Researchers at British Antarctic Survey (BAS), University of Bristol and University of California at Irvine (UCI), have produced a new map of what lies beneath the Greenland Ice Sheet. By providing scientists with the most comprehensive, high resolution and accurate picture of the bedrock and coastal seafloor, it reveals how the glaciers that drain from the Greenland Ice Sheet will contribute to future sea-level rise.
This double-sided geophysical and glaciological map shows the basal topography of Greenland and surrounding seabed. The topography of the subglacial landscape under the Greenland Ice Sheet was modelled using a mixture of radio echo-sounding and a glaciological model (BEDMACHINE 2) and is presented in a similar colour scheme to the Antarctic BEDMAP2.
The map is a result of a collaboration between BAS and Bristol University, based on recently released data from a joint project between Bristol University and the University of Irvine California.
Side 1 shows a detailed map, in plan view, and includes important names, coastline and the zero metre contour.
Side 2 presents a 3D view of the dataset, highlighting some of the important and interesting features and gives further details of how the surface was constructed.
Glaciologist Prof Jonathan Bamber at University of Bristol who had a NERC-funded project to develop the printed map and data set says:
“It reveals that many glaciers that drain the Greenland ice sheet are thicker than previously estimated – up to 100 metres in places – it also shows they have complex fjord geometries that will control how they react to changes from the effects of warmer ocean currents. This map will improve our understanding of the ice-ocean interactions and how the ice sheet will evolve in a changing climate.”