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DOI: 10.1002/2016GL068926
论文题名:
MAVEN observations of partially developed Kelvin-Helmholtz vortices at Mars
作者: Ruhunusiri S.; Halekas J.S.; McFadden J.P.; Connerney J.E.P.; Espley J.R.; Harada Y.; Livi R.; Seki K.; Mazelle C.; Brain D.; Hara T.; DiBraccio G.A.; Larson D.E.; Mitchell D.L.; Jakosky B.M.; Hasegawa H.
刊名: Geophysical Research Letters
ISSN: 0094-9600
EISSN: 1944-9331
出版年: 2016
卷: 43, 期:10
起始页码: 4763
结束页码: 4773
语种: 英语
英文关键词: ionosphere ; Kelvin-Helmholtz instability ; magnetosheath ; Mars ; MAVEN ; shear-driven waves
Scopus关键词: Ionosphere ; Ions ; Shear flow ; Boundary oscillations ; Centrifugal Forces ; Kelvin- helmholtz instabilities ; Kelvin-helmholtz vortices ; Magnetosheaths ; Mars ; MAVEN ; Volatile evolution ; Vortex flow ; data interpretation ; force ; ion ; Kelvin-Helmholtz instability ; magnetopause ; magnetosphere ; Mars ; Martian atmosphere ; oscillation ; satellite mission ; velocity ; vortex
英文摘要: We present preliminary results and interpretations for Mars Atmospheric and Volatile EvolutioN (MAVEN) observations of magnetosheath-ionospheric boundary oscillations at Mars. Using centrifugal force arguments, we first predict that a signature of fully rolled up Kelvin-Helmholtz vortices at Mars is sheath ions that have a bulk motion toward the Sun. The sheath ions adjacent to a vortex should also accelerate to speeds higher than the mean sheath velocity. We also predict that while the ionospheric ions that are in the vortex accelerate antisunward, they never attain speeds exceeding that of the sheath ions, in stark contrast to KH vortices that arise at the Earth's magnetopause. We observe accelerated sheath and ionospheric ions, but we do not observe sheath ions that have a bulk motion toward the Sun. Thus, we interpret these observations as KH vortices that have not fully rolled up. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971264730&doi=10.1002%2f2016GL068926&partnerID=40&md5=30cbc10d5b44e43e4cb64d6c58ab3af6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10563
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States

Recommended Citation:
Ruhunusiri S.,Halekas J.S.,McFadden J.P.,et al. MAVEN observations of partially developed Kelvin-Helmholtz vortices at Mars[J]. Geophysical Research Letters,2016-01-01,43(10).
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