A Numerical Study of Equatorial Waves and Wave-Induced Stirring in the Mid-Depth Atlantic Ocean

大西洋中深度赤道波和波激搅拌的数值研究

• 批准号: 9633332
• 负责人: Ping Chang
• 金额: $ 17.87万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633332&HistoricalAwards=false
• 关键词: Numerical; Study; Equatorial; Waves; Wave

OCE 96-33332 Chang The project will the hypothesis that mixing and Lagrangian transport due to equatorial trapped waves interacting with the western boundary may account for the equatorial chlorofluorocarbon (CFC) tongue which is observed to extend eastward at mid-depth in the Atlantic. The wave-induced mixing hypothesis will be extended in this work by emphasizing near-surface generation and vertical propagation of the Rossby and Yanai waves which are important to the mixing mechanism. A hierarchy of numerical experiments using several general circulation models will be conducted to investigate the contributions of wind forcing and shear instability to wave generation. Simulated particle trajectories will be used to investigate wave induced mixing and transport in the models, and the results will be compared to recent float tracks from the region. This work is expected to clarify the role of equatorial processes in the global thermohaline circulation.

OCE 96-33332 Chang项目将假设，由于赤道捕获波与西部边界相互作用而产生的混合和拉格朗日输送可能解释了在大西洋中部观察到的向东延伸的赤道氯氟化碳舌状物。通过强调Rossby波和Yanai波在混合机制中的近地表产生和垂直传播，本文将对波诱导混合假说进行扩展。我们将利用几个大气环流模式进行一系列数值试验，以研究风强迫和切变不稳定对波浪产生的贡献。模拟的粒子轨迹将被用来研究波浪在模型中的混合和传输，结果将与该地区最近的漂浮轨迹进行比较。这项工作预计将澄清赤道过程在全球温盐环流中的作用。