The Antarctic Ice Sheet is a critical component of the global climate system, and its margins are particularly vulnerable to atmospheric and oceanic forcing. The retreat and dynamic instability of these margins pose one of the largest uncertainties in future sea-level rise projections. Understanding the past and future evolution of the Antarctic Ice Sheet requires an approach that brings together direct observations, paleo-environmental reconstructions, and numerical modeling.

This session invites contributions focusing on understanding the dynamics of Antarctic ice sheet margins through data and models across various timescales, from paleo and Holocene retreat to near- and long-term future projections. To bridge the gaps between empirical data and physical models, we strongly encourage (1) field studies incorporating different empirical datasets that help constrain numerical models, (2) modeling-based studies that help interpret observations and paleo reconstructions, and (3) combined studies involving data-model comparisons over different timescales.

Topics of interest include processes driving grounding line migration across timescales; reconstructions of past ice margin retreat/advance from marine and terrestrial geological archives; observations or reconstructions of ice dynamics and mass balance changes; the identification of tipping points and conditions, and projections of future ice-sheet contributions to global sea-level rise. By bringing together observation and modeling, this session aims to foster cross-disciplinary discussions and improve our predictive capability regarding the fate of the Antarctic Ice Sheet.