Internal Tides and Tidal Mixing in the Ross and Weddell Seas

罗斯海和威德尔海的内潮汐和潮汐混合

• 批准号: 0003425
• 负责人: Robin Robertson
• 金额: $ 22.14万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003425&HistoricalAwards=false
• 关键词: Internal; Tides; Tidal; Mixing; Ross

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.***

0003425Visbeck拟议的工作是尝试使用修改后的版本的普林斯顿海洋模式（广泛使用的海洋数值模式，由NOAA地球物理流体动力学实验室开发），以表征在罗斯海和威德尔海的潮汐垂直结构，并分离正压和斜压分量。 正压潮从洋面到洋底是均匀的，它影响水柱的混合、海底动量的耗散和海冰中铅的形成。 斜压潮随深度变化，并引入内波，底栖急流的形成，并能加强表面辐散。 目前对南极潮动力的垂直结构及其对大陆架和陆坡过程的影响知之甚少。 该项目的重点将是半日潮，预期结果是对内潮的产生区域、海底流速和切变增加的区域、表面发散和通过水柱的潮汐混合有新的认识。