The propagation and breaking of topographically generated internal waves in the ocean

0854131 Vanderhoff海洋内波的地形生成、传播和破碎是海洋混合过程的重要组成部分，海洋混合过程有助于海洋的总体环流、热量和气体与大气的交换以及污染物和营养物的扩散。该项目旨在开发建模工具，进行模拟并与观测数据进行比较，以了解海洋中内波地形生成的动力学，这些波如何在具有垂直变化密度和切变的现实海洋环境中传播，进一步了解这些短内波如何向破碎和消散演变的微妙过程，以及如何量化和参数化破碎的耗散和混合效应。所使用的主要方法将是最近开发的混合射线追踪技术，这种技术可以有效计算内波在现实海洋环境中的传播，包括计算波的振幅，并消除或尽量减少对射线奇异点的校正。模拟将与海洋观测密切协调，特别是与国家海洋基金会赞助的夏威夷海洋混合实验期间获得的数据密切协调，这些数据涉及海底地形产生内波及其随后的传播。这项调查将使研究生和本科生能够在海洋学、内波理论、射线方法、数据分析和大规模数值模拟技术的概念和实践方面得到资助和培训。

0854131VanderhoffThe topographic generation, propagation and breaking of oceanic internal waves is an essential part of the ocean mixing processes that contribute to the general circulation of the ocean, the exchange of heat and gasses with the atmosphere, and the dispersal of pollutants and nutrients. This project aims to develop modeling tools, perform simulations and compare with observational data to understand the dynamics of the topographic generation of internal waves in the ocean, how these waves propagate through a realistic ocean environment with vertically varying density and shear, gain additional insight into the subtle processes of how these short internal waves evolve toward breaking and dissipation, and how to quantify and parameterize the dissipation and mixing effects of breaking. The primary methods used will be recently developed hybrid ray-tracing techniques that allow the efficient calculation of the propagation of internal waves through a realistic ocean environment, including the calculation of wave amplitudes, and that eliminate or minimize the need for corrections at ray singularities. The simulations will be closely coordinated with ocean observations, specifically with data obtained during the NSF-sponsored Hawaiian Ocean Mixing Experiment, of the generation of internal waves by ocean bottom topography and their subsequent propagation. This investigation will allow for funding and training of graduate and undergraduate students in the concepts and practice of oceanography, internal wave theory, ray methods, data analysis and large-scale numerical simulation techniques.