Observational Constraints on Theories of the Geodynamo

PI将使用时变磁场的知识 在核幔边界，以进一步了解 长期变化的运动学和动力学，并提供 对地球发电机理论的有用限制。 特别是，他 将在三个方面开展工作：1）继续开展工作， 开发更可靠的方法来确定 核心顶部的流体流动，最初的目的是确认 关于流动动力学的最新初步发现; 2） 正演模拟技术的延续提供了简单的 解释在磁场中观察到的现象; 3）和 对磁场中观察到的波动现象的研究 领域，以及分离波的新技术的发展 从背景场。

The PI will use knowledge of the time-varying magnetic field at the core-mantle boundary to further the understanding of the kinematics and dynamics of the secular variation, and to provide useful constraints on theories of the geodynamo. Specially, he will work in three areas: 1) the continuation of work on developing more reliable methods of determining the pattern of fluid flow at the top of the core, aiming, initially, to confirm recent tentative findings concerning the dynamics of the flow; 2) the continuation of forward modeling techniques providing simple explanations of observed phenomena in the magnetic field; 3) and the investigation of wave-like phenomena observed in the magnetic field, and the development of new techniques for separating waves from the background field.