气候变化领域集成服务门户(CCPortal): Variability of the Solar Wind Flow Asymmetry in the Martian Magnetosheath Observed by MAVEN

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DOI	10.1029/2020GL090793
	Variability of the Solar Wind Flow Asymmetry in the Martian Magnetosheath Observed by MAVEN
	Romanelli N.; DiBraccio G.; Halekas J.; Dubinin E.; Gruesbeck J.; Espley J.; Poh G.; Ma Y.; Luhmann J.G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	We perform the first statistical analysis of effects that different external conditions have on a solar wind (SW) flow asymmetry observed in the Martian magnetosheath due to mass loading, making use of ∼5 years of Mars Atmosphere and Volatile EvolutioN (MAVEN) observations. We find that the difference between the mean magnetosheath SW velocity component along the SW convective electric field direction in regions in the positive and negative hemispheres displays a strong linear correlation with the ratio between the upstream Interplanetary Magnetic Field (IMF) cross-flow component (By) and the SW proton density (nsw). The asymmetry is maximized (∼25–35 km s−1) for low nsw (∼1 cm−3) and large IMF By (∼2 nT). These results suggest that the SW flow asymmetry variability is due to a force arising from the differential streaming between SW protons and oxygen ions, with boundary conditions partly defined by the pristine SW properties. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electric fields; Electric-field directions; External conditions; Interplanetary magnetic fields; Linear correlation; Mars atmosphere; Solar wind flow; Velocity components; Volatile evolution; Solar wind; boundary condition; electric field; magnetopause; Mars; oxygen; planetary atmosphere; planetary surface; 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/169438
作者单位	Planetary Magnetospheres Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; CRESST II, University of Maryland, Baltimore County, Catonsville, MD, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; Max-Planck-Institute for Solar System Research, Göttingen, Germany; CRESST II, Catholic University of America, Washington, DC, United States; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States; Space Sciences Laboratory, University of California, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Romanelli N.,DiBraccio G.,Halekas J.,et al. Variability of the Solar Wind Flow Asymmetry in the Martian Magnetosheath Observed by MAVEN[J],2020,47(22).
APA	Romanelli N..,DiBraccio G..,Halekas J..,Dubinin E..,Gruesbeck J..,...&Luhmann J.G..(2020).Variability of the Solar Wind Flow Asymmetry in the Martian Magnetosheath Observed by MAVEN.Geophysical Research Letters,47(22).
MLA	Romanelli N.,et al."Variability of the Solar Wind Flow Asymmetry in the Martian Magnetosheath Observed by MAVEN".Geophysical Research Letters 47.22(2020).