the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Mid-Holocene thinning of David Glacier, Antarctica: chronology and controls
Andrew Mackintosh
Kevin Norton
Ross Whitmore
Carlo Baroni
Stewart S. R. Jamieson
Richard S. Jones
Greg Balco
Maria Cristina Salvatore
Stefano Casale
Jae Il Lee
Yeong Bae Seong
Robert McKay
Lauren J. Vargo
Daniel Lowry
Perry Spector
Marcus Christl
Susan Ivy Ochs
Luigia Di Nicola
Maria Iarossi
Finlay Stuart
Tom Woodruff
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Masiere di Vedanais a rock avalanche deposit (9 km2, 170 Mm3) in NE Italy. We dated it back to late Roman to early Middle Ages. Identified drivers are the overall structural setting, exceptional rainfall events and seismic shakings. No exceptional event is required as a trigger. When dealing with heavily deformed bedrocks, especially in inhabited areas, the occurrence of a huge event like this must be considered.
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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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