the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Distribution and seasonal evolution of supraglacial lakes on Shackleton Ice Shelf, East Antarctica
Jennifer F. Arthur
Chris R. Stokes
Stewart S. R. Jamieson
J. Rachel Carr
Amber A. Leeson
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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.
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