the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
New gravity-derived bathymetry for the Thwaites, Crosson, and Dotson ice shelves revealing two ice shelf populations
David Porter
Kirsty Tinto
Romain Millan
Atsuhiro Muto
Kelly Hogan
Robert D. Larter
Alastair G. C. Graham
John D. Paden
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till extrusion, whereby deformable sediment is squeezed out from under the ice like toothpaste as it settles down at each low-tide position, as the most likely process.
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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.
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