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: 0551923
• 负责人: Arnoldo Valle-Levinson
• 金额: $ 14.13万
• 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: 2005
• 资助国家: 美国
• 起止时间: 2005-08-07 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0551923&HistoricalAwards=false
• 关键词: Collaborative; Research; Asymmetric; Circulation; Wind

ABSTRACTOCE-0425147 Asymmetric circulation in wind-driven baysIntellectual MeritA recent analytical model predicts that the wind-driven circulation in small coastal basins is fundamentally influenced by the Earth's rotation when the basin depth is greater than the Ekman depth. Rotation affects the character and complexity of fluid parcel trajectories, with important consequences for mixing and residence times. A combination of observations and analytical and numerical simulations will be conducted to verify and extend this model. Field observations will be done during the winter season 2004-2005 in Bahia Concepcion, on the Gulf of California side of the Baja California peninsula in Mexico. The bay is subject to strong wind forcing throughout the winter, when it is vertically well mixed. The observations will include moored instrumentation, shipboard surveys and drifter deployments and the scientific objectives are:(a) to describe through observations how rotation affects the wind-driven circulation and the exchange with the ocean in a relatively deep, well-mixed, semi-enclosed bay that is exposed to strong winds, and(b) to extend the analytical model to represent the circulation driven by tides and by lateral density gradients, and to describe with numerical models how advection and vertical stratification modify this circulation.Broader ImpactsThe ecological and societal importance of small coastal basins (bays, estuaries, lagoons) is out of proportion with their size. Among other ecological functions, lagoons and estuaries serve as way stations for bird migration, as nurseries for fauna and flora and as mating and calving grounds for certain marine mammals. At the same time these water bodies have been deeply impacted by anthropogenic activities. By developing a dynamical description of the processes that control circulation in these basins and exchange with the ocean, this study will help minimize human impacts such as sewage discharge through science-based management and engineering practices. In addition, this project represents international collaboration with Mexican scientists, supports two graduate students. One of the PIs is a member of an underrepresented group. The study will also expose undergraduates, including minority groups, to research.

Abstractoce-0425147风向的Baysintlectual Merita中的不对称循环最近预测，当盆地深度大于Ekman深度时，小沿海盆地中的风驱动循环从根本上受到地球旋转的影响。旋转会影响流体包裹轨迹的特征和复杂性，对混合和停留时间产生了重要的后果。将进行观察以及分析和数值模拟的组合，以验证和扩展此模型。现场观察将在2004 - 2005年冬季在墨西哥巴哈加州加利福尼亚半岛加利福尼亚海湾的巴伊亚康塞普西翁进行。在整个冬季，垂直混合时，海湾会在整个冬季强烈强迫。 The observations will include moored instrumentation, shipboard surveys and drifter deployments and the scientific objectives are:(a) to describe through observations how rotation affects the wind-driven circulation and the exchange with the ocean in a relatively deep, well-mixed, semi-enclosed bay that is exposed to strong winds, and(b) to extend the analytical model to represent the circulation driven by tides and by lateral density gradients, and to describe with数值模型对流和垂直分层如何修改此循环。BOADER会影响小沿海盆地（海湾，河口，泻湖）的生态和社会重要性与其大小不成比例。除其他生态功能外，泻湖和河口是鸟类迁移的路线，作为动物群和动植物的苗圃，以及某些海洋哺乳动物的交配和产犊场。同时，这些水体受到人为活动的深远影响。通过对控制这些盆地中循环的过程进行动态描述并与海洋交流，这项研究将有助于最大程度地减少人类的影响，例如通过基于科学的管理和工程实践，例如污水排放。此外，该项目代表了与墨西哥科学家的国际合作，支持两名研究生。其中一个PI是代表性不足的群体的成员。这项研究还将使包括少数群体在内的本科生进行研究。