首页 | 本学科首页   官方微博 | 高级检索  
     检索      

三维非均匀地幔中深源电场和磁场的谱理论(Ⅱ)——横向缓变摄动和极型场快速扩散
引用本文:马石庄.三维非均匀地幔中深源电场和磁场的谱理论(Ⅱ)——横向缓变摄动和极型场快速扩散[J].地球物理学报,1999(3).
作者姓名:马石庄
作者单位:中国科学院地球物理研究所!北京,100101
基金项目:国家杰出青年自然科学基金!49454006
摘    要:It is one of the classical problems in Earth′s electromagnetism that continuation of the observatory data of magnetic field into the conducting region. This paper built the coupling vector equations governing the poloidal, toroidal and potential fields in 3-D inhomogeneous conducting mantle. Considering the limitation on variable scale of inhomogeneities in global mantle from study of the Earth′s deep interior, a perturbation theory of gradually lateral variation was presented. It is unnecessary that the 1-D spherical symmetric distribution of electric conductivity as zero-degree approximation. Serving as a example of solvability of the zero-degree approximation, it was demonstrated how the gradually lateral variation of electric conductivity effect on anti-diffusive problem of poloidal field in Earth′s mantel.

关 键 词:导电地慢  横向不均匀  电磁场
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号