Generation of Intense Meso-Scale Flows over the Shelf and Slope

在陆架和斜坡上产生强烈的中尺度流

• 批准号: 9415484
• 负责人: David Chapman
• 金额: $ 23万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9415484&HistoricalAwards=false
• 关键词: Generation; Intense; Meso; Scale; Flows

9415484 Chapman This study will extend ideas from previous investigations based on a linear unstratified model. The previous study revealed a new mechanism by which mesoscale features can be generated when the slope current is entirely stable. This new mechanism results from the scattering of coastally trapped waves (CTWs) by variations in the topography and coastline in the presence of a stable, narrow mean current over the continental slope. The extended work will be based on more realistic situations through the use of a primitive equation model. The main processes to be studied are: (1) adjustment of the slope current to the scattering topography; (2) interaction between changes in the current structure with the CTWs; and, (3) importance of instabilities in the mean current on the generation of mesoscale flow.

9415484查普曼本研究将基于线性非分层模型扩展以往研究的思路。以前的研究揭示了一种新的机制，即当斜率流完全稳定时，可以产生中尺度特征。这一新的机制是由于在大陆坡面上存在稳定的窄平均流的情况下，地形和海岸线的变化导致海岸捕获波(CTW)的散射。扩展的工作将基于更现实的情况，通过使用原始方程模型。研究的主要过程是：(1)斜率流对散射地形的调整；(2)流结构变化与CTW之间的相互作用；(3)平均流不稳定对中尺度流产生的重要性。