Antarctic contribution to future sea-level rise with a three-dimensional ice-sheet model

Sea-level rise represents one of the biggest threats that humankind has to face in the
coming centuries. Antarctica hosts today's largest ice sheet on Earth, the Antarctic Ice Sheet
(AIS). In the mid-long term, the AIS could become the main contributor to sea-level rise,
especially as a result of the West Antarctic Ice Sheet (WAIS) being marine-based and
therefore strongly exposed to the ocean. Nonetheless, there is substantial uncertainty in the
future contribution of the AIS to sea-level rise, mainly as a result of poor understanding of
physical processes, such as ice-sheet dynamics or ice-ocean interactions. In order to
overcome the problem of different Antarctic sea-level projections with different experimental
setups, the Ice Sheet Model Intercomparison Project for CMIP6 was organized (ISMIP6).
The first results showed that at higher emission scenarios the AIS melts more. Nonetheless,
the WAIS response to this warming varies widely among the models. We herein investigate
the contribution of the higher-order ice-sheet model Yelmo. Results
with Yelmo show a strong sensitivity of the AIS contribution to sea-level rise to the calibration
of the basal-melting parametrization, particularly remarkable in the WAIS, but being in the
range of the results reached by other ice-sheets models in the context of the ISMIP6
intercomparison project.