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-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.在这项研究中，将使用数值模型来探索理想化的分层，风向沿海货架和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将是架子上的风引起的上升/下降时间如何修饰相邻河口的水文结构，以及河口的存在如何影响对架子上风力强迫的上升/下降响应。为了使结果容易地适用于与沿海海洋中内部变形相比，其嘴很大的广泛河口，将使用基于理想化场景的过程的方法而不是更现实的模型。 最初的参数选择将适合切萨皮克和特拉华州的河口，这都是因为它们熟悉并且与研究人员很近，并且研究了它们。这些发现有望阐明控制河口与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，并为未来的观察和重新分析现有数据提供了新的观点。更广泛的影响：由于水与河口的交换以及架子上的上升/下降流是对沿海海洋的生物学和化学结构的主要影响，因此该研究将提高对大河口及其相邻货架的生态理解。它还将表征人为影响如何到达沿海海洋。这项工作将通过参与研究来支持两所大学的毕业生和本科生。该建议将使ODU的学生受益于少数群体本科生培训计划，结果将纳入ODU.S持续监测水文的教育部分。