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  4. 中国科学院地球与行星物理重点实验室
Natural Orthogonal Component Analysis of Daily Magnetic Variations at the Martian Surface: InSight Observations

文献类型：期刊论文

作者Luo, H.1,2; Du, A. M.1,2; Ge, Y. S.1,2; Johnson, C. L.3,4; Mittelholz, A.5; Zhang, Y.1,2; Sun, S. Q.1; Zhao, L.1; Yu, Y.1,2; Tian, L.1,2
刊名JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
出版日期2022-02-01
卷号127期号:2页码:15
关键词InSight diurnal magnetic variations natural orthogonal components
ISSN号2169-9097
DOI10.1029/2021JE007112
英文摘要Distinguishing different sources of magnetic field variations at InSight is important to understand dynamic processes in the Martian ionosphere as well as the coupling between the solar wind and the Martian induced magnetosphere. Recent studies based on magnetic field measurements from InSight have suggested that the daily and seasonal variations in the magnetic field at the Martian surface are at least partially the result of neutral wind-driven ionospheric dynamo currents and their seasonal variations. However, the sources of the daily variations with different time scales need be further investigated. In this paper, magnetic field variations in a sol as well as during nearly a whole Martian year from InSight observations were decomposed into their natural orthogonal components. We found that the first eigenmode shows the previously identified early to midmorning peak, and varies with season. This corresponds to the solar quiet variations. The second and higher eigenmodes manifest the quasi-Carrington and sub-Carrington rotation periodicity represent disturbed components that may be stimulated by variations in the draped interplanetary magnetic field and/or the Martian ionospheric electron density. Different from their counterparts at the Earth, the amplitude of the first eigenmode is comparable with the sum of second to fifth ones, showing that the quiet and disturbed diurnal variations contribute similarly to the total diurnal variation. Decomposition of Martian surface magnetic field variations could provide monitoring of the Martian ionospheric current system as well as the solar wind conditions in the near-Mars space, which will be greatly enhanced when combined with Zhurong Martian surface field measurements in the future.
WOS关键词MARS ; IONOSPHERE ; VARIABILITY ; FIELD ; MODEL ; SQ
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB41010304] ; Beijing Municipal Science and Technology Commission[Z191100004319001] ; pre-research Project on Civil Aerospace Technologies - CNSA[D020103] ; National Natural Science Foundation of China[41874080] ; National Natural Science Foundation of China[41674168] ; National Natural Science Foundation of China[41874197] ; ETH[19-2 FEL-34]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000765623000009
出版者AMER GEOPHYSICAL UNION
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; pre-research Project on Civil Aerospace Technologies - CNSA ; pre-research Project on Civil Aerospace Technologies - CNSA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; ETH ; ETH ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; pre-research Project on Civil Aerospace Technologies - CNSA ; pre-research Project on Civil Aerospace Technologies - CNSA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; ETH ; ETH ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; pre-research Project on Civil Aerospace Technologies - CNSA ; pre-research Project on Civil Aerospace Technologies - CNSA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; ETH ; ETH ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; pre-research Project on Civil Aerospace Technologies - CNSA ; pre-research Project on Civil Aerospace Technologies - CNSA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; ETH ; ETH
源URL[http://ir.iggcas.ac.cn/handle/132A11/105053]  
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Luo, H.; Ge, Y. S.
作者单位1.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
3.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada
4.Planetary Sci Inst, Tucson, AZ USA
5.Swiss Fed Inst Technol, Dept Earth Sci, Zurich, Switzerland
推荐引用方式
GB/T 7714		 Luo, H.,Du, A. M.,Ge, Y. S.,et al. Natural Orthogonal Component Analysis of Daily Magnetic Variations at the Martian Surface: InSight Observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,2022,127(2):15.
APA Luo, H..,Du, A. M..,Ge, Y. S..,Johnson, C. L..,Mittelholz, A..,...&Xu, W. Y..(2022).Natural Orthogonal Component Analysis of Daily Magnetic Variations at the Martian Surface: InSight Observations.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,127(2),15.
MLA Luo, H.,et al."Natural Orthogonal Component Analysis of Daily Magnetic Variations at the Martian Surface: InSight Observations".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 127.2(2022):15.

入库方式： OAI收割

来源：地质与地球物理研究所

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