DOI: 10.1002/2014GL060605
论文题名: Solar wind-driven thermospheric winds over the Venus North Polar region
作者: Lundin R. ; Barabash S. ; Futaana Y. ; Holmström M. ; Sauvaud J.-A. ; Fedorov A.
刊名: Geophysical Research Letters
ISSN: 0094-10006
EISSN: 1944-9737
出版年: 2014
卷: 41, 期: 13 起始页码: 4413
结束页码: 4419
语种: 英语
英文关键词: energetic neutral atoms
; solar wind forcing of Venus
; Venus polar thermosphere
Scopus关键词: Atmospherics
; Charge transfer
; Exchange interactions
; Ionosphere
; Oxygen
; Altitude distributions
; Energetic neutral atoms
; Neutral particles
; North polar region
; Polar thermosphere
; Solar wind interactions
; Thermospheric winds
; Wind forcing
; Solar wind
; atmospheric electricity
; ion exchange
; ionosphere
; polar region
; solar wind
; thermosphere
; Venus
; wind forcing
英文摘要: Data from the neutral particle imager (NPI) on Venus Express reveals the presence of a persistent +Y (Venus Solar-Oriented) flow of Energetic Neutral Atoms (ENAs) in the Venus polar thermosphere. The overall flow morphology and altitude distribution of ENAs, solar wind H+ (SWH+), and ionospheric O+ imply that SWH+&O+ Charge Exchange (CE) with thermosphere neutrals causes the ENA flow. A dusk-dawn and noon-midnight ENA flux asymmetry is consistent with an asymmetric CE-interaction with higher ENA fluxes in the dayside and dawn (+Y). Model ENA fluxes derived from CE between SWH+&O+ and a model oxygen thermosphere is consistent with NPI data. Adding energy-corrected NPI fluxes and ion fluxes gives essentially constant fluxes of ≈1012 part/(m2s) in the altitude range of 200-1200 km. The energy and momentum of the 1-10 km/s ion and ENA flow, induced by solar wind forcing, should have implications for wind patterns in the polar thermosphere above 200 km. Key Points The solar wind interaction with the Venus thermosphere leads to wind of ENAs The ENA wind may dominate the thermosphere flow above 200 km altitude Besides affecting wind patterns, it may also cause thermosphere oxygen depletion ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940253691&doi=10.1002%2f2014GL060605&partnerID=40&md5=dcb379bf64b7842172d0afa7a31e0b90
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7270
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. Solar wind-driven thermospheric winds over the Venus North Polar region[J]. Geophysical Research Letters,2014-01-01,41(13).