气候变化领域集成服务门户(CCPortal): Scaling of Magnetic Reconnection With a Limited X-Line Extent

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DOI	10.1029/2020GL088147
	Scaling of Magnetic Reconnection With a Limited X-Line Extent
	Huang K.; Liu Y.-H.; Lu Q.; Hesse M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Contrary to all the 2-D models, where the reconnection x-line extent is infinitely long, we study magnetic reconnection in the opposite limit. An internal x-line asymmetry along the current direction develops because of the transport of reconnected magnetic flux by electrons beneath the ion kinetic scale, resulting in a suppression region identified in Liu et al. (2019, https://doi.org/10.1029/2019JA026539). In this letter, we incorporate the length scale of this suppression region ≃10di to quantitatively model the reduction of the reconnection rate and the maximum outflow speed observed in the short x-line limit. The average reconnection rate drops because of the limited active region (where the current sheet thins down to the electron inertial scale) within an x-line. The outflow speed reduction correlates with the decrease of the J × B force, that can be modeled by the phase shift between the J and B profiles, also as a consequence of the flux transport. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earth sciences; Geophysics; Active regions; Current direction; Current sheets; Flux transport; Ion kinetics; Magnetic reconnections; Reconnection rate; Speed reduction; Magnetism; current direction; electromagnetic field; electromagnetic wave; electron; geomagnetic field; ion exchange; outflow; two-dimensional modeling
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169621
作者单位	CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; CAS Center for Excellence in Comparative Planetology, Hefei, China; Department of Physics and Astronomy, Dartmouth College, Hanover, NH, United States; Department of Physics and Technology, University of Bergen, Bergen, Norway
推荐引用方式 GB/T 7714	Huang K.,Liu Y.-H.,Lu Q.,et al. Scaling of Magnetic Reconnection With a Limited X-Line Extent[J],2020,47(19).
APA	Huang K.,Liu Y.-H.,Lu Q.,&Hesse M..(2020).Scaling of Magnetic Reconnection With a Limited X-Line Extent.Geophysical Research Letters,47(19).
MLA	Huang K.,et al."Scaling of Magnetic Reconnection With a Limited X-Line Extent".Geophysical Research Letters 47.19(2020).