Changing basal conditions during the speed-up of Jakobshavn Isbræ, Greenland

Published: Jun 1, 2013 by The PISM Authors


Title	Changing basal conditions during the speed-up of Jakobshavn Isbræ, Greenland
Authors	Marijke Habermann, Martin Truffer, and David Maxwell, University of Alaska Fairbanks
Venue	EGU 2013

Here, basal conditions for different years before and after the break-up of the tongue are inferred from surface velocity measurements to investigate the changes and to compare them with parameterizations of basal conditions commonly used in ice-sheet models. All inversions reproduce the overall pattern of observed surface velocities, which shows that, in general, our data and model choices are capable of reproducing the observations by only adjusting basal yield stress. In the lower 5 km of the glacier a clear trend from higher to lower basal yield stress values is visible.

In the department of Integrative Earth system science at the newly founded Max Planck Institute of Geoanthropology (MPI-GEA) in Jena, Germany, we are providing a three-year PhD position as part of the DFG priority program “Antarctic Research with Comparative Investigations in Arctic Ice Areas”.

A two-year PostDoc positions in ice sheet and Earth system modelling is available in the Ice Dynamics group, as part of the new Earth Resilience Science Unit (ERSU), at the Potsdam Institute for Climate Impact Research (PIK).

Two PhD fellowship positions in ice sheet modelling are advertised at the Niels Bohr Institute, University of Copenhagen.