Numerical Investigation of the Effect of Temporal Variability on Mixing and Entraiment in Marginal Sea Overflows

时间变化对边缘海溢流混合和卷吸影响的数值研究

• 批准号: 0326648
• 负责人: Tamay Ozgokmen
• 金额: $ 12.26万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0326648&HistoricalAwards=false
• 关键词: Numerical; Investigation; Effect; Temporal; Variability

Mixing and water mass modification in overflows play a strong role in the strength of the oceanic thermohaline circulation and hence they are potentially important in climate. However, these processes are sub-grid scale in most ocean circulation models and so must be parameterized. Most parameterization schemes are based on the dynamics of steady currents but oceanic plumes are in fact subject to forcing at a variety of scales from tidal to synoptic to seasonal. The goal of this project is to improve our understanding of the effects of time-dependent mixing in overflow plumes using data from three Red Sea cruises and by conducting process studies in idealistic and realistic 2D and 3D nonhydrostatic models. The results will improve parameterizations which are needed to represent overflows in models of the ocean general circulation and climate. This project will form the basis of the PhD thesis for a female student.

溢流中的混合和水团改变在海洋温盐环流的强度中发挥着重要作用，因此它们对气候具有潜在的重要作用。然而，在大多数海洋环流模型中，这些过程都是亚网格尺度的，因此必须参数化。大多数参数化方案都是基于稳定洋流的动力学，但海洋羽流实际上受到从潮汐到天气到季节性的各种尺度的强迫。该项目的目标是利用来自三个红海航行的数据，并通过在理想和现实的 2D 和 3D 非静水模型中进行过程研究，加深我们对溢出羽流中随时间变化的混合影响的理解。研究结果将改进在海洋环流和气候模型中表示溢流所需的参数化。该项目将构成女学生博士论文的基础。