This presentation was given at the OCEAN:ICE Annual Meeting on October 25th, 2023 during the OCEAN:ICE Work Pacakges Progress, Results and Plans for the next 12 months session. Jan De Rydt (UNN) and Frank Payne (ULB) presented WP4 Quantification of Antarctic Ice Sheet 'deep uncertainty' and freshwater fluxes under climate forcing. The OCEAN:ICE Annual Meeting was part of a Joint Project meeting together with the EU Horizon 2020 project, SO-CHIC which took place at Sorbonne University in Paris from October 23rd to 26th, 2023. The Joint Project meeting included SO-CHIC's Annual Project Meeting, a Joint SO-CHIC and OCEAN:ICE Conference, and the OCEAN:ICE Annual Meeting.