EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Coupled ice-ocean modelling of the Amundsen Sea glaciers

Jan De Rydt1 and Kaitlin Naughten2
Jan De Rydt and Kaitlin Naughten
  • 1Northumbria University, Geography and Environmental Sciences, Newcastle upon Tyne, UK
  • 2UKRI British Antarctic Survey, Cambridge, UK

Glaciers in the Pacific sector of West Antarctica are losing mass at an accelerating rate. Superimposed on this long-term trend are interannual variations in mass balance that result from a combination of internal ice dynamics and variability in ocean-induced ice shelf melt rates. We explore the relative importance of these internal and external drivers of change, using a newly developed coupling between the 3D ocean model MITgcm, and the SSA ice flow model Úa. For present-day ocean conditions, we simulate persistent retreat of the Pine Island, Thwaites, Smith and Kohler grounding lines between 2020 and 2150. We demonstrate complex changes in ice shelf melt rates caused by the evolving cavity geometries.

How to cite: De Rydt, J. and Naughten, K.: Coupled ice-ocean modelling of the Amundsen Sea glaciers, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-12248,, 2022.