气候变化领域集成服务门户(CCPortal): Is the Relation Between the Solar Wind Dynamic Pressure and the Magnetopause Standoff Distance so Straightforward?

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DOI	10.1029/2019GL086474
	Is the Relation Between the Solar Wind Dynamic Pressure and the Magnetopause Standoff Distance so Straightforward?
	Samsonov A.A.; Bogdanova Y.V.; Branduardi-Raymont G.; Sibeck D.G.; Toth G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:8
英文摘要	We present results of global magnetohydrodynamic simulations which reconsider the relationship between the solar wind dynamic pressure (Pd) and magnetopause standoff distance (RSUB). We simulate the magnetospheric response to increases in the dynamic pressure by varying separately the solar wind density or velocity for northward and southward interplanetary magnetic field (IMF). We obtain different values of the power law indices N in the relation (Formula presented.) depending on which parameter, density, or velocity, has been varied and for which IMF orientation. The changes in the standoff distance are smaller (higher N) for a density increase for southward IMF and greater (smaller N) for a velocity increase. An enhancement of the solar wind velocity for a southward IMF increases the magnetopause reconnection rate and Region 1 current that move the magnetopause closer to the Earth than it appears in the case of density increase for the same dynamic pressure. ©2020. The Authors.
英文关键词	Magnetohydrodynamics; Magnetopause; Velocity; Dynamic pressures; Interplanetary magnetic fields; Magnetohydrodynamic simulations; Magnetospheric response; Solar wind density; Solar wind dynamic pressure; Solar wind velocity; Stand-off distance (SoD); Solar wind; magnetic field; magnetohydrodynamics; magnetopause; magnetosphere; solar wind
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/170459
作者单位	Mullard Space Science Laboratory, University College London, Dorking, United Kingdom; RAL Space, Rutherford Appleton Laboratory, Science and Technology Facilities Council, Didcot, United Kingdom; NASA, Goddard Space Flight Center, Greenbelt, MD, United States; Department of Climate and Space, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Samsonov A.A.,Bogdanova Y.V.,Branduardi-Raymont G.,et al. Is the Relation Between the Solar Wind Dynamic Pressure and the Magnetopause Standoff Distance so Straightforward?[J],2020,47(8).
APA	Samsonov A.A.,Bogdanova Y.V.,Branduardi-Raymont G.,Sibeck D.G.,&Toth G..(2020).Is the Relation Between the Solar Wind Dynamic Pressure and the Magnetopause Standoff Distance so Straightforward?.Geophysical Research Letters,47(8).
MLA	Samsonov A.A.,et al."Is the Relation Between the Solar Wind Dynamic Pressure and the Magnetopause Standoff Distance so Straightforward?".Geophysical Research Letters 47.8(2020).