Advances for 3-D Magnetotelluric Modeling

自然感应电磁场（大地磁场）高度依赖于地球的垂直和水平电导率结构，并且受三维特征的影响很大。三维大地电磁建模算法对于正确解释观测数据至关重要，但当前的算法在计算上昂贵且耗时。本提案的目标是开发三维大地电磁建模算法，该算法可以模拟完全非均匀的地球模型，并且可以快速地在现代科学工作站上运行。通过本项目开发的算法将使用共轭方向松弛算法，加上适当的前置条件和多重缩放技术。

Naturally induced electromagnetic fields (magnetotelluric fields) are highly dependent on both the vertical and horizontal conductivity structure of the earth and are greatly influenced by three-dimensional features. Three-dimensional magnetotelluric modeling algorithms are critical for correctly interpreting observed data, but the current generation of algorithms are computationally expensive and time-consuming. The objective of this proposal is to develop three-dimensional magnetotelluric modeling algorithms that can model fully inhomogeneous earth models and that are quick and can be run on modern scientific workstations. The algorithm to be developed through this project will use conjugate direction relaxation algorithms coupled with appropriate preconditioners and a multiple scaling technique.