基于第十三代国际地磁参考场模型在中国区域特征分析与研究  

Regional characteristics analysis in China based on the 13th International Geomagnetic Reference Model

作　　者：张秀玲[1,2] 赵旭东 Zhang Xiuling;Zhao Xudong(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Beijing Baijiatuan Earth Sciences National Observation and Research Station,Beijing 100095,China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]北京白家疃地球科学国家野外科学观测研究站,北京100095

出　　处：《地震学报》2024年第1期120-128,共9页Acta Seismologica Sinica

基　　金：中国地震局地球物理研究所基本科研业务费专项(DQJB23Z02)资助。

摘　　要：根据最新的第十三代国际地磁参考场模型(IGRF13),计算了2015—2020年中国区域地磁场模型七要素长期变化速率,并在此基础上分析我国区域地磁场长期变化特征。通过分析计算我国28个地磁台的IGRF13模型值与实际地磁场的长期变化速率、差值及均方误差,结果显示:IGRF13模型所显示的地磁场长期变化与我国区域地磁场实际观测变化基本一致,但在局部区域也存在差异,IGRF13模型能够体现中国区域地磁场的特征。应用IGRF13模型数据时需要考虑局部区域与台站实际观测数据的误差。Based on the latest 13th International Geomagnetic Reference(IGRF13) Model,the long-term change rates of the seven elements of the regional geomagnetic model in China from 2015 to 2020 were calculated to analyze the long-term change characteristics of the geomagnetic field in China.By analyzing and calculating the long change rate,difference and mean square error between IGRF13 model values and the actual geomagnetic field of 28 geomagnetic stations in China,the results show that:The long-term variation of geomagnetic field shown by IGRF13 model is basically consistent with the actual observed variation of geomagnetic field in China,but there are also obvious differences.IGRF13 model can reflect the characteristics of geomagnetic field in China.When applying IGRF13 model data,the error between local area and actual observation data of the station should also be considered.

关 键 词：地磁参考场模型 等变线 平均年变率 长期变化速率 均方根误差 

分 类 号：P318.1[天文地球—固体地球物理学]