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- OS23A-09: Increasing Antarctic meltwater hastens Southern Ocean change by decades in 21st-century projections
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Matthew Hoffman, Los Alamos National Laboratory (First Author, Presenting Author)
Irena Vankova, Los Alamos National Laboratory
Darin Comeau, Los Alamos National Laboratory
Stephen Price, Los Alamos National Laboratory
Xylar Asay-Davis, Los Alamos National Laboratory
Carolyn Begeman, University of California Santa Cruz
Jonathan Wolfe, Los Alamos National Laboratory
Ocean-driven melting from Antarctic floating ice modifies ocean temperatures and velocities, which in turn change the rate of melting. We study this feedback in a model that is able to evolve the rate of melting and the ocean state self-consistently, an improvement to previous studies using models with prescribed amount of meltwater that did not necessarily correspond to their ocean state. We find that the effect of meltwater addition is to accelerate oceanographic change around Antarctica, and whether the net feedback is positive or negative depends on the considered time period and climate scenario.
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