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Thursday, January 21 2021
11:00am - 12:00pm
Virtual seminar
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Peter Washam

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Satellite Observations of Atmosphere-Ice-Ocean Interactions Around Antarctica

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 Antarctica

A 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.

Click images in enlarge.