Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids, Version 1

A Digital Elevation Model (DEM), ice thickness grid, and bedrock elevation grid of Greenland, acquired as part of the PARCA program. DEM data are a combination of ERS-1 and Geosat satellite radar altimetry data, Airborne Topographic Mapper (ATM) data, and photogrammetric digital height data. Ice thickness data are based on approximately 700, 000 data points collected in the 1990s from a University of Kansas airborne Ice Penetrating Radar (IPR). Nearly 30, 000 data points were collected in the 1970s from a Technical University of Denmark (TUD) airborne echo sounder.The ice thickness grid was subtracted from the DEM to produce a grid of bedrock elevation values. Data set applications include studies of gravitational driving stress and ice volume (mass balance) of the Greenland Ice Sheet.

本数据集包含格陵兰岛的数字高程模型（Digital Elevation Model, DEM）、冰厚网格与基岩高程网格，数据源自PARCA计划。其中DEM数据整合了ERS-1与Geosat卫星雷达测高数据、机载地形测绘仪（Airborne Topographic Mapper, ATM）数据以及摄影测量数字高程数据。冰厚数据基于两类实测点集：1990年代由堪萨斯大学机载冰穿透雷达（Ice Penetrating Radar, IPR）采集的约70万个数据点，以及1970年代由丹麦技术大学（Technical University of Denmark, TUD）机载回声测深仪采集的近3万个数据点。研究人员通过将冰厚网格从DEM中减去，得到了基岩高程网格数据集。本数据集可用于格陵兰冰盖的重力驱动应力与冰体体积（物质平衡）相关研究。