Dynamics of a Buoyant Coastal Current Encountering Abrupt Changes in Coastline and Bathymetry

海岸线和水深突变时的浮力海岸流动力学

• 批准号: 0350891
• 负责人: Claudia Cenedese
• 金额: $ 49.1万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-02-15 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0350891&HistoricalAwards=false
• 关键词: Dynamics; Buoyant; Coastal; Current; Encountering

AbstractBuoyant coastal currents transport fresh water, heat, dissolved and particulate materials along many continental shelves and thereby impact coastal circulation and ecosystems. The dynamics by which they adjust to changes in topography and coastline are poorly understood. The PI's will use laboratory and numerical models to study a buoyant coastal current crossing a simple channel. Both surface-trapped currents, which do not feel the bottom, and slope-controlled currents which are steered by a sloping bottom will be considered. Buoyant fluxes into the channel and past the channel will be quantified among other variables. The synergy between laboratory and numerical models will be used to overcome the difficulties and uncertainties of each approach. Finally, the numerical model will be applied to several ocean locations with realistic coastlines and bathymetry and the results will be compared both to existing observations at these locations and to the results of idealized models.Broader Impacts: Better understanding of buoyant coastal currents as a result of this study will help other research efforts many of which are interdisciplinary. The results will become a part of a graduate course in coastal physical oceanography. The laboratory experiments will be displayed to school groups and will act as motivational and teaching tools.

摘要 沿海浮力流沿着许多大陆架输送淡水、热量、溶解物和颗粒物质，从而影响沿海环流和生态系统。人们对它们适应地形和海岸线变化的动态知之甚少。 PI 将使用实验室和数值模型来研究穿过简单海峡的沿海浮力流。将考虑感觉不到底部的表面捕获电流和由倾斜底部引导的坡度控制电流。进入通道和通过通道的浮力通量将与其他变量一起被量化。实验室和数值模型之间的协同作用将用于克服每种方法的困难和不确定性。最后，数值模型将应用于具有现实海岸线和水深测量的几个海洋位置，并将结果与​​这些位置的现有观测结果和理想化模型的结果进行比较。更广泛的影响：从而更好地理解浮力海岸流这项研究的成果将有助于其他研究工作，其中许多是跨学科的。研究结果将成为沿海物理海洋学研究生课程的一部分。实验室实验将向学校团体展示，并作为激励和教学工具。