气候变化领域集成服务门户(CCPortal): The Influence of Interplanetary Magnetic Field Direction on Martian Crustal Magnetic Field Topology

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DOI	10.1029/2020GL087757
	The Influence of Interplanetary Magnetic Field Direction on Martian Crustal Magnetic Field Topology
	Weber T.; Brain D.; Xu S.; Mitchell D.; Espley J.; Halekas J.; Mazelle C.; Lillis R.; DiBraccio G.; Jakosky B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Crustal magnetic fields influence a range of plasma processes at Mars, guiding the flow of energy from the solar wind into the planet's atmosphere at some locations while shielding the atmosphere at others. In this study we investigate how the topology of crustal fields varies with changes in the direction of the incoming interplanetary magnetic field (IMF). Using plasma measurements from Mars Atmosphere and Volatile Evolution (MAVEN) and Mars Global Surveyor (MGS), we identify magnetic topology throughout the Martian ionosphere and perform a statistical analysis of crustal magnetic field topology during different IMF configurations. We find that the topology of crustal field cusp regions is dependent on IMF direction and that cusps transition between open and closed topology regularly as they rotate through the nightside of Mars. Finally, we determine that cusps often become topologically closed due to reconnection with open magnetic fields in the Martian magnetotail, creating large closed loops that connect the dayside and nightside of Mars. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ionosphere; Magnetic fields; Topology; Crustal magnetic fields; Interplanetary magnetic fields; Magnetic topologies; Mars atmosphere; Mars global surveyor; Martian ionosphere; Plasma measurement; Volatile evolution; Magnetoplasma; interplanetary dust; ionosphere; magnetic field; Mars; Martian atmosphere; plasma; solar wind; topology; wave direction
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/169653
作者单位	Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Space Science Laboratory, University of California, Berkeley, CA, United States; Goddard Space Flight Center, Greenbelt, MD, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; IRAP, CNRS-University of Toulouse-UPS-CNES, Toulouse, France
推荐引用方式 GB/T 7714	Weber T.,Brain D.,Xu S.,et al. The Influence of Interplanetary Magnetic Field Direction on Martian Crustal Magnetic Field Topology[J],2020,47(19).
APA	Weber T..,Brain D..,Xu S..,Mitchell D..,Espley J..,...&Jakosky B..(2020).The Influence of Interplanetary Magnetic Field Direction on Martian Crustal Magnetic Field Topology.Geophysical Research Letters,47(19).
MLA	Weber T.,et al."The Influence of Interplanetary Magnetic Field Direction on Martian Crustal Magnetic Field Topology".Geophysical Research Letters 47.19(2020).