DOI: 10.1002/2017JA025094
Scopus记录号: 2-s2.0-85047557706
论文题名: Externally Driven Onset of Localized Magnetic Reconnection and Disruption in a Magnetotail Configuration
作者: Pritchett P.L. ; Lu S.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 4 起始页码: 2787
结束页码: 2800
语种: 英语
英文关键词: 3-D PIC simulation
; dawn-dusk asymmetry
; field-aligned currents
; localized magnetic reconnection
; plasma sheet disruption
英文摘要: The response of a magnetotail equilibrium containing dipole magnetic field and plasma sheet regions to the imposition of a longitudinally limited, high-latitude driving electric field is investigated using 3-D particle-in-cell simulations. The initial response involves a reduction in the equatorial Bz field that is then followed by the development of a dawn-dusk asymmetric thin current sheet relative to the meridian plane of the driving field. Continued driving leads to the onset of localized reconnection and the emergence of magnetic flux ropes. The cross-tail extent of the reconnection expands but remains limited to ∼30di, where di is the ion inertia length. A later stage involves disruption of the plasma sheet earthward of the initial X-line with the formation of multiple field-aligned currents connecting to the earthward boundary and strong local energization of the ions (4 times thermal) and electrons (10 times thermal). These results demonstrate the ability of a high-latitude disturbance that may be connected to dayside flow channels to initiate localized magnetic reconnection and disruption 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/114130
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics and Astronomy, University of California, Los Angeles, CA, United States; Institute of Geophysics and Planetary Physics, Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Pritchett P.L.,Lu S.. Externally Driven Onset of Localized Magnetic Reconnection and Disruption in a Magnetotail Configuration[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(4)