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Ablation of Venusian oxygen ions by unshocked solar wind

文献类型：期刊论文

作者Wei, Yong1,5,6; Fraenz, Markus2; Dubinin, Edward2; Wan, Weixing1,5; Zhang, Tielong3; Rong, Zhaojin1,5; Chai, Lihui1,5; Zhong, Jun1; Zhu, Rixiang1,5; Futaana, Yoshifumi4
刊名SCIENCE BULLETIN
出版日期2017-12-30
卷号62期号:24页码:1669-1672
ISSN号2095-9273
关键词Venus Ion Escape Planetary Habitability
DOI10.1016/j.scib.2017.11.006
文献子类Article
英文摘要As an Earth-like planet Venus probably had a primordial dipole field for several million years after formation of the planet. Since this dipole field eventually vanished the ionosphere of Venus has been exposed to the solar wind. The solar wind is shocked near Venus, and then scavenges the ionospheric particles through the magnetosheath and the magnetotail. The escape rate of oxygen ions (O+) estimated from spacecraft observations over the past several decades has manifested its importance for the evolution of planetary habitability, considering the accumulated effect over the history of Venus. However, all the previous observations were made in the shocked solar wind and/or inside the wake, though some simulations showed that unshocked solar wind can also ablate O+ ions. Here we report Venus Express observations of O+ ions in the unshocked solar wind during the solar minimum. The observations suggest that these O+ ions are accelerated by the unshocked solar wind through pickup processes. The estimated O+ escape rate, 2.1 x 10(24) ions/s, is comparable to those measured in the shocked solar wind and the wake. This escape rate could result in about 2 cm global water loss over 4.5 billion years. Our results suggest that the atmospheric loss at unmagnetized planets is significantly underestimated by previous observations, and thus we can emphasize the importance of an Earth-like dipole for planetary habitability. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
WOS关键词ATMOSPHERIC EROSION ; PLASMA ENVIRONMENT ; MAGNETIC-FIELDS ; EXPRESS ; ESCAPE ; MARS ; EVOLUTION ; EARTH
WOS研究方向Science & Technology - Other Topics
语种英语
出版者SCIENCE PRESS
WOS记录号WOS:000418893800013
资助机构Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41621004) ; 41621004) ; 41621004) ; 41621004) ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41621004) ; 41621004) ; 41621004) ; 41621004) ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41621004) ; 41621004) ; 41621004) ; 41621004) ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; National Natural Science Foundation of China(41525016 ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Grant within the Planetary Magnetism Priority Program of the Deutsche Forschungsgemeinschaft(WO910/3-1) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; German Aerospace Agency(50QM0801) ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41621004) ; 41621004) ; 41621004) ; 41621004)
源URL[http://ir.iggcas.ac.cn/handle/132A11/82388]  
专题中国科学院地质与地球物理研究所
通讯作者Wei, Yong
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Max Planck Inst Solar Syst Res, D-37077 Gottingen, Germany
3.Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria
4.Swedish Inst Space Phys, SE-98128 Kiruna, Sweden
5.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Yong,Fraenz, Markus,Dubinin, Edward,et al. Ablation of Venusian oxygen ions by unshocked solar wind[J]. SCIENCE BULLETIN,2017,62(24):1669-1672.
APA Wei, Yong.,Fraenz, Markus.,Dubinin, Edward.,Wan, Weixing.,Zhang, Tielong.,...&Barabash, Stas.(2017).Ablation of Venusian oxygen ions by unshocked solar wind.SCIENCE BULLETIN,62(24),1669-1672.
MLA Wei, Yong,et al."Ablation of Venusian oxygen ions by unshocked solar wind".SCIENCE BULLETIN 62.24(2017):1669-1672.

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来源：地质与地球物理研究所

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