US-France Cooperative Research: Laboratory and Numerical Modeling of Topographic Effects on Oceanic Currents Along Sloping Surfaces

该奖项将支持唐纳德博士之间的合作研究。 亚利桑那州立大学的博耶和加布里埃尔·查伯特·德希雷斯博士， 法国格勒诺布尔机械研究所。 这项研究旨在 研究均质和两层流动的性质 旋转流沿着模型海岸线（或倾斜的地板， 深海），包括这种流动与 地形 该系统的建模参数包括 Rossby，Ekman和Burger数，沿着沿着 海岸线和表征地形的几何参数。 将主要考虑以下情况： 汉堡数量少，使分层的影响， 忽略 研究将包括实验室实验和 解析和数值准地转模式。 实验室 调查将在直径13米的 法国格勒诺布尔机械研究所的旋转拖曳罐。 这个设施允许实验与大陆架斜坡约 一个数量级比那些更传统的 转盘（即直径一到两米），因此允许一个 为了更精确地模拟可能的海洋 应用. 最初的实验室实验将集中在 关于沿岸背景流的认识 没有障碍物存在的水流， 海岸线要么在左边要么在右边 的相互作用 这些背景流与地形将被解决。 将特别注意下列情况： 阻塞、涡旋脱落和Rossby波等现象 发生. 这项研究的结果将有助于理解 地形对沿着洋流影响的基本特征 倾斜表面 格勒诺布尔的设施是独一无二的， 在这个项目中获得的经验将是宝贵的， 在美国开发类似的设施。

This award will support collaborative research between Dr. Donald Boyer, Arizona State University, and Dr. Gabriel Chabert d'Hieres, Institut de Mecanique de Grenoble, France. This research seeks to investigate the nature of the flow of homogeneous and two-layer rotating flows along model coastlines (or sloping floors in the deep ocean), including the interaction of such flows with topography. The modeling parameters for this system include the Rossby, Ekman and Burger numbers, the slope of the shelf along the coastline and geometric parameters characterizing the topography. Primary consideration will be given to such cases in which the Burger number is small, so that the effects of stratification can be neglected. The research will include laboratory experiments and analytical and numerical quasigeostrophic models. The laboratory investigations are to be conducted in the 13 meter diameter rotating tow tank of the Institut de Mecanique, Grenoble, France. This facility permits experiments with shelf slopes approximately one order of magnitude smaller than those on more conventional turntables (i.e. one to two meters in diameter) and thus allows one to more closely simulate this parameter for possible oceanic applications. The initial laboratory experiments will concentrate on understanding the background flow for the case of along-shore currents in which no obstacle is present and for which the shoreline is either on the left or on the right. The interaction of these background flows with topography will then be addressed. Particular attention will be focused on the conditions for which such phenomena as blocking, eddy shedding and trapped Rossby waves occur. The results of this research will contribute to the understanding of basic features of topographic effects on oceanic currents along sloping surfaces. The Grenoble facility is unique and the experience gained in this project will be valuable for the further development of a similiar facility in the U.S.