Tuesday, November 5, 2024 - 4:00pm
Event Calendar Category
Other LIDS Events
Speaker Name
Shirui Peng
Affiliation
EAPS
Building and Room number
32-D650
Building and Room Number
LIDS Lounge
"Multiscale Interactions in the Oceanic Mixed Layer: Insights from Large-Eddy Simulations"
The oceanic mixed layer is characterized by multiscale interactions ranging from the kilometer-scale turbulence typical of geostrophic turbulence down to micro-scale turbulence generated by shear and convection. However, due to the large scale separation of these phenomena, understanding energy transfers among oceanic mesoscale processes down to microscopic turbulence remains a significant challenge. We present large-eddy simulations that resolve multiscale interactions within the oceanic mixed layer, encompassing boundary layer turbulence, submesoscale, and mesoscale processes. We compare hydrostatic and non-hydrostatic models featuring strong convergence zones, distinct warm and cold temperature fronts, and surface forcing. We analyze the spatial and spectral properties of temperature, velocity, and vorticity fields, and decompose these fields to investigate multiscale momentum and buoyancy fluxes. These insights aim to enhance parameterizations for multiscale dynamics in large-scale ocean models, contributing to more accurate predictions of ocean behavior and energy distribution under climate change.
Shirui Peng is a postdoc in Professor Abigail Bodner’s group at the MIT Department of Earth, Atmospheric and Planetary Sciences. Previously, he was a PhD student at Caltech, advised by Professor Jörn Callies. He is interested in climate and sustainability, inverse problem, and numerical modeling.
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