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Compositional Variation of the Dayside Martian Ionosphere: Inference from Photochemical Equilibrium Computations

文献类型：期刊论文

作者Wu, Xiaoshu5,6; Cui, Jun4,5,6; Niu, Dandan1; Ren, Zhipeng2,3; Wei, Yong2,3
刊名ASTROPHYSICAL JOURNAL
出版日期2021-12-01
卷号923期号:1页码:30
ISSN号0004-637X
DOI10.3847/1538-4357/ac24fe
英文摘要The Martian ionosphere plays a crucial role in driving the interactions of the planet with solar photons and solar wind particles. The variations of the dayside Martian ionosphere with several controlling factors, including the solar extreme ultraviolet radiation, the background atmosphere, and the underlying thermal structure, have been the topic of extensive research in terms of electron distribution. In contrast, how the ionospheric composition varies has not been systematically investigated, a topic that is attempted in this study based on photochemical equilibrium computations performed at 100-200 km altitude, including a large number of reactions. Our calculations reveal the following compositional variations as natural outcomes of the ionospheric chemistry on Mars. (1) With increasing solar irradiance, the proportions of the majority of nonterminal ions are enhanced at the expense of reduced proportions of terminal ions, including O-2(+), HCO+, NO+, and H3O+. (2) At high electron temperatures, the proportion of NO+ is modestly reduced, whereas the proportions of the other species are nearly unaffected. (3) The response of the ionospheric composition to the upper atmospheric composition is complicated, showing the strong negative response of many trace ions to ambient CO2, O, and CO, as well as the strong positive response of protonated ions to H-2, nitrogen-bearing ions to N and N-2, water-group ions to H2O, and HO2+ to O-2. As an application of the model results, the recent ion measurements made on board the Mars Atmosphere and Volatile Evolution are used to provide hints about the realistic composition of the Martian upper atmosphere.
WOS关键词ELECTRON-DENSITY PROFILES ; PHOTOIONIZATION CROSS-SECTIONS ; TOPSIDE IONOSPHERE ; MAVEN OBSERVATIONS ; HYDROGEN ESCAPE ; MAGNETIC-FIELD ; SOLAR-FLARES ; WATER-VAPOR ; MARS ; ATMOSPHERE
资助项目National Science Foundation of China[42030201] ; National Science Foundation of China[41774186] ; National Science Foundation of China[41904154] ; National Science Foundation of China[41525015] ; National Science Foundation of China[41525016] ; Institute of Geology & Geophysics, Chinese Academy of Sciences (CAS)[IGGCAS-201904] ; CAS B-type Strategic Priority Program[XDB41000000] ; China's National Space Administration[D020105]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000728082100001
出版者IOP Publishing Ltd
资助机构National Science Foundation of China ; Institute of Geology & Geophysics, Chinese Academy of Sciences (CAS) ; CAS B-type Strategic Priority Program ; China's National Space Administration ; National Science Foundation of China ; Institute of Geology & Geophysics, Chinese Academy of Sciences (CAS) ; CAS B-type Strategic Priority Program ; China's National Space Administration ; National Science Foundation of China ; Institute of Geology & Geophysics, Chinese Academy of Sciences (CAS) ; CAS B-type Strategic Priority Program ; China's National Space Administration ; National Science Foundation of China ; Institute of Geology & Geophysics, Chinese Academy of Sciences (CAS) ; CAS B-type Strategic Priority Program ; China's National Space Administration
源URL[http://ir.iggcas.ac.cn/handle/132A11/102956]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Cui, Jun
作者单位1.Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China
6.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab PEARL, Zhuhai, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Xiaoshu,Cui, Jun,Niu, Dandan,et al. Compositional Variation of the Dayside Martian Ionosphere: Inference from Photochemical Equilibrium Computations[J]. ASTROPHYSICAL JOURNAL,2021,923(1):30.
APA Wu, Xiaoshu,Cui, Jun,Niu, Dandan,Ren, Zhipeng,&Wei, Yong.(2021).Compositional Variation of the Dayside Martian Ionosphere: Inference from Photochemical Equilibrium Computations.ASTROPHYSICAL JOURNAL,923(1),30.
MLA Wu, Xiaoshu,et al."Compositional Variation of the Dayside Martian Ionosphere: Inference from Photochemical Equilibrium Computations".ASTROPHYSICAL JOURNAL 923.1(2021):30.

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来源：地质与地球物理研究所

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