Collaborative Research: The Interaction of Estuarine Circulation and Wind-Driven Shelf Circulation

合作研究：河口环流与风驱动陆架环流的相互作用

• 批准号: 0453864
• 负责人: Jay Austin
• 金额: --
• 依托单位: Old Dominion University Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0453864&HistoricalAwards=false
• 关键词: Collaborative; Research; Interaction; Estuarine; Circulation

ABSTRACTOCE-0453864 / OCE-0453792While there is a large body of work investigating the influence of a static estuary on a wind-driven coastal ocean, and a similarly large body of work considering circulation inside an estuary coupled to a featureless ocean, very little work has been done looking at a more realistic coupling of an evolving coastal ocean to a large estuary. In this study, a numerical model will be used to explore the fundamental dynamics of the interaction between an idealized stratified, wind-driven coastal shelf and an idealized estuary. The two major questions addressed will be how wind-induced upwelling/downwelling on the shelf modifies the hydrographic structure of an adjacent estuary, and how the presence of the estuary affects upwelling/downwelling response to wind forcing on the shelf. In order to make the results readily applicable to a wide class of estuaries whose mouths are large compared to the internal radius of deformation in the coastal ocean, a process-oriented approach based on idealized scenarios will be used instead of more realistic models. The initial choice of parameters will be appropriate to the Chesapeake and Delaware estuaries, both because they are familiar and close to the investigators and because they are well studied. The findings are expected to elucidate the combinations of hydrographic, bathymetric and geometric parameters which govern the interaction between the estuaries and the coastal oceans. They may also help interpret results from a wide variety of more complex, realistic numerical models, as well as provide a new perspective for future observations and reanalysis of existing data. Broader Impacts: Because the exchange of water with the estuary and the upwelling/downwelling on the shelf are major influences on the biological and chemical structure of the coastal ocean, the study will improve ecological understanding of large estuaries and their adjacent shelves. It will also characterize how anthropogenic influences reach the coastal ocean. This work will support graduate and undergraduate students at both universities through their involvement in the research. This proposal will benefit students in ODU.s Minority Undergraduate Student Training program, and the results will be integrated into the educational component of ODU.s ongoing monitoring of hydrography at the mouth of the Chesapeake.

ABSTRACTOCE-0453864 / OCE-0453792虽然有大量工作研究静态河口对风驱动的沿海海洋的影响，并且有大量类似的工作考虑与无特征海洋耦合的河口内部的环流，但很少有工作已经完成了对不断变化的沿海海洋与大河口的更现实的耦合的研究。在本研究中，将使用数值模型来探索理想化的分层、风驱动的沿海陆架与理想化的河口之间相互作用的基本动力学。解决的两个主要问题是陆架上风引起的上升流/下降流如何改变邻近河口的水文结构，以及河口的存在如何影响陆架上的上升流/下降流对风力的响应。为了使结果易于适用于与沿海海洋变形内半径相比河口较大的各类河口，将使用基于理想化场景的面向过程的方法，而不是更现实的模型。 参数的初始选择将适合切萨皮克河口和特拉华河口，这既是因为它们对研究人员来说是熟悉且接近的，也因为它们得到了充分的研究。研究结果预计将阐明控制河口和沿海海洋之间相互作用的水文、测深和几何参数的组合。它们还可以帮助解释各种更复杂、更现实的数值模型的结果，并为未来的观察和现有数据的重新分析提供新的视角。更广泛的影响：由于与河口的水交换以及陆架上的上升/下降流对沿海海洋的生物和化学结构产生重大影响，因此该研究将提高对大型河口及其邻近陆架的生态认识。它还将描述人为影响如何影响沿海海洋。这项工作将通过参与研究来支持两所大学的研究生和本科生。该提案将使 ODU. 少数民族本科生培训计划的学生受益，其结果将被纳入 ODU. 切萨皮克河口持续水文学监测的教育部分。