Compositional Variation of the Dayside Martian Ionosphere: Inference from Photochemical Equilibrium Computations
Compositional Variation of the Dayside Martian Ionosphere: Inference from Photochemical Equilibrium Computations
复制标题
白天火星电离层的成分变化：光化学平衡计算的推论
DOI：
10.3847/1538-4357/ac24fe
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发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
Wei Yong
中科院分区：
文献类型：
--
作者：
Wu Xiaoshu;Cui Jun;Niu D;an;Ren Zhipeng;Wei Yong
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 O2+ , 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 H2, nitrogen-bearing ions to N and N2, water-group ions to H2O, and HO2+ to O2. 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.
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影响因子：
2.4
作者：
H. Rishbeth;M. Mendillo
通讯作者：
H. Rishbeth;M. Mendillo
影响因子：
3.2
作者：
V. Krasnopolsky
通讯作者：
V. Krasnopolsky
影响因子：
10.3
作者：
E. Nielsen;H. Zou;D. Gurnett;D. Kirchner;D. Morgan;R. Huff;R. Orosei;A. Safaeinili;J. Plaut;G. Picardi
通讯作者：
E. Nielsen;H. Zou;D. Gurnett;D. Kirchner;D. Morgan;R. Huff;R. Orosei;A. Safaeinili;J. Plaut;G. Picardi
影响因子：
3.2
作者：
V. Krasnopolsky
通讯作者：
V. Krasnopolsky
DOI：
10.1063/1.5011195
发表时间：
2018-02
期刊：
The Journal of chemical physics
影响因子：
--
作者：
Jake E. Tenewitz;Trí Lê;Oscar E. Martínez;S. Ard;N. Shuman;J. C. Sanchez;A. Viggiano;Joshua J Melko
通讯作者：
Jake E. Tenewitz;Trí Lê;Oscar E. Martínez;S. Ard;N. Shuman;J. C. Sanchez;A. Viggiano;Joshua J Melko