DOI: 10.1002/grl.50309
论文题名: A large-scale flow vortex in the Venus plasma tail and its fluid dynamic interpretation
作者: Lundin R. ; Barabash S. ; Futaana Y. ; Holmström M. ; Perez-De-Tejada H. ; Sauvaud J.-A.
刊名: Geophysical Research Letters
ISSN: 0094-9194
EISSN: 1944-8925
出版年: 2013
卷: 40, 期: 7 起始页码: 1273
结束页码: 1278
语种: 英语
英文关键词: ion flow vortex
; solar wind forcing
; Venus ionosphere
Scopus关键词: Altitude range
; Celestial objects
; Fluid analysis
; Ion flow
; Large-scale flows
; Magnetosheaths
; Solar wind flow
; Wind forcing
; Ionosphere
; Ions
; Solar wind
; Wind power
; Vortex flow
; comet
; fluid dynamics
; ion
; ionosphere
; planetary atmosphere
; solar wind
; Venus
; vortex
; wind forcing
英文摘要: We report on the existence of a large-scale ion flow vortex, a curled tailward flow of solar wind H+ (SW H+), and ionospheric O+ in the Venus plasma tail. The vortex commences at dusk (-Y), driven by a transverse (to the solar wind) aberration flow component. Dusk magnetosheath and ionospheric ions move westward across the nightside into the dawn sector, from where the tailward and lateral flow merges into a tailward-moving vortex. A fluid analysis of the SW H+ energy and momentum (E&M) transfer to O+ at the terminator, shows that E&M balance (efficiency ≈1) is achieved in the altitude range of 1200-600 km. Below 600 km a westward O+ flow, moving along the direction of the atmospheric superrotation, dominates. Conversely, SW H+ dominates the high-altitude vortex. The Venus large-scale tail vortex is hardly unique. Other gaseous celestial objects (comets) orbiting the Sun may develop similar tail vortices. Key Points A large-scale ion flow vortex is formed in the Venus plasma tail A vortex driven by the aberrated + radially expanded solar wind flow over Venus An efficient transfer of solar wind energy and momentum to dayside/dusk O+ ions ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876903290&doi=10.1002%2fgrl.50309&partnerID=40&md5=1134c0bc27539de43380a7fdc29c70a7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6458
Appears in Collections: 气候减缓与适应
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作者单位: Swedish Institute of Space Physics, Kiruna, Sweden
Recommended Citation:
Lundin R.,Barabash S.,Futaana Y.,et al. A large-scale flow vortex in the Venus plasma tail and its fluid dynamic interpretation[J]. Geophysical Research Letters,2013-01-01,40(7).