A NEW BEDROCK AND SURFACE ELEVATION DATA SET FOR MODELLING THE

• Main Authors: Greenland Ice Sheet, J. L. Bamber, D. J. Baldwin, S. P. Gogineni
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Arctic Ocean; Greenland; East Greenland; Ice Sheet
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.627.1351; http://www.cpom.org/research/jlb-ag.pdf

A new digital elevation model of the surface of the Greenland ice sheet and surrounding rock outcrops has been produced from a comprehensive suite of satellite and airborne remote sensing and cartographic data sets. The surface model has been regridded to a resolution of 5 km, and combined with a new ice thickness grid derived from ice-penetrating radar data collected in the 1970s and 1990s. A further data set, the International Bathymetric Chart of the Arctic Ocean, was used to extend the bed elevations to include the continental shelf. The new bed topography was compared with a previous version used for ice sheet modelling. Near the margins of the ice sheet and, in particular, in the vicinity of small-scale features associated with outlet glaciers and rapid ice motion, significant differences were noted. This was highlighted by a detailed comparison of the bed topography around the North East Greenland Ice Stream. 1.