Collaborative Research: Tidal internal waves that propagate along the coast: Determining how they are generated and how far they travel

合作研究:沿着海岸传播的潮汐内波:确定它们是如何产生的以及它们传播的距离

基本信息

  • 批准号:
    1756752
  • 负责人:
  • 金额:
    $ 29.89万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-05-01 至 2023-04-30
  • 项目状态:
    已结题

项目摘要

Tidal internal waves arise from the interaction of the surface tide with topography, with their generation, propagation and dissipation forming a key pathway for tidal energy in the ocean. Internal tides can constitute a dominant energy source on continental shelves, where they can lead to processes such as soliton generation, turbulent mixing and cross shelf exchange, with wide ranging implications for transport, biological productivity and near-shore pollution. This study will explore how internal tides are transformed near the shelf break to propagate along the coast and how quickly they decay by radiating some of their energy offshore.In the deep ocean internal tides usually manifest as low vertical mode waves, however, close to the continental shelf break they may take the form of "leaky" (superinertial) baroclinic coastal trapped waves and edge waves. These modal structures are superinertial analogues to the well studied subinertial coastal trapped waves, having a component that radiates along the shelf break. However, they are distinguished from subinertial waves by exhibiting coincident radiation offshore (i.e. "leaking"). The goal of this study is to better understand the nature of internal tides close to the coastal margin, where the presence of leaky baroclinic trapped internal tides may contribute to the along shore variability and propagation of tidal energy. The study will consider the forcing of these waves by both the local astronomical tide, and by remotely incident deep ocean internal tides. The approach will include idealized, linear, two-dimensional (cross-shore) analyses; idealized, three-dimensional, nonlinear numerical simulations of the coastal response to local and remote forcing; and a suite of realistic numerical simulations to investigate leaky trapped internal tide energy along the U. S. West coast due to local and remote forcing.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
潮汐内波是由海面潮汐与地形相互作用而产生的,其产生、传播和消散是海洋中潮汐能的重要途径。内潮可构成大陆架的主要能源,在那里可导致孤立子生成、湍流混合和跨大陆架交换等过程,对运输、生物生产力和近岸污染产生广泛影响。本研究将探讨内潮如何在陆架坡折附近转变为沿着海岸传播,以及它们如何通过向近海辐射部分能量而迅速衰减。在深海内潮通常表现为低垂直模式波,然而,在靠近大陆架坡折处,它们可能表现为“泄漏”(超惯性)斜压海岸被困波和边缘波。这些模态结构是超惯性的类似物,充分研究了亚惯性沿海被困波,有一个组件,辐射沿着的货架休息。然而,它们与亚惯性波的区别在于表现出近海的重合辐射(即“泄漏”)。本研究的目的是为了更好地了解内潮汐的性质接近海岸边缘,在那里的泄漏斜压困内潮汐的存在可能有助于沿着海岸的变化和传播的潮汐能。这项研究将考虑当地天文潮汐和远程事件深海内潮对这些波的强迫。该方法将包括理想化,线性,二维(跨岸)分析;理想化,三维,非线性数值模拟的海岸响应本地和远程强迫;和一套现实的数值模拟调查泄漏困内潮汐能沿着美国。S.该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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James Lerczak其他文献

James Lerczak的其他文献

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{{ truncateString('James Lerczak', 18)}}的其他基金

Collaborative Research: Tidally rectified flows in multiple inlet/lagoon systems: Consequences for transport and residence times
合作研究:多个入口/泻湖系统中的潮汐整流流:对运输和停留时间的影响
  • 批准号:
    2219928
  • 财政年份:
    2022
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Standard Grant
West Coast Van Pool - 2018-2022 CY
西海岸厢型车池 - 2018-2022 CY
  • 批准号:
    1826858
  • 财政年份:
    2018
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Continuing Grant
Oregon State University/OCEANUS Ship Operations
俄勒冈州立大学/OCEANUS 船舶运营
  • 批准号:
    1823566
  • 财政年份:
    2018
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Cooperative Agreement
Flows Around Curves in Estuaries: Dynamics and Impacts
河口绕曲线流动:动力学和影响
  • 批准号:
    1829979
  • 财政年份:
    2018
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Standard Grant
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:
    1558972
  • 财政年份:
    2016
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Standard Grant
Dynamics of and Transport by Buoyant Coastal Ocean Currents Driven by Spatially Distributed and Highly-Time Dependent Coastal Mountain Rivers
空间分布和高度时间依赖性的沿海山区河流驱动的浮力沿海洋流的动力学和输送
  • 批准号:
    1260394
  • 财政年份:
    2013
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Standard Grant
Collaborative Research: Along-coast structure and propagation of internal tides
合作研究:沿海结构与内潮汐传播
  • 批准号:
    1155799
  • 财政年份:
    2012
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Standard Grant
Collaborative Research: The Dynamics of Shoaling and Breaking Nonlinear Internal Waves and their Transport, Dispersion and Buoyancy and Momentum Balances
合作研究:浅滩和破裂非线性内波动力学及其传输、色散以及浮力和动量平衡
  • 批准号:
    0732322
  • 财政年份:
    2007
  • 资助金额:
    $ 29.89万
  • 项目类别:
    Continuing Grant

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