IGGCAS OpenIR  > 地球与行星物理院重点实验室
Joint establishment of the geomagnetic model for mainland China based on CHAMP satellite and surface vector data
Feng Yan1,2; Sun Han3; Jiang Yong1; An Zhen-Chang4; Jiang Yi1; Liu Bao-Jia1; Huang Ya2; Zhang Hua1; Wu Ye-Wen1
AbstractWe firstly made a pre-processing to vector data of magnetism from surface observational stations and CHAMP satellite, along with newest 12 Chinese Meridian Project observations; then put all data into a specific time point by the 12th generation International Reference Field (IGRF12) model. Moreover, the external fields that include the main field, ionospheric field, magnetospheric field, their induced field, and the weak toroidal magnetic field were respectively removed by IGRF12 and the 4th generation Comprehensive Model (CM4) models. Finally, the China lithospheric field (elements X, Y, Z and F) model (SCH2000) was created by the spherical cap harmonic model, and the China geomagnetic field (CGRF2000) was created by IGRF12. During the modeling process, the effects from the altitude term, the selection of truncation level and the control of boundary were seriously considered. In terms of comparison of the Root-Mean-Square (RMS) error and so on, the SCH2000 with degree 8 was thought to be an ideal joint model to describe the lithospheric field over China, which were also compared with models like SCH1936, CM4 and Taylor polynomial. We found that their results, to some degrees, are consistent.. In view of location and intensity, SCH2000 reflects the lithospheric field more precisely compared to other regional models. Some differences between SCH2000 and CM4 mainly result from the measuring data and truncation level. Comparison shows the variations with altitudes are close between SCH2000 and CM4. As for the distributions of magnetic fields, there is also a good consistence between CGRF2000 and IGRF12 models.
KeywordGeomagnetic field Joint modeling Spherical Cap Harmonic model Chinese Meridian project CHAMP satellite CM4 IGRF12
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000405160100002
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Document Type期刊论文
Corresponding AuthorFeng Yan
Affiliation1.Nanjing Univ Informat Sci & Technol, Inst Space Weather, Nanjing 210044, Peoples R China
2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China
3.Xintianyuan Inst Disaster Prevent & Reduct, Inner Mongolia 010051, Hohhot, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Feng Yan,Sun Han,Jiang Yong,et al. Joint establishment of the geomagnetic model for mainland China based on CHAMP satellite and surface vector data[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(7):2522-2533.
APA Feng Yan.,Sun Han.,Jiang Yong.,An Zhen-Chang.,Jiang Yi.,...&Wu Ye-Wen.(2017).Joint establishment of the geomagnetic model for mainland China based on CHAMP satellite and surface vector data.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(7),2522-2533.
MLA Feng Yan,et al."Joint establishment of the geomagnetic model for mainland China based on CHAMP satellite and surface vector data".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.7(2017):2522-2533.
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