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[1]王振东,王 粲,袁洁浩,等.中国及邻近地区地磁长期变化分析*[J].地震研究,2019,42(01):103-111.
　WANG Zhendong,WANG Can,YUAN Jiehao,et al.Analysis of Geomagnetic Secular Variation in China and Its Neighboring Regions[J].Journal of Seismological Research,2019,42(01):103-111.
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中国及邻近地区地磁长期变化分析*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
42
期数:
2019年01期
页码:
103-111
栏目:
出版日期:
2019-04-20

文章信息/Info

Title:
Analysis of Geomagnetic Secular Variation in China and Its Neighboring Regions
作者:
王振东; 王 粲; 袁洁浩; 毛丰龙
(中国地震局地球物理研究所,北京 100081)
Author(s):
WANG Zhendong; WANG Can; YUAN Jiehao; MAO Fenglong
(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
关键词:
地磁场;  长期变化;  IGRF;  CHAOS;  中国及邻近地区
Keywords:
geomagnetic field;  secular variation;  IGRF;  CHAOS;  China and its neighboring regions
分类号:
P315.721
DOI:
-
摘要:
利用2010.0—2016.0年中国国际地磁交换台站和中国邻近地区共14个地磁台站的X,Y,Z分量观测数据,结合世界资料中心发布的静扰日数据,计算了台站十日静日午夜均值,并进行三次多项式拟合,得到X,Y,Z分量的长期变化和年变率。同时,利用CHAOS-6和IGRF-12模型计算了2010.0—2016.0年F分量的长期变化,分别得到了CHAOS-6及IGRF-12模型计算值与台站观测值的差值。结果表明:同一地区的台站X,Y,Z分量变化趋势基本一致; Z分量的平均年变率与X,Y分量相比偏大; CHAOS-6和IGRF-12模型描述的F分量的长期变化与台站观测值之间的差值的绝对值分别为4.8～253.7 nT和0.9～420.0 nT。产生上述误差的原因主要是CHAOS-6和IGRF-12模型是描述全球地磁场的模型,而地磁场及其长期变化具有显著的区域特征和局部特征。
Abstract:
Using the observation data(X,Y,Z components of geomagnetic field)of 4 China international geomagnetic exchange observatories and 10 geomagnetic observatories in China's neighboring regions during the period 2010.0—2016.0,and combining with the quietest and most disturbed data released by the World Data Center,we calculated the mean values at the midnight of every 10 days in the above observatories,which is fitted with cubic polynomial so as to obtain the analysis of geomagnetic secular variation and annual variation of X,Y,Z components of geomagnetic field. At the same time,using the CHAOS-6 model and the IGRF-12 model,we calculated the geomagnetic secular variation of the F component during the period 2010.0—2016.0,and obtained the difference between the calculated values of the CHAOS-6 and IGRF-12 models and the observed values of observatories respectively. The result shows that the variation trends of X,Y,Z components of observatories are basically consistent in the same area,and the average annual variability of the Z component is larger than that of the X,Y components. The absolute values of the difference between geomagnetic secular variation of the F component described by the CHAOS-6 and IGRF-12 models and the observed values of observatories are 4.8～253.7 nT and 0.9～420.0 nT,respectively. The main reason for the above error is that the CHAOS-6 model and the IGRF-12 model describ the global geomagnetic field,while the geomagnetic field and its secular variations have significant regional and local characteristics.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-05-29
基金项目:中国地震局地球物理研究所基本科研业务费专项“与地下应力状态相关的局部岩石圈磁场变化实验研究”(DQJB16B04)资助.

更新日期/Last Update: 2019-04-25