39fd6746-3e32-437c-9b8f-097326d62cf6 Dataset German Aerospace Center (DLR) geoservice@dlr.de 2025-11-27T16:28:10 ISO 19115-1:2014/19139 EPSG:3031 Polar Monitor - Ice sheet drainage basins - Antarctica, 2010-2021 2025-07-10T00:00:00 https://geoservice.dlr.de/catalogue/srv/metadata/39fd6746-3e32-437c-9b8f-097326d62cf6 DOI: 10.15489/kel9qeeou202 The drainage divides of ice sheets separate the overall glaciated area into multiple sectors. These drainage basins are essential for partitioning mass changes of the ice sheet, as they specify the area over which basin specific measurements are integrated. In (Krieger et al., 2020) we developed a modified watershed algorithm for delineating individual glaciers and applied it to the Northeast Greenland sector. Here we extended the processing to the entire Antarctic Ice Sheet. Individual glacier catchments support a quantification of glacier changes for a specified region and are therefore an important tool in the field of glaciology and hydrology. The Antarctic drainage basins provide detailed information for partitioning mass changes of the ice sheet to the individual glacier or regional level. German Aerospace Center (DLR) Lukas.Krieger@dlr.de German Aerospace Center (DLR) geoservice@dlr.de https://geoservice.dlr.de/catalogue/srv/api/records/39fd6746-3e32-437c-9b8f-097326d62cf6/attachments/antarctic_basins_ql.jpg large_thumbnail https://geoservice.dlr.de/catalogue/srv/api/records/39fd6746-3e32-437c-9b8f-097326d62cf6/attachments/antarctic_basins_ql_s.jpg thumbnail Hydrography GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.local.theme.inspire-theme National Spatial scope 2024-05-23 geonetwork.thesaurus.external.place.SpatialScope.en DLR EOC Catchments Drainage basins Watershed Glacier Ice Sheet Antarctica opendata Nutzungseinschränkungen: Das DLR ist nicht haftbar für Schäden, die sich aus der Nutzung ergeben. / Use Limitations: DLR not liable for damage resulting from use. There are no limitations on public access to spatial data sets and services. Nutzungsbedingungen: Lizenz, https://creativecommons.org/licenses/by/4.0/ Terms of use: License, https://creativecommons.org/licenses/by/4.0/ {"id": "cc-by-4.0", "name": "Creative-Commons - Attribution 4.0 International (CC BY 4.0)", "url": "http://dcat-ap.de/def/licenses/cc-by/4.0", "quelle": "Copyright DLR (2025)"} 1000000 -180.00 180.00 -90.00 -64.00 2010-01-01T00:00:00 2021-12-31T23:59:59 geo+json geopackage+sqlite3 vnd.shp https://download.geoservice.dlr.de/POLAR_MONITOR/files/Antarctica/ WWW:LINK-1.0-http--link HTTP download Polar Monitor Antarctica https://doi.org/10.1016/j.rse.2019.111483 WWW:LINK-1.0-http--link Scientific Publication Scientific Publication https://geoservice.dlr.de/web/datasets/pm_ant WWW:LINK-1.0-http--link EOC Geoservice Dataset EOC Geoservice Dataset Conformity_001 INSPIRE Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 See the referenced specification. true Input data: In the modified watershed approach ice sheet wide velocity measurements by Sentinel-1 SAR (Nagler et al., 2015) and the 90 m TanDEM-X Polar DEM (Wessel et al., 2021) are combined to derive individual glacier drainage basins for the entire Antarctic Ice Sheet. The algorithm is seeded at the grounding line (Mouginot et al., 2017) Originating from selected seed points at the grounding line we produced discrete stream lines based on the methodology of (Cabral et al., 1993) for all areas exceeding a threshold of 50 m/yr and followed these upstream. For slower areas a classical flood-filling watershed algorithm is adopted (Beucher et al., 1992). A Monte Carlo simulation was performed, repeating the catchment delineation procedure 5000 times to account for uncertainties. The final catchment label was then determined by selecting the label that emerged as the majority outcome across all simulations. For processing details please consult (Krieger et al., 2020). The methodology has been validated in the Northeast Greenland sector by comparing the basin extent to existing delineations in the literature. Marginal discrepancies in catchment area arise for various reasons, including the choice of the DEM, the velocity dataset or the used methodology. As an independent, high accuracy data base for full validation of the results is lacking, quality assessment was supported by performing an intercomparsion with different input data combinations of DEMs and ice velocity products showing discrepancies of up to 16% in the extent of the catchment area. The quality of the presented results was further assessed by a probability measure from additional Monte-Carlo experiment.