the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
The effect of landfast sea ice buttressing on ice dynamic speedup in the Larsen B embayment, Antarctica
Anna E. Hogg
Stephen L. Cornford
Benjamin J. Wallis
Benjamin J. Davison
Heather L. Selley
Ross A. W. Slater
Elise K. Lie
Livia Jakob
Andrew Ridout
Noel Gourmelen
Bryony I. D. Freer
Sally F. Wilson
Andrew Shepherd
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This study investigates the long- and short-term changes in the grounding line of the Amery Ice Shelf in East Antarctica, using satellite observations and a method called Differential Range Offset Tracking (DROT). Our findings show how the grounding line behaves in response to tides and other environmental factors, with implications for understanding ice shelf stability.
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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.