地震地磁观测与研究2025，Vol.46Issue(2)：164-172,9.DOI:10.3969/j.issn.1003-3246.2025.02.019
中国境内地磁场长期变化趋势及影响
Long-term trend and impact of the geomagnetic field in China
摘要
Abstract
The Earth's magnetic field is stable in the short term,but in the long run,the accumulation will change more and more,and the results will have a profound impact on the living environment of human beings.In this paper,the main magnetic field model,IGRF,is used to calculate the geomagnetic field parameters of China's provincial capitals from 1590 to 2023,and then their variation rules are analyzed.The following conclusions are obtained:① The magnetic inclination angle continues to increase by about 15°—17° in the whole country,that is,the magnetization direction becomes steeper.② The east-west direction of China spans 75°—135°E,and the magnetic declination angle variation is divided into three types,the western magnetic declination angle is deflected from west to east,with a maximum amplitude of 19°,the magnetic declination angle in the middle of the country sways left and right,and the increase is small,with a maximum amplitude of 4°,and the eastern magnetic declination angle is deviated from east to west,with a maximum amplitude of 12°.③ The total geomagnetic field increases from south to north at the same time,with a small increase of about 4 000-5 000 nT in the north and a large increase of about 6 000-8 000 nT in the central and southern regions,and is centered in Xi'an.④ Based on the analysis of geomagnetic parameter variations,it can be inferred that the Earth's magnetic north pole is migrating rapidly toward Chinese territory along the 97°W—100°E longitudinal band.⑤ The continuous increase of the Earth's magnetic field may affect the ionosphere distribution,and then affect communication,climate,and other aspects.关键词
主磁场模型IGRF/地磁场长期变化/地磁参数Key words
main magnetic field model IGRF/long-term variation of the geomagnetic field/geomagnetic parameters引用本文复制引用
贺梅艳,强建科,孙嘉明,黄永刚,张雅坤,陆凯旋,邓超凡,张宇豪,李小强..中国境内地磁场长期变化趋势及影响[J].地震地磁观测与研究,2025,46(2):164-172,9.基金项目
紫金矿业集团有限公司资助项目(项目编号:1101-ZC-2023-00212) （项目编号:1101-ZC-2023-00212）
