Turbulent Regimes in Circumpolar Flow

绕极流中的湍流状态

• 批准号: 0927583
• 负责人: Kevin Speer
• 金额: $ 34.69万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0927583&HistoricalAwards=false
• 关键词: Turbulent; Regimes; Circumpolar; Flow

This is a laboratory study to investigate the regime of turbulent geostrophic flow, which is relevant to the zonal flows being observed in Earth's oceans. A numerical simulation will be set up appropriate to the laboratory parameters. Much is known about the nature of the forcing, energy sources, and circulation in the ocean, providing a great background of information with which to assess laboratory and numerical results. The focus will be on the ocean circulation in the Southern Ocean around Antarctica where a multiple jet regime appears to exist. Frontal formation and transport in the geostrophic turbulence regime will be investigated in a laboratory setting. A unique, large rotating table facility exists at FSU dating from the early classic baroclinic wave experiments. This facility will be used to achieve the appropriate parameter ranges. Complementary numerical simulations of the laboratory experiment will also be carried out. The numerical simulation will help to understand the influence of topographic beta in the laboratory compared to the planetary beta in the ocean; it will also enable studies in more detail of the influence of the wind stress. Using the model the team will initiate tests of the parameterization of mass and heat transport in the multiple jet regime.Broader Impact:The proposed study involves one undergraduate student funded separately, a research associate and one postdoctoral position. The Geophysical Fluid Dynamics Institute at Florida State University is a multi-disciplinary facility that will provide access to experimental facilities to the broad community; this proposal helps to maintain this contribution. A close collaboration with Ruby Krishnamurti will help transfer knowledge from a long career in GFD experimentation and maintain this capability within the Institute. She will help advise a student and postdoc who will perform the experiments and data analysis on the proposed project.

这是一项实验室研究，目的是调查与地球海洋中观察到的纬向流有关的湍流地转流状况。将根据实验室参数设置数值模拟。关于海洋中的强迫、能量来源和环流的性质，我们已经知道了很多，这为评估实验室和数值结果提供了大量的背景信息。重点将放在南极洲周围南大洋的海洋环流上，那里似乎存在着多股急流。将在实验室环境中研究地转湍流区中锋面的形成和输送。一个独特的，大型旋转台设施存在于FSU约会从早期经典斜压波实验。该设施将用于实现适当的参数范围。还将对实验室实验进行补充数值模拟。与海洋中的行星β相比，数值模拟将有助于了解实验室中地形β的影响;它还将能够更详细地研究风应力的影响。使用该模型的团队将启动测试的参数化的质量和热量传输的多射流regime.Broader影响：拟议的研究涉及一名本科生单独资助，一名研究助理和一个博士后职位。佛罗里达州立大学的地球物理流体动力学研究所是一个多学科设施，将向广大社区提供实验设施;本提案有助于保持这一贡献。与Ruby Krishnamurti的密切合作将有助于从GFD实验的长期职业生涯中转移知识，并在研究所内保持这种能力。她将帮助建议学生和博士后谁将执行实验和数据分析的建议项目。