Collaborative Research: The internal Surfzone: Wave-averaged circulation driven by nonlinear internal waves shoaling over spatially-varying bathymetry

合作研究：内部冲浪区：由非线性内波浅滩驱动的波平均环流在空间变化的测深中

• 批准号: 1558978
• 负责人: Alberto Scotti
• 金额: $ 30.41万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-02-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1558978&HistoricalAwards=false
• 关键词: Collaborative; Research; internal; Surfzone; Wave

Transport by nonlinear internal waves in coastal regions has strong interdisciplinary ties to biological oceanography through transport of plankton and nutrients; geological and geochemical oceanography via transport of sediments; and coastal engineering/management via transport and dispersion of anthropogenic materials such as effluent from sewage outfalls. The overall objectives of this study are to understand the dynamics governing the flux of momentum from shoaling nonlinear internal waves to mean currents; the scale and structure of mean flows driven by shoaling internal waves under idealized conditions; and the magnitude and spatial structure of the net mass transport associated with the shoaling internal waves. Despite the ubiquitous nature of nonlinear internal waves in the coastal ocean, very few three dimensional studies exist that include variability of the topography in the direction normal to propagation. This study represents the first attempt to quantify the transport pathways forced by internal waves and the mean flows generated by them and it is expected to produce results and methodologies with broad applicability in interdisciplinary oceanography and coastal management. The project will support the professional development of a postdoctoral researcher and a graduate student. The approach is based on a state of the art, three-dimensional, non-hydrostatic numerical model with adaptive mesh capabilities. In addition, data previously collected in Massachusetts Bay during previous studies will be analyzed. This is the first study to systematically address the mean flow and transport driven by nonlinear internal waves shoaling over bathymetry varying in two dimensions. The study comprises two components: a modeling component used to study the transfer of momentum and water mass transport in a variety of situations of increasing realism, and a data-analysis component which will consider the same problem using the extensive dataset available from a series of experiments conducted in Massachusetts Bay over the last 16 years. The modeling component will be used to aid in interpreting the data. The model (Stratified Ocean Model with Adaptive Refinement), developed in part with funding from previous National Science Foundation proposals, is a state-of-the-art three-dimensional non-hydrostatic stratified ocean model which employs adaptive mesh refinement to effectively use the computational resources, increasing resolution on demand where necessary.

沿海地区非线性内波运输通过浮游生物和营养物质的运输与生物海洋学有着牢固的跨学科关系。地质和地球化学海洋学通过沉积物的运输；和沿海工程/管理，通过运输和分散人为材料，例如污水排出的废水。这项研究的总体目标是了解从浅滩非线性内波到平均电流的动量助焊剂的动力学；在理想化的条件下，由浅滩的内波驱动的平均流量的规模和结构；以及与浅滩内波相关的净质量转运的大小和空间结构。尽管沿海海洋中非线性内波的无处不在，但很少有三维研究包括在正常与传播方向上的地形变异性。这项研究代表了量化内部波和它们产生的平均流量强迫的运输途径的首次尝试，并有望在跨学科海洋学和沿海管理中产生广泛适用性的结果和方法。该项目将支持博士后研究人员和研究生的专业发展。该方法基于具有自适应网格功能的三维，非静态数值模型。此外，将分析先前在马萨诸塞州湾的研究期间收集的数据。 这是第一个系统地解决的研究，以系统地解决在两个维度上有变化的无线性内波板条驱动的平均流量和运输。该研究包括两个组成部分：用于研究在越来越多的现实主义情况下的各种情况下的动量和水质量转运的转移的建模组件，以及在过去16年中在马萨诸塞州湾进行的一系列实验中获得的广泛数据集将考虑相同的问题。建模组件将用于帮助解释数据。该模型（具有自适应改进的分层海洋模型）是由先前的国家科学基金会提案提供的资金开发的，是一种最先进的三维非静态分层海洋模型，它采用自适应网状精炼来有效地使用计算资源，在必要时根据需要提高解决方案。