A Spherical Harmonic Martian Crustal Magnetic Field Model Combining Data Sets of MAVEN and MGS
文献类型：期刊论文
| 作者 | Gao, J. W.1,2,4; Rong, Z. J.1,2,4; Klinger, Lucy3; Li, X. Z.1,2,4; Liu, D.1,2,4; Wei, Y.1,2,4 |
| 刊名 | EARTH AND SPACE SCIENCE
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 8期号:10页码:21 |
| 关键词 | Martian crustal magnetic field spherical harmonic model least squares measure 2-norm internal magnetic field |
| DOI | 10.1029/2021EA001860 |
| 英文摘要 | This study presents a new spherical harmonic (SH) model of the crustal magnetic field of Mars, based on the magnetic field data set measured by the Mars Global Surveyor (MGS) and the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. To minimize the influence of external fields due to solar wind interaction with Mars, we rejected data that were observed dayside and above an altitude of 500 km. The data points of MAVEN were reduced by using a proxy of solar wind activity that identified and rejected any data measured during magnetically disturbed intervals. We used a conventional least squares technique to estimate the Gauss coefficients fitted to the reduced data set and made a compromise between model misfit and model roughness by truncating the SH model at degree 110. This model is capable of representing crustal fields with a spatial resolution approaching similar to 200 km at 120 km altitude and similar to 260 km at the Martian surface. Since our model fits MAVEN's observational data better than previous models, especially the data obtained during MAVEN's low altitude periapsis passes, we conclude that it may more accurately approximate the low-altitude crustal field. We calculate the crustal field power spectrum of various models and find that small-scale fields at low altitudes were underestimated by most previous models. This new model could benefit future studies associated with the Martian crustal field and its interaction with the solar wind. |
| WOS关键词 | GEOMAGNETIC-FIELD ; MARS ; PLASMA ; MAP |
| 资助项目 | National Natural Science Foundation of China[41922031] ; National Natural Science Foundation of China[41774188] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA17010201] ; Key Research Program of the Institute of Geology & Geophysics, CAS[IGGCAS-201904] |
| WOS研究方向 | Astronomy & Astrophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000711969700024 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/103787]  |
| 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 | Rong, Z. J. |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Chinese Acad Sci, Mohe Observ Geophys, Inst Geol & Geophys, Beijing, Peoples R China 3.Peking Univ, Beijing Int Ctr Math Res, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, J. W.,Rong, Z. J.,Klinger, Lucy,et al. A Spherical Harmonic Martian Crustal Magnetic Field Model Combining Data Sets of MAVEN and MGS[J]. EARTH AND SPACE SCIENCE,2021,8(10):21. |
| APA | Gao, J. W.,Rong, Z. J.,Klinger, Lucy,Li, X. Z.,Liu, D.,&Wei, Y..(2021).A Spherical Harmonic Martian Crustal Magnetic Field Model Combining Data Sets of MAVEN and MGS.EARTH AND SPACE SCIENCE,8(10),21. |
| MLA | Gao, J. W.,et al."A Spherical Harmonic Martian Crustal Magnetic Field Model Combining Data Sets of MAVEN and MGS".EARTH AND SPACE SCIENCE 8.10(2021):21. |
入库方式： OAI收割
来源：地质与地球物理研究所
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