Turbulent Regimes in Circumpolar Flow

这是一项实验室研究，旨在研究湍流地转流的状态，这与在地球海洋中观察到的纬向流有关。将建立一个适合实验室参数的数值模拟。人们对海洋强迫、能量来源和环流的性质了解很多，这为评估实验室和数值结果提供了大量的背景信息。研究的重点将放在南极洲周围的南大洋的海洋环流上，那里似乎存在多股急流。地转乱流的锋面形成和输送将在实验室环境中进行研究。FSU有一个独特的大型旋转台设备，可以追溯到早期经典斜压波实验。此功能将用于实现适当的参数范围。还将对实验室实验进行互补的数值模拟。数值模拟将有助于了解与海洋中的行星β相比，实验室中的地形β的影响；它也将使更详细的研究风应力的影响。利用该模型，研究小组将开始对多喷流状态下的质量和热输运进行参数化测试。更广泛的影响：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。佛罗里达州立大学的地球物理流体动力学研究所是一个多学科的设施，将为广大社区提供使用实验设施的机会；这项建议有助于维持这一贡献。与Ruby Krishnamurti的密切合作将有助于转移长期从事GFD实验的知识，并在研究所内保持这种能力。她将帮助指导一名学生和博士后，他们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.