| 菲律宾及其邻近地区的地磁场模型研究 |
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| 引用本文： | 狄传芝,顾左文,Bernardo M. Soriano,陈斌,Carina G. Lao,张毅,辛长江,高金田.菲律宾及其邻近地区的地磁场模型研究[J].地球物理学报,2011,54(8):2085-2092. |
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| 作者姓名： | 狄传芝 顾左文 Bernardo M. Soriano 陈斌 Carina G. Lao 张毅 辛长江 高金田 |
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| 作者单位： | 1. 中国地震局地球物理研究所,北京 100081;
2. 安徽省地震局工程院,合肥 230031;
3. 甘肃省地震局兰州观象台,兰州 730046;
4. 菲律宾大气和地球物理与空间科学处 |
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| 基金项目： | 科技基础性工作专项2008年度项目"2010.0年代中国地磁图编制"(2008FY220100)资助. |
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| 摘 要： | 根据2001～2007年期间在菲律宾境内测量的74个点的地磁场数据,利用球冠谐和、泰勒多项式两种方法建立了2005.0菲律宾及周边地区地磁基本场模型,得到了菲律宾地区X、y、Z、D、I、H、F七个分量的分布.两种模型反映的同一地区的地磁场分布形态基本类似,只在拐点的舒缓度、等值线平滑度等方面存在区别.在8°N左右,X、...
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| 关 键 词： | 菲律宾地区 地磁场 球冠谐模型 泰勒多项式模型 |
| 收稿时间： | 2010-07-26 |
The study of magnetic field models for Philippines and its neighboring regions |
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| DI Chuan-Zhi,GU Zuo-Wen,Bernardo M. Soriano,CHEN Bin,Carina G. Lao,ZHANG Yi,XIN Chang-Jiang,GAO Jin-Tian.The study of magnetic field models for Philippines and its neighboring regions[J].Chinese Journal of Geophysics,2011,54(8):2085-2092. |
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| Authors: | DI Chuan-Zhi GU Zuo-Wen Bernardo M Soriano CHEN Bin Carina G Lao ZHANG Yi XIN Chang-Jiang GAO Jin-Tian |
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| Institution: | 1. Geophysical Institute of China Earthquake Administration, Beijing 100081, China;
2. Academy of Engineering of Anhui Earthquake Bureau, Hefei 230031, China;
3. Lanzhou Observatory of Gansu Earthquake Bureau, Lanzhou 730046, China;
4. Philippine Atmospheric, Geophysical and Astronomical Services Administration(PAGASA), Philippines |
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| Abstract: | According to the magnetic field data at 74 survey sites measured in the Philippines during 2001~2007, and using two methods of spherical cap harmonic and Taylor polynomial, we established magnetic field model on 2005.0 epoch for Philippines and the surrounding regions and got the distribution of the seven components of X, Y, Z, D, I, H, F. The distribution is similar in the two models, the difference is in the relief of inflection point and contour smoothness. At about 8°N, X, H, F have turning point and they are higher in west than in east. D, Y zero line extends approximately along latitude 8°N, the northern side of the line is negative and the southern part is positive, while the distribution of the contours is along the longitude direction, with minor variation along latitude direction. The distribution of Z and I is more regular, the zero-line is along 7.5°N, and the value is positive in northern region and negative in southern regions. The distribution patterns of the difference between the two models with the IGRF are very different, the value of spherical harmonic model minus IGRF model revealed a feature of alternative positive and negative anomalies, and the maximum positive and negative anomaly value of each component is in low latitudes. The anomaly distribution of Taylor minus IGRF is smoother. |
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| Keywords: | Philippines region Magnetic field Spherical harmonic model Taylor model |
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