globalchange  > 科学计划与规划
DOI: 10.1002/2016GL068327
论文题名:
The electric wind of Venus: A global and persistent “polar wind”-like ambipolar electric field sufficient for the direct escape of heavy ionospheric ions
作者: Collinson G.A.; Frahm R.A.; Glocer A.; Coates A.J.; Grebowsky J.M.; Barabash S.; Domagal-Goldman S.D.; Fedorov A.; Futaana Y.; Gilbert L.K.; Khazanov G.; Nordheim T.A.; Mitchell D.; Moore T.E.; Peterson W.K.; Winningham J.D.; Zhang T.L.
刊名: Geophysical Research Letters
ISSN: 0094-9717
EISSN: 1944-9448
出版年: 2016
卷: 43, 期:12
起始页码: 5926
结束页码: 5934
语种: 英语
英文关键词: ambipolar field ; ionospheric escape ; polar wind ; polarization electric field ; Venus
Scopus关键词: Electric fields ; Heavy ions ; Ionosphere ; Ionospheric measurement ; Ambipolar electric fields ; Ambipolar field ; Atmospheric escape ; Electric force ; Extraterrestrial measurements ; Ionospheric escape ; Polar wind ; Venus ; Planets
英文摘要: Understanding what processes govern atmospheric escape and the loss of planetary water is of paramount importance for understanding how life in the universe can exist. One mechanism thought to be important at all planets is an “ambipolar” electric field that helps ions overcome gravity. We report the discovery and first quantitative extraterrestrial measurements of such a field at the planet Venus. Unexpectedly, despite comparable gravity, we show the field to be five times stronger than in Earth's similar ionosphere. Contrary to our understanding, Venus would still lose heavy ions (including oxygen and all water-group species) to space, even if there were no stripping by the solar wind. We therefore find that it is possible for planets to lose heavy ions to space entirely through electric forces in their ionospheres and such an “electric wind” must be considered when studying the evolution and potential habitability of any planet in any star system. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977527880&doi=10.1002%2f2016GL068327&partnerID=40&md5=973e50dee49faeb3b62c6e15626418f5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10680
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: NASA Goddard Space Flight Center, Greenbelt, MD, United States

Recommended Citation:
Collinson G.A.,Frahm R.A.,Glocer A.,et al. The electric wind of Venus: A global and persistent “polar wind”-like ambipolar electric field sufficient for the direct escape of heavy ionospheric ions[J]. Geophysical Research Letters,2016-01-01,43(12).
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