Turbulent Regimes in Circumpolar Flow

这是一项实验室研究，目的是调查与地球海洋中观测到的纬向流有关的湍流地转流的状况。建立与实验室参数相适应的数值模拟模型。对海洋中的强迫、能量来源和环流的性质有了很多了解，这为评估实验室和数值结果提供了很好的信息背景。重点将放在南极洲周围南大洋的海洋环流上，那里似乎存在多股急流。将在实验室环境中研究地转湍流区域中的锋面形成和输送。FSU有一个独特的大型转台设备，可以追溯到早期的经典斜压波实验。这一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的数值模拟。数值模拟将有助于理解实验室中的地形贝塔比海洋中的行星贝塔的影响；它还将使更详细地研究风应力的影响。使用该模型，该团队将启动多喷流方案中质量和热量传输的参数化测试。广泛影响：拟议的研究涉及一名单独资助的本科生、一名研究助理和一名博士后职位。佛罗里达州立大学地球物理流体动力学研究所是一个多学科设施，将向广大社区提供使用实验设施的机会；这项提议有助于保持这一贡献。与Ruby Krishnamurti的密切合作将有助于将长期从事GFD实验的知识转移到研究所内，并保持这一能力。她将帮助为一名学生和博士后提供建议，这些学生和博士后将对拟议的项目进行实验和数据分析。

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.