globalchange  > 气候减缓与适应
DOI: 10.1002/2014GL060289
论文题名:
Pickup ion measurements by MAVEN: A diagnostic of photochemical oxygen escape from Mars
作者: Rahmati A.; Cravens T.E.; Nagy A.F.; Fox J.L.; Bougher S.W.; Lillis R.J.; Ledvina S.A.; Larson D.E.; Dunn P.; Croxell J.A.
刊名: Geophysical Research Letters
ISSN: 0094-9938
EISSN: 1944-9669
出版年: 2014
卷: 41, 期:14
起始页码: 4812
结束页码: 4818
语种: 英语
英文关键词: atmospheric loss ; Mars ; MAVEN ; photochemical oxygen escape ; SEP ; solar wind pickup ions
Scopus关键词: Dissociation ; Ionosphere ; Ions ; Pickups ; Solar wind ; Mars ; MAVEN ; photochemical oxygen escape ; Pick-up ions ; SEP ; Oxygen ; ionization ; Martian atmosphere ; numerical model ; oxygen ; photochemistry ; solar wind
英文摘要: A key process populating the oxygen exosphere at Mars is the dissociative recombination of ionospheric O2 +, which produces fast oxygen atoms, some of which have speeds exceeding the escape speed and thus contribute to atmospheric loss. Theoretical studies of this escape process have been carried out and predictions made of the loss rate; however, directly measuring the escaping neutral oxygen is difficult but essential. This paper describes how energetic pickup ion measurements to be made near Mars by the SEP (Solar Energetic Particle) instrument on board the MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft can be used to constrain models of photochemical oxygen escape. In certain solar wind conditions, neutral oxygen atoms in the distant Martian exosphere that are ionized and picked up by the solar wind can reach energies high enough to be detected near Mars by SEP. © 2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904524969&doi=10.1002%2f2014GL060289&partnerID=40&md5=3ac212988911390d09320bd1a9f61e67
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7202
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作者单位: Department of Physics and Astronomy, University of Kansas, Lawrence, KS, United States

Recommended Citation:
Rahmati A.,Cravens T.E.,Nagy A.F.,et al. Pickup ion measurements by MAVEN: A diagnostic of photochemical oxygen escape from Mars[J]. Geophysical Research Letters,2014-01-01,41(14).
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