NAOC Open IR
Solar and Magnetic Control of Minor Ion Peaks in the Dayside Martian Ionosphere
Huang, J. -P.1; Cui, J.1,2,3; Hao, Y. -Q.4; Guo, J. -P.5; Wu, X. -S.2,3; Niu, D. -D.6; Wei, Y.7
2020-08-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume125Issue:8Pages:15
AbstractThe Neutral Gas and Ion Mass Spectrometer of the Mars Atmosphere and Volatile Evolution provides a large data set to explore the ion composition and structure of the Martian ionosphere. Here, the dayside measurements are used to investigate the minor ion density profiles with distinctive peaks above 150 km, revealing a systematic trend of decreasing peak altitude with increasing ion mass. We specifically focus on a subset of species including O+, N-2(+)/CO+, C+, N+, He+, and O++, all of which are mainly produced via direct photoionization of parent neutrals. Our analysis reveals weak or no variation with solar zenith angle (SZA) in both peak density and altitude, which is an expected result because these ion peaks are located within the optically thin regions subject to the same level of solar irradiance independent of SZA. In contrast, the solar cycle variations of peak density and altitude increase considerably with increasing solar activity, as a result of enhanced photoionization frequency and atmospheric expansion at high solar activities. He+ serves as an exception in that its peak density increases toward large SZA and meanwhile shows no systematic variation with solar activity. The thermospheric He distribution on Mars should play an important role in determining these observed variations. Finally, the peak altitudes for all species are elevated by at least several km within the weakly magnetized regions, possibly attributable to the suppression of vertical diffusion by preferentially horizontal magnetic fields in these regions.
Funding OrganizationB-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China
DOI10.1029/2020JA028254
WOS KeywordELECTRON-DENSITY PROFILES ; MARS GLOBAL SURVEYOR ; MONOCHROMATIC RADIATION ; TOPSIDE IONOSPHERE ; MAVEN OBSERVATIONS ; ATMOSPHERE ; VARIABILITY ; ABSORPTION ; ANOMALIES ; VIKING
Language英语
Funding ProjectB-type Strategic Priority Program - Chinese Academy of Sciences[XDB41000000] ; pre-research project on Civil Aerospace Technologies - China's National Space Administration[D020105] ; National Science Foundation of China[41525015] ; National Science Foundation of China[41525016] ; National Science Foundation of China[41774186] ; National Science Foundation of China[41904154]
Funding OrganizationB-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China ; B-type Strategic Priority Program - Chinese Academy of Sciences ; B-type Strategic Priority Program - Chinese Academy of Sciences ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; pre-research project on Civil Aerospace Technologies - China's National Space Administration ; National Science Foundation of China ; National Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000577125000072
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81916
Collection中国科学院国家天文台
Corresponding AuthorCui, J.
Affiliation1.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab PEARL, Zhuhai, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei, Peoples R China
4.Beijing Univ, Sch Earth & Space Sci, Beijing, Peoples R China
5.Beijing Normal, Dept Astron, Beijing, Peoples R China
6.Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China
7.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Huang, J. -P.,Cui, J.,Hao, Y. -Q.,et al. Solar and Magnetic Control of Minor Ion Peaks in the Dayside Martian Ionosphere[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2020,125(8):15.
APA Huang, J. -P..,Cui, J..,Hao, Y. -Q..,Guo, J. -P..,Wu, X. -S..,...&Wei, Y..(2020).Solar and Magnetic Control of Minor Ion Peaks in the Dayside Martian Ionosphere.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,125(8),15.
MLA Huang, J. -P.,et al."Solar and Magnetic Control of Minor Ion Peaks in the Dayside Martian Ionosphere".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 125.8(2020):15.
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