报告人: Roy Barkan

Tel Aviv University/ UCLA

时  间：4月9日（周三）15:00-16:00

地  点：新奥工学大楼3F-3048 会议室

主持人：谢金翰 助理教授

内容简介：

    The ocean absorbs most of the heat and about a quarter of the carbon emissions caused by human activities. These anthropogenic perturbations significantly influence the ocean circulation, with direct and critical implications for the climate system. The ocean circulation is characterized by diverse turbulence regimes that span a vast range of spatial and temporal scales.   Understanding how these distinct turbulence regimes and their interactions lead to the observed spatiotemporal distributions of energy, heat, and tracers in the ocean is essential for predicting circulation adjustments and their effects on the climate system.

In this talk, I will discuss how the interplay between geostrophic turbulence, submesoscale turbulence, boundary layer turbulence, and weak-wave turbulence shapes the ocean circulation, with a particular focus on cross-scale energy transfer and dissipation patterns. I will also distinguish between the dominant processes occurring in the ocean’s mixed layer and in the deeper thermocline region. Finally, I will discuss how a comprehensive approach—combining analytical theory, circulation models of varying complexity, and carefully designed field experiments—can ultimately improve the representation of these turbulent processes in climate models.

报告人简介：

     Prof. Barkan has been a faculty member in the Faculty of Exact Sciences at Tel Aviv University and a researcher in the Department of Atmospheric and Oceanic Sciences at UCLA since 2018. His research focuses on geophysical and environmental fluid dynamics with an emphasis on understanding oceanic turbulence patterns and processes. In his research he combines analytical theories, high-resolution idealized and realistic numerical circulation models, and observational data analysis to investigate ocean heat, tracer, and energy transport across spatial and temporal scales, and from the ocean surface to the interior. Prof. Barkan holds a Ph.D in oceanography from the Scripps Institution of Oceanography at UCSD.

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