• 责任者：Chen Bin (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Gu Zuowen
• 刊名：Chinese Journal of Geophysics
• 出版年：2010
• 卷期：53(9)
• 关键词：地磁场长期变化 ; secular variations of geomagnetic field ; 中国 ; China
• 页码：p.2144-2154
• 图表：6 illus., 4 tables, 38 refs.
• 分类号：0400
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

Using the data of the geomagnetic diurnal means during 2000~2004 at 34 observatories in China, the authors calculated the mean annual change rates on the quiet days and all days, and the fitting annual change rates on the quiet days. The Taylor polynomial model and the spline model of the geomagnetic secular variation in China for epoch 2000.0~2005.0 were established, based on the above annual change rates. The similarity and difference between the Taylor polynomial model, the spline model and the secular variation model of International Geomagnetic Reference Field (IGRF-SV) were analyzed and discussed. The results show that the shape and the value of the Taylor polynomial model and the spline model for the geomagnetic secular variation in China are quite consistent, and their long-term trends are also consistent with IGRF-SV.