Improved Delineation of Individual Outlet Glacier Drainage Basins From Tandem-X Elevations And Sentinel-1 Velocities

Individual drainage basins of ice sheets specify the glaciated area that is drained by a single outlet glacier. These catchments are needed to partition mass balance measurements to the single glacier level. Until now complete glacier inventories that contain annotated basin information are missing for the Earth's two ice sheets. Here we present delineations of all major outlet glacier catchments in Northeast Greenland that have been produced by a modified watershed algorithm using TanDEM-X elevations and Sentinel-1 velocity measurements. The approach shows the potential to generate a complete basin inventory for entire Greenland and Antarctica.