Ice thickness and ice-surface elevation in Greenland

Ice thickness data of Nioghalvfjerdsfjorden glacier, Northeast Greenland measured with the airborne EMI 60 MHz ice radar have been processed to produce preliminary ice-thicknesses along c. 3000 km flight-lines. A preliminary ice-thickness map of the c. 2000 km2 floating tongue and grounding zone of Nioghalvfjerdsfjorden glacier has been prepared. Laser-altimeter data for accurate surface profiling and differential GPS data for accurate positioning of the twin otter aircraft used for the radar measurements have been processed in collaboration with Kort og Matrikelstyrelsen (KMS).