Symmetric Stability and Instability of Ocean Currents

洋流的对称稳定性和不稳定

• 批准号: 1032256
• 负责人: Rudolf Kloosterziel
• 金额: $ 27.39万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1032256&HistoricalAwards=false
• 关键词: Symmetric; Stability; Instability; Ocean; Currents

Intellectual Merit: The project uses the effective energy method to comprehensively study symmetric instability in vortices and parallel shear flows with and without vertical shear. The work follows on previous successes in developing the effective energy method and applying it to establishing stability criteria for barotropic and Couette flows. As with these previous results, the work promises to provide stability criteria for baroclinic flows that can be applied more generally than using traditional normal modes methods. The project will address the interactions between stability, instability, and dissipative mechanisms such as double diffusion. The work will provide a theoretical basis for understanding the stability mechanisms that govern a range of oceanic and atmospheric flows.Broader Impacts: The project addresses fundamental questions regarding the dynamics of geophysical flows, and is therefore relevant to understanding ocean currents and atmospheric winds. In particular, the work has potential broader impacts in advancing theoretical knowledge of shear flow and vortex stability in both the oceans and atmosphere. The work also has the potential to provide simple and unifying mathematical concepts to explain longstanding problems in geophysical fluid dynamics.

智能优点：该项目使用有效能量方法来综合研究有无垂直剪切的涡旋和平行剪切流中的对称不稳定性。这项工作是在发展有效能量法并将其应用于建立正压和Couette流的稳定性准则方面取得的成功的基础上进行的。与以前的结果一样，这项工作有望为斜压流提供比使用传统简正波方法更普遍适用的稳定性判据。该项目将解决稳定性、不稳定性和耗散机制(如双重扩散)之间的相互作用。这项工作将为理解支配一系列海洋和大气流动的稳定机制提供理论基础。广泛影响：该项目解决有关地球物理流动动力学的基本问题，因此与理解洋流和大气风有关。特别是，这项工作在促进海洋和大气中的切变流动和涡旋稳定性的理论知识方面具有潜在的更广泛的影响。这项工作还有可能提供简单和统一的数学概念来解释地球物理流体动力学中长期存在的问题。