the strong By component, i.e., \|By\|, is basically enhanced at the center of the CS relative to that in the CS boundaries and lobes and forms a north‐south symmetric distribution about the center of CS. Generally, however, for strong guide field cases in the non‐midnight meridian, the profile of By strength basically becomes north‐south asymmetric, the strength of the By component in the northern side of the CS is found to be either stronger or weaker than that in the counterpart southern side. By considering the modulation of the tail flaring magnetic field with magnetic local time, we propose an interpretation to account for the variation of the By‐profile, which is supported by the statistical survey. These results offer an observation basis for further studies. 其他題名： J. Geophys. Res 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2012-06 出處： Journal of Geophysical Research: Space Physics, 2012-06, Vol.117 (A6), p.n/a 資源來源： Wiley Online Library All Journals 版權： 2012. American Geophysical Union. All Rights Reserved. 版權： Copyright American Geophysical Union 2012 識別號： ISSN: 0148-0227 識別號： ISSN: 2169-9380 識別號： EISSN: 2156-2202 識別號： EISSN: 2169-9402 識別號： DOI: 10.1029/2011JA017402
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