The School of Earth and Atmospheric Sciences Presents Susheel Adusumilli, Scripps Institution of Oceanography, University of California San Diego

Satellite Observations of Atmosphere-Ice-Ocean Interactions Around AntarcticaA recent study that will help drive the conclusions of the upcoming IPCC report uses multiple ice-sheet models to project that Antarctic ice loss will contribute -8 to 30 cm to global mean sea level rise by 2100 under the SSP5-8.5 scenario. The reason for the large uncertainty in these projections is the inability of models to adequately represent the processes that control atmosphere-ice-ocean interactions. In this talk, I will show how recent advances in satellite altimetry and photogrammetry can improve our understanding of several key processes such as ocean-driven ice melt and atmosphere-driven changes in snowfall. In the case of ocean-driven ice melt, I will demonstrate how these observations can be used to improve the representation of ice-ocean interactions in current models, focusing in particular on key regions such as grounding zones where the ice sheet transitions from being fully grounded to freely floating.