Internal Tides and Tidal Mixing in the Ross and Weddell Seas

所提出的工作是尝试使用普林斯顿海洋模型（由NOAA地球物理流体动力学实验室开发的一种广泛使用的海洋数值模型）的改进版本来表征罗斯海和威德尔海潮汐的垂直结构，并分离正压和斜压分量。正压潮从海面到海底是均匀的，它影响着水柱的混合、底栖动量的耗散和海冰中铅的形成。斜压潮随深度变化，引入内波，形成底栖射流，加剧地表辐散。目前对南极潮汐动力学的垂直结构及其对大陆架和斜坡过程的影响知之甚少。本项目的重点将放在半日潮上，预期结果将对内潮的产生区域、底栖生物速度和切变增加的区域、表面辐散和通过水柱的潮汐混合有新的认识

0003425VisbeckThe proposed work is an attempt to use a modified version of the Princeton Ocean Model (a widely-used numerical model of the ocean developed by the NOAA Geophysical Fluid Dynamics Laboratory) to characterize the vertical structure of tides in the Ross Sea and the Weddell Sea, and to separate the barotropic and baroclinic components. The barotropic tide is uniform from the ocean surface to the bottom, and influences mixing in the water column, benthic dissipation of momentum, and the formation of leads in sea ice. The baroclinic tide varies with depth, and introduces internal waves, benthic jet formation, and can intensify surface divergence. Currently little is known about the vertical structure of antarctic tidal dynamics and their influence continental shelf and slope processes. The focus of this project will be on the semi-diurnal tides, with the expected result a new understanding of generation regions for internal tides, regions of increased benthic velocities and shear, surface divergence, and tidal mixing through the water column.***