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Theresa Morrison (1), Julie McClean (1), Sarah Gille (1), Mathew Maltrud (2), Frank Bryan (3), Gustavo Marques (3), Detelina Ivanova (1); 1. Scripps Institution of Oceanography, 2. Los Alamos National Laboratory 3. National Center for Atmospheric Research
Abstract
Mass loss from the Greenland Ice Sheet has increased in recent decades adding a source of freshwater to the Subpolar North Atlantic. Freshwater perturbation experiments have shown that deepwater formation is sensitive to the magnitude and distribution of excess freshwater. However, these experiments have often not accounted for the vertical dilution of freshwater that occurs in narrow fjords along the ice sheet margin. The dilution and vertical structure of ice sheet melt water modify stratification and therefore are critical for understanding downstream impacts. Fully resolving the dynamics within glacial fjords is beyond the capabilities of high resolution Earth System Models and coupling between ice sheet and ocean models remains limited.
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