the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Evaporative controls on Antarctic precipitation: an ECHAM6 model study using innovative water tracer diagnostics
Qinggang Gao
Louise C. Sime
Alison J. McLaren
Thomas J. Bracegirdle
Emilie Capron
Rachael H. Rhodes
Hans Christian Steen-Larsen
Xiaoxu Shi
Martin Werner
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In Antarctica, supraglacial lakes often form near grounding lines due to surface melting. We model viscoelastic tidal flexure in these regions to assess its contribution to lake drainage via hydrofracturing. Results show that tidal flexure and lake-water pressure jointly control drainage near unconfined grounding lines. Sensitivity analysis indicates the importance of the Maxwell time of ice in modulating the tidal response.
We investigated the influence of several regional climate models on the Antarctic Ice Sheet when applied as forcing for the Parallel Ice Sheet Model (PISM). Our study shows that the choice of regional climate model forcing results in uncertainties of around a tenth of those in future sea level rise projections and also affects the extent of grounding line retreat in West Antarctica.
calving laws), under the assumption that Antarctic ice shelf front positions should be in steady state under the current climate forcing. We quantify how well each of these calving laws replicates the observed front positions. Our results suggest that the eigencalving and von Mises laws are most suitable for Antarctic ice shelves.