This project is funded by the Deutsche Forschungsgemeinschaft (DFG) in the framework of the priority programme 1158 “Antarctic Research with comparative investigations in Arctic ice areas” with the project name “Quantifying millennial timescale grounding-line retreat in East Antarctica” and the grant number SCHA 2139/1-1. Furthermore, C. Schannwell was supported by the German Federal Ministry of Education and Research (BMBF) as a Research for Sustainability initiative (FONA) through the PalMod project under the grant number 01LP1915C. R. Drews and V. Višnjević were supported by an Emmy Noether Grant of the Deutsche Forschungsgemeinschaft (DR 822/3-1). We would also like to thank the Deutsches Klimarechenzentrum (DKRZ) for providing compute time.