Simulated ice-ocean-bedrock interactions in Antarctica until year 3000

The Antarctic Ice Sheet (AIS) is expected to be one of the dominant contributors to sea level rise in the near future. However, its future sea-level contribution is subject to substantial uncertainties related to modeling of physical processes. One key process is sub-shelf melting, which is particularly important in ice-shelf cavities, where warmer water intrusions could destabilize the corresponding ice shelves. This is of particular interest in the West Antarctic Ice Sheet, where many regions are marine based. Another fundamental process is Glacial Isostatic Adjustment, which is associated with the lithospheric rebound in response to changes in the ice load. Here, we use a 3D ice-sheet-shelf model coupled with a novel isostasy model to analyze the role of interactions between the ice, the ocean and the lithosphere in AIS projections during the next millennium. We combine experiments testing the sensitivity of several parameters concerning basal melting laws and different isostatic adjustment methods, under mean climatic conditions with high and low emissions scenarios.