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27.06.2022: Ocean Circulation and Climate Dynamics Colloquium
Dr. Adele Morison, Australian National University: "Sensitivity of Antarctic shelf waters to wind and meltwater"
When? Monday, 27. June 2022 at 11 am
Where? ZOOM meeting room: https://geomar-de.zoom.us/j/81129629401?pwd=xA3GHm_f7d9JbLtD3qYAQbsN1zfdva.1
Meeting-ID: 811 2962 9401
Kenncode: 667761
The Antarctic ice sheet poses the largest potential mass contribution to global sea level rise, with an estimated 58 m of sea level equivalent. However, there remains huge uncertainty in projections of Antarctic ice loss over the coming centuries. In recent decades, Antarctic ice melt has been accelerating, driven by warmer ocean waters circulating on the continental shelf and underneath ice shelves. A key part of improving projections of ice loss is therefore to understand how ocean circulation and temperature around the Antarctic margins will change in the future. In this talk, I’ll present results from a series of wind forcing perturbation simulations using an eddy-rich global ocean-sea ice model. The simulations show a complex spatial pattern of positive and negative thermal feedbacks, which can be explained by the changing dynamics of processes such as localised dense water formation, northward sea ice export and along-shelf connectivity.
