Nonlinear Stratified Spin-up with Applications to Oceanic Upwelling, Frontogenesis and Subduction

该项目解决了与海洋等旋转分层流体的自旋有关的两个问题。首先研究了由风应力旋度引起的埃克曼泵送与由埃克曼泵送产生的内部地转流涡度之间的非线性耦合效应。第二个问题涉及到埃克曼通量对埃克曼层水平密度梯度的平流所产生的对流和惯性不稳定性，以及这些不稳定性所产生的垂直混合。这项工作包括发展和研究这些现象的三维表示的分析和数值模型，以及在实验室中重现这些现象和测试理论和数值预测的实验。数值模拟将扩展到沿海上升流模型。这项工作建立在这些过程的二维理论和数值模型的基础上。

0095971/RhinesThe project addresses two questions associated with the spin-up of rotating, stratified fluids like the ocean. The first concerns the effect of nonlinear coupling between the Ekman pumping induced by wind stress curl and the vorticity of the interior geostrophic flow generated by the Ekman pumping. The second concerns the generation of convective and inertial instabilities by the advection of horizontal density gradients in the Ekman layer by Ekman fluxes, together with the vertical mixing these instabilities produce. The work consists of the development and study of analytical and numerical models of three-dimensional representations of these phenomena together with experiments to reproduce these phenomena in the laboratory and to test the theoretical and numerical predictions. Numerical simulations will be extended to a model of coastal upwelling. The work builds on two-dimensional theoretical and numerical models of these processes.