Studies of Buoyant Magnetostrophic Flow

罗珀9417481拟议的研究由两个相关的项目组成，涉及地核中的小规模浮力磁转流。第一个项目有两个互补的动机：更好地了解观测到的长期变化与外核最上部的动力学状态之间的关系，以及研究刚性边界的存在是否会破坏浮力驱动的流动的对称性，并产生螺旋度和阿尔法效应。采用双重傅立叶变换，在斜Caresian坐标系中求解线性化的动量方程和磁扩散方程，即可求出由给定浮力分布驱动的流动和场。第二个项目将寻求确定小规模可变形浮动块在核心中的平衡形状和大小，以及它们的上升速度。线性化的动量方程和磁扩散方程。****

Loper 9417481 The proposed research consists of two related projects dealing with small-scale buoyant magnetostrophic flow in the Earth's core. The first project has two complementary motivations: to understand better the relation between the observed secular variation and the dynamical state of the uppermost portion of the outer core and to investigate whether the presence of a rigid boundary can break the symmetry of the buoyancy-driven flow and generate helicity and an alpha effect. The flow and field driven by a prescribed buoyancy distribution will be found by solving the linearized momentum and magnetic-diffusion equations in an oblique Caresian coordinate system using a double Fourier transform. The second project will seek to determine the equilibrium shape and size of small-scale deformable buoyant parcels in the core, as well as their rise velocity. The linearized momentum and magnetic-diffusion equation. ****