气候变化领域集成服务门户(CCPortal): Azimuthal Variation of Magnetopause Reconnection at Scales Below an Earth Radius

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DOI	10.1029/2019GL086500
	Azimuthal Variation of Magnetopause Reconnection at Scales Below an Earth Radius
	Zou Y.; Walsh B.M.; Atz E.; Liang H.; Ma Q.; Angelopoulos V.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	While magnetopause reconnection naturally occurs in three-dimensional environments, our understanding of the process has been mainly confined to the two-dimensional reconnection plane. How reconnection varies in the third direction, that is, the azimuthal direction, and what causes the variation remain open questions. We study the azimuthal variation of reconnection at an underexplored scale, which is below an Earth radius, using THEMIS spacecraft. Our results show that reconnection jets transition from being present to absent within tenths of a RE, corresponding to tens of ion inertial lengths. The absence of jets cannot be explained by an ion or electron diffusion region, or a magnetic flux rope flanked by two reconnection sites. The sharp transition of reconnection is associated with spatially varying waves. No drivers of the transition are identified locally at the magnetopause or in the upstream, implying that reconnection may naturally have a finite extent at certain stages of its development. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earth sciences; Geophysics; Azimuthal direction; Azimuthal variations; Electron diffusion; Ion inertial length; Magnetic flux ropes; Reconnection sites; Sharp transition; Three-dimensional environment; Magnetopause; azimuth; Earth; electron; flux measurement; magnetopause; scale effect; spacecraft
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/170710
作者单位	Department of Space Science, University of Alabama in Huntsville, Huntsville, AL, United States; Department of Mechanical Engineering and Center for Space Physics, Boston University, Boston, MA, United States; Department of Physics and Astronomy, West Virginia University, Morgantown, WV, United States; Department of Astronomy and Center for Space Physics, Boston University, Boston, MA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Zou Y.,Walsh B.M.,Atz E.,et al. Azimuthal Variation of Magnetopause Reconnection at Scales Below an Earth Radius[J],2020,47(4).
APA	Zou Y.,Walsh B.M.,Atz E.,Liang H.,Ma Q.,&Angelopoulos V..(2020).Azimuthal Variation of Magnetopause Reconnection at Scales Below an Earth Radius.Geophysical Research Letters,47(4).
MLA	Zou Y.,et al."Azimuthal Variation of Magnetopause Reconnection at Scales Below an Earth Radius".Geophysical Research Letters 47.4(2020).