A NEW BEDROCK AND SURFACE ELEVATION DATA SET FOR MODELLING THE
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 ne...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.627.1351 http://www.cpom.org/research/jlb-ag.pdf |
| Summary: | 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. |
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