气候变化领域集成服务门户(CCPortal): Variations in Nightside Magnetic Field Topology at Mars

CCPortal

DOI	10.1029/2020GL088921
	Variations in Nightside Magnetic Field Topology at Mars
	Brain D.A.; Weber T.; Xu S.; Mitchell D.L.; Lillis R.J.; Halekas J.S.; Espley J.; Jakosky B.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	The Martian plasma environment contains a complex magnetic topology, with contributions from the interplanetary magnetic field (IMF) and crustal magnetic fields. The topology can control how plasma is exchanged between the solar wind and the Martian ionosphere. Here we use 7 years of suprathermal electron pitch angle distributions recorded by the Mars Global Surveyor (MGS) spacecraft to determine the topology at 2 am and 400 km on the Martian nightside as a function of geographic location and external drivers. Observations show that topology statistically varies with IMF direction, solar wind pressure, solar extreme ultraviolet (EUV) flux, and season. Changes in topology with IMF direction and season are consistent with changes in the likelihood of magnetic reconnection between individual crustal fields and the draped IMF. Changes in topology at a given location with solar wind pressure and solar EUV flux are consistent with reconfiguration of topological structures in the plasma environment. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Extreme ultraviolet lithography; Ionosphere; Magnetic fields; Solar wind; Structural dynamics; Topology; Wind effects; Crustal magnetic fields; Extreme ultraviolets; Interplanetary magnetic fields; Magnetic field topology; Magnetic reconnections; Mars global surveyor; Suprathermal electrons; Topological structure; Magnetoplasma; interplanetary dust; ionosphere; magnetic field; Mars; Martian atmosphere; plasma; solar wind; spacecraft; topology
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/169615
作者单位	Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States; Space Sciences Laboratory, University of California Berkeley, Berkeley, CA, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Brain D.A.,Weber T.,Xu S.,et al. Variations in Nightside Magnetic Field Topology at Mars[J],2020,47(19).
APA	Brain D.A..,Weber T..,Xu S..,Mitchell D.L..,Lillis R.J..,...&Jakosky B.M..(2020).Variations in Nightside Magnetic Field Topology at Mars.Geophysical Research Letters,47(19).
MLA	Brain D.A.,et al."Variations in Nightside Magnetic Field Topology at Mars".Geophysical Research Letters 47.19(2020).