A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field
The Earth’s magnetic field, which has been extensively observed from ground to satellite altitudes over several decades, originates from multiple sources, such as the core dynamo, the conductive mantle, the magnetized lithosphere, and the space current systems. Modeling of the lithospheric contribut...
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| Format: | Article |
| Language: | English |
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Science Press
2025-05-01
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| Series: | Earth and Planetary Physics |
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| Online Access: | http://www.eppcgs.org/article/doi/10.26464/epp2025064?pageType=en |
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| _version_ | 1850196839492485120 |
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| author | Liang Yin JiaXuan Zhang PengFei Liu HongBo Yao Pan Zhang JinSong Du |
| author_facet | Liang Yin JiaXuan Zhang PengFei Liu HongBo Yao Pan Zhang JinSong Du |
| author_sort | Liang Yin |
| collection | DOAJ |
| description | The Earth’s magnetic field, which has been extensively observed from ground to satellite altitudes over several decades, originates from multiple sources, such as the core dynamo, the conductive mantle, the magnetized lithosphere, and the space current systems. Modeling of the lithospheric contribution plays an important role in the geophysical studies and industrial applications. In this paper, we propose a new method for global and regional modeling of the lithospheric magnetic field based on the cubed-sphere. An equivalent dipole source method on a quasi-uniform cubed-sphere grid is employed in the forward modeling. The dipole directions are fixed according to a priori magnetization and the relative intensities are estimated by an inversion procedure of least-squares fitting with minimum model regularization. Several numerical tests are performed to validate the accuracy and efficiency of both forward modeling and inversion procedure. The proposed method is applied to the global and regional modeling based on the latest magnetic data from Swarm Alpha satellite and MSS-1 mission. The model results indicate that the proposed method works quite well for realistic satellite data and MSS-1 data is consistent with the Swarm data in terms of lithospheric field modeling. |
| format | Article |
| id | doaj-art-96c954d4f0334de4817c87df2aa1f09d |
| institution | OA Journals |
| issn | 2096-3955 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Science Press |
| record_format | Article |
| series | Earth and Planetary Physics |
| spelling | doaj-art-96c954d4f0334de4817c87df2aa1f09d2025-08-20T02:13:20ZengScience PressEarth and Planetary Physics2096-39552025-05-019362263410.26464/epp2025064RA622-yinliang-FA cubed-sphere based method for global and regional modeling of the lithospheric magnetic fieldLiang Yin0JiaXuan Zhang1PengFei Liu2HongBo Yao3Pan Zhang4JinSong Du5Macau Institute of Space Technology and Application, Macau University of Science and Technology, Macao 999078, ChinaMacau Institute of Space Technology and Application, Macau University of Science and Technology, Macao 999078, ChinaMacau Institute of Space Technology and Application, Macau University of Science and Technology, Macao 999078, ChinaMacau Institute of Space Technology and Application, Macau University of Science and Technology, Macao 999078, ChinaHubei Subsurface Multi-scale Imaging Key Laboratory, School of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, ChinaHubei Subsurface Multi-scale Imaging Key Laboratory, School of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, ChinaThe Earth’s magnetic field, which has been extensively observed from ground to satellite altitudes over several decades, originates from multiple sources, such as the core dynamo, the conductive mantle, the magnetized lithosphere, and the space current systems. Modeling of the lithospheric contribution plays an important role in the geophysical studies and industrial applications. In this paper, we propose a new method for global and regional modeling of the lithospheric magnetic field based on the cubed-sphere. An equivalent dipole source method on a quasi-uniform cubed-sphere grid is employed in the forward modeling. The dipole directions are fixed according to a priori magnetization and the relative intensities are estimated by an inversion procedure of least-squares fitting with minimum model regularization. Several numerical tests are performed to validate the accuracy and efficiency of both forward modeling and inversion procedure. The proposed method is applied to the global and regional modeling based on the latest magnetic data from Swarm Alpha satellite and MSS-1 mission. The model results indicate that the proposed method works quite well for realistic satellite data and MSS-1 data is consistent with the Swarm data in terms of lithospheric field modeling.http://www.eppcgs.org/article/doi/10.26464/epp2025064?pageType=engeomagnetic satellitelithospheric magnetic fieldcubed-sphere gridforward modelinginversion |
| spellingShingle | Liang Yin JiaXuan Zhang PengFei Liu HongBo Yao Pan Zhang JinSong Du A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field Earth and Planetary Physics geomagnetic satellite lithospheric magnetic field cubed-sphere grid forward modeling inversion |
| title | A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field |
| title_full | A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field |
| title_fullStr | A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field |
| title_full_unstemmed | A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field |
| title_short | A cubed-sphere based method for global and regional modeling of the lithospheric magnetic field |
| title_sort | cubed sphere based method for global and regional modeling of the lithospheric magnetic field |
| topic | geomagnetic satellite lithospheric magnetic field cubed-sphere grid forward modeling inversion |
| url | http://www.eppcgs.org/article/doi/10.26464/epp2025064?pageType=en |
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