Collaborative Research: Asymmetric Circulation in Wind-Driven Bays

合作研究：风驱动海湾的不对称环流

• 批准号: 0726697
• 负责人: Arnoldo Valle-Levinson
• 金额: $ 24万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-10-01 至 2009-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0726697&HistoricalAwards=false
• 关键词: Collaborative; Research; Asymmetric; Circulation; Wind

Intellectual MeritObservations of circulation and related physical variables have been collected in Bahia Concepcion, on the Gulf of California side of the Baja California peninsula in Mexico. The first goal of the original study was to describe through observations how rotation affects the wind-driven circulation in a relatively deep, well-mixed, semi-enclosed bay. We are in the process of submitting those results for publication. The period of observations, originally planned to last only through the well-mixed winter season, was extended to the entire year, including the highly stratified summer season. The extended data set gives us the opportunity to describe the physics of the bay when the water column is stratified. This study focuses on three separate time scales: the seasonal cycle associated with the onset and demise of stratification, the internal tides, and the barotropic and baroclinic seiches. The second goal of the original study was to develop an analytical model to represent the circulation driven by tides and the effects of friction and rotation on the estuarine flow. Those tasks are now complete. Motivated by the results of the winter observations we propose here to develop analytical models of three-dimensional time-dependent wind-driven flow, including the effect of advection, and to extend the tidal modeling effort to include stratified basins.Broader ImpactsThe ecological and societal importance of small coastal basins (bays, estuaries, lagoons) is outof proportion with their size. Among many other important ecological functions, lagoons and estuaries serve as way stations for migrating birds, as nurseries for an immense variety of fauna and flora and as mating and calving grounds for marine mammals such as the Pacific gray whale. At the same time these water bodies have been deeply impacted by anthropogenic activities. Many, if not all, are used as pathways through which sewage and contaminated waters are introduced into the ocean. In the past three years we have developed contacts with and given talks to engineering consultants and lay groups who are stewards of several lagoons in San Diego county. We plan to further develop these associations by providing free advice and consultation. By way of mitigation, The So. Cal. Edison company is undertaking an eighty million dollar restoration of San Dieguito Lagoon, north of San Diego. Here we propose to work with Coastal Environments, the consultancy charged with the scientific management of the project at the same time as we advise the San Dieguito Lagoon conservancy and other advocate groups. This project will allow us to participate in summer hands-on activities with high school students, and continue our outreach efforts with Florida elementary schools. In addition, this study represents a collaboration between scientists from the USA, including a minority representative, and Mexican scientists. The study will continue to enhance the participation of minority groups in science. It will train one graduate student and one Post-Doc and expose many others, including minority undergraduates, to state-of-the-art data collection, analysis and the application of numerical models. It will facilitate international cooperation and capacity building in Mexico and will also greatly enhance the courses taught by the PIs at graduate and undergraduate levels.

在墨西哥下加利福尼亚半岛的加州湾一侧的巴伊亚孔塞普西翁收集了环流和相关物理变量的观测资料。最初研究的第一个目标是通过观察来描述旋转如何影响相对较深，混合良好，半封闭的海湾中的风驱动环流。我们正在提交这些结果供出版。观测期原计划只持续到混合良好的冬季，后来延长到全年，包括高度分层的夏季。扩展的数据集使我们有机会描述海湾的物理时，水柱分层。本研究着重于三个独立的时间尺度：与层化的发生和消亡相关的季节循环，内潮，以及正压和斜压假潮。最初研究的第二个目标是开发一个分析模型，以代表潮汐驱动的环流以及摩擦和旋转对河口流的影响。这些任务现已完成。出于冬季观测的结果，我们建议在这里开发的三维随时间变化的风力驱动的流，包括平流的影响，并延长潮汐建模工作，包括分层basines.Broader ImpactsThe生态和社会的重要性，小沿海盆地（海湾，河口，泻湖）是不成比例的大小。在许多其他重要的生态功能中，泻湖和河口是候鸟的中途站，是各种动植物植物群的苗圃，也是太平洋灰鲸等海洋哺乳动物的交配和产犊地。与此同时，这些水体受到人类活动的深刻影响。许多（如果不是全部的话）被用作将污水和受污染的沃茨引入海洋的通道。在过去的三年里，我们已经建立了联系，并给予会谈的工程顾问和外行团体谁是在圣地亚哥县的几个泻湖管家。我们计划通过提供免费建议和咨询来进一步发展这些协会。为了减轻处罚，所以。加州爱迪生公司正在进行一项耗资8000万美元的圣地亚哥北部圣迭哥湖的修复工程。在这里，我们建议与海岸环境，负责该项目的科学管理，同时我们建议圣迭吉托泻湖保护和其他倡导团体的咨询工作。这个项目将使我们能够参加夏季动手活动与高中学生，并继续我们的推广工作与佛罗里达小学。此外，这项研究代表了美国科学家（包括少数民族代表）和墨西哥科学家之间的合作。这项研究将继续加强少数群体对科学的参与。它将培训一名研究生和一名博士后，并使包括少数民族大学生在内的许多其他人接触最先进的数据收集、分析和数字模型的应用。它将促进墨西哥的国际合作和能力建设，也将大大加强研究生和本科生水平的专业研究员教授的课程。