DOI: 10.1029/2018JA025456
Scopus记录号: 2-s2.0-85051057066
论文题名: Looking for Evidence of Wind-Shear Disconnections of the Earth's Magnetotail: GEOTAIL Measurements and LFM MHD Simulations
作者: Borovsky J.E.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 7 起始页码: 5538
结束页码: 5560
语种: 英语
英文关键词: comet tails
; discontinuities
; magnetosphere
; magnetotail
; wind shear
英文摘要: Disconnections of the Earth's magnetotail caused by abrupt wind shear in the solar wind are predicted by global magnetohydrodynamic simulations. Further, analysis of ACE spacecraft measurements finds that strong wind shears in the solar wind at Earth are common. In this report GEOTAIL observations in the distant (~200 RE) magnetotail are used to look for evidence of these predicted disconnection events. Three-dimensional global magnetohydrodynamic simulations using the LFM (Lyon-Fedder-Mobary) code were run to determine the expected signatures of magnetotail-disconnection events as seen by a spacecraft. Fourty-four magnetotail entry events on the dawnside of the distant magnetotail in the years 1993–1994 were examined individually and using superposed-epoch analysis. Signatures in the GEOTAIL measurements consistent with entry into the magnetotail from the magnetosheath caused by disconnection events were seen, particularly the temporal pattern of plasma flow and the temporal pattern of the magnetic field direction. Conclusive observations of magnetotail disconnections will probably have to await having measurements with a constellation of spacecraft in the magnetotail. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113655
Appears in Collections: 气候减缓与适应
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作者单位: Space Science Institute, Boulder, CO, United States
Recommended Citation:
Borovsky J.E.. Looking for Evidence of Wind-Shear Disconnections of the Earth's Magnetotail: GEOTAIL Measurements and LFM MHD Simulations[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)