A Study of the Fluid Motion Occurring Near the Top of the Earth's Liquid Outer Core

该项目建议使用全球地磁数据作为输入观测数据，开发发生在地球液态外核顶部附近的流体流动的“第二代”模型。这里保留的惯常假设是：(I)地幔要么是绝缘体，要么是径向对称的弱导体；(Ii)地幔是球形环空；(Iii)岩心流体是无粘性和不可压缩的。将包括的新的、矿石的现实特征如下：岩心流动不稳定，岩心流体有限传导，以及输入的地磁场模型包含误差。这项工作将需要一系列步骤：完成基本理论，建立适当的地磁场模型，实施理论，以及根据所产生的流动模式进行解释和推断。

This project proposes to develop "second-generation" models of the fluid flow occurring near the top od the Earth's liquid outer core, using global geomagnetic data as the input observations. Customary assumptions, to be retained here, are that (i) the mantle is either an insulator, or a weak, radially symmetric conductor; (ii) the mantle is a spherical annulus; (iii) the core fluid is inviscid and incompressible. The new, ore realistic features to be included are the following: the core flow is unsteady, the core fluid is finitely conducting, and the input geomagnetic field model contains errors. The work will require a sequence of steps: completion of the basic theory, construction of an appropriate geomagnetic field model, implementation of the theory, and interpretation and inference from the resulting flow pattern.