Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session S15: Statistical and Nonlinear Physics of Earth and Its Climate
11:30 AM–2:30 PM,
Thursday, March 18, 2021
Sponsoring Units: GPC GSNP
Chair: Justin Burton, Emory University
Abstract: S15.00004 : Impacts of surface melt and hydrology on Antarctic ice-shelf dynamics and break-up*
12:30 PM–1:06 PM
Surface melting and ponding on the surfaces of Antarctic ice shelves is becoming increasingly widespread, and melt rates are predicted to increase significantly this century. Although the most up to date ice-sheet models do not account for the effects of meltwater ponding on ice-shelf stability explicitly, these models respond dramatically to increased ice-shelf melting, predicting up to 1 m of sea-level contribution from Antarctica this century.
By focusing on a variety of field, remotely-sensed and modeling based case studies drawn from my research, I will present recent progress and future research directions in the rapidly growing field of Antarctic ice-shelf surface hydrology and stability. Such case studies will include: i) the first field-based study of ice-shelf flexure in response to the filling and draining of surface lakes; ii) an optical and microwave satellite data based study showing 32-year record melt on the George VI Ice Shelf in the 2019/2020 austral summer; and iii) results from a new process-scale ice shelf model that simulates, for the first time, both ice flow and viscoelastic flexure in response to a variety of surface meltwater phenomena.
*NSF award #1841607 to the University of Colorado Boulder (PI Banwell).
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