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Wednesday 06 April 2022, 15:00-16:00
Boundary layer turbulence below ice shelves in the shear-dominated regime
- đ¤ Speaker: Carolyn Begeman (Los Alamos National Laboratory)
- đ Date & Time: Wednesday 06 April 2022, 15:00 - 16:00
- đ Venue: https://ukri.zoom.us/j/99471476617;BAS seminar room 330b
Abstract
Large-eddy simulations have been a fruitful tool for studying ocean turbulence in the ice ocean boundary layer of sea ice and ice shelves. In this study, we used large-eddy simulations to examine the ice-shelf ocean boundary layer in a regime in which shear controls the rate of melting, modulated by stable stratification. Here, I focus on the turbulence characteristics, boundary layer structure, and melt rate as thermal driving and ice-shelf basal slope vary. I consider commonly-used parameterizations of ice-shelf melting and show that the melt rate scales approximately linearly with thermal driving, as parameterized, but mixing efficiency increases with basal slope, which is not parameterized. I close with some perspectives on using coarse-resolution models for ice-shelf melt projections.
Series This talk is part of the British Antarctic Survey - Polar Oceans seminar series series.
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