2d0e4791-8e20-46a3-80e4-f5f6716025d2 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2022-02-28 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 BEDMAP3 - Ice thickness, bed and surface elevation for Antarctica - gridding products 2022-02-28 creation 2022-02-28 revision 2022-02-28 publication 2022-02-28 released 1.0 https://doi.org/10.5285/2d0e4791-8e20-46a3-80e4-f5f6716025d2 doi GB/NERC/BAS/PDC/01615 https://data.bas.ac.uk/ Please cite this item as: Pritchard, H., Fretwell, P., Fremand, A., Bodart, J., Kirkham, J., Aitken, A., Bamber, J., Bell, R., Bianchi, C., Bingham, R., Blankenship, D., Casassa, G., Catania, G., Christianson, K., Conway, H., Corr, H., Cui, X., Damaske, D., Damn, V., ... Zirizzotti, A. (2024). BEDMAP3 - Ice thickness, bed and surface elevation for Antarctica - gridding products (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/2d0e4791-8e20-46a3-80e4-f5f6716025d2 We present here Bedmap3, the latest suite of gridded products describing surface elevation, ice-thickness and the seafloor and subglacial bed elevation of Antarctica south of 60degS. Bedmap3 incorporates and adds to all post-1950s datasets previously used for Bedmap1 and Bedmap2, including 84 new aero-geophysical surveys by 15 data providers, an additional 52 million data points and 1.9 million line-kilometres of measurement. This has filled notable gaps in East Antarctica, including the South Pole and Pensacola basin, Dronning Maud Land, Recovery Glacier and Dome Fuji, Princess Elizabeth Land, plus the Antarctic Peninsula, West Antarctic coastlines, and the Transantarctic Mountains. Our new Bedmap3/RINGS grounding line similarly consolidates multiple recent mappings into a single, spatially coherent feature. Combined with updated maps of surface topography, ice shelf thickness, rock outcrops and bathymetry, Bedmap3 reveals in much greater detail the subglacial landscape and distribution of Antarctica's ice, providing new opportunities to interpret continental-scale landscape evolution and to model in detail the past and future evolution of the Antarctic ice sheets. Sponsored by the Scientific Committee on Antarctic Research (SCAR), the Bedmap3 Action group aims to produce a new map and datasets of Antarctic ice thickness and bed topography for the international scientific community. The associated Bedmap datasets are listed here: https://www.bas.ac.uk/project/bedmap/#data No credit. completed Pritchard, Hamish British Antarctic Survey Researcher author Fretwell, Peter British Antarctic Survey Researcher author Fremand, Alice British Antarctic Survey Researcher author Bodart, Julien Oeschger Centre for Climate Change Research, University of Bern Researcher author Kirkham, James British Antarctic Survey Researcher author Aitken, Alan Centre for Exploration Targeting, University of Western Australia, Perth Researcher author Bamber, Jonathan University of Bristol Researcher author Bell, Robin Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, USA Researcher author Bianchi, Cesidio Istituto Nazionale di Geofisica e Vulcanologia Researcher author Bingham, Robert University of Edinburgh Researcher author Blankenship, Donald Institute for Geophysics, Jackson School of Geosciences, University of Texas Researcher author Casassa, Gino University of Magallanes Researcher author Catania, Ginny University of Texas Researcher author Christianson, Knut Earth and Space Sciences, University of Washington Researcher author Conway, Howard Earth and Space Sciences, University of Washington Researcher author Corr, Hugh British Antarctic Survey Researcher author Cui, Xiangbin Polar Research Institute of China Researcher author Damaske, Detlef Federal Institute for Geosciences and Natural Resources Researcher author Damn, Volkmar Federal Institute for Geosciences and Natural Resources Researcher author Dorschel, Boris Alfred Wegener Institute Researcher author Drews, Reinhard Tubingen University, Department of Geosciences Researcher author Eagles, Graeme Alfred-Wegener-Institut Helmholtz-Zentrum fur Polar und Meeresforschung Researcher author Eisen, Olaf Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Researcher author Eisermann, Hannes Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Researcher author Ferraccioli, Fausto British Antarctic Survey Researcher author Field, Elena British Antarctic Survey Researcher author Forsberg, Rene DTU Space Researcher author Franke, Steven Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Researcher author Fujita, Shuji National Institute of Polar Research Researcher author Gim, Yonggyu Jet Propulsion Laboratory. California Institute of Technology Researcher author Goel, Vikram National Centre for Polar Ocean Research (NCPOR) Researcher author Gogineni, Siva Prasad University of Alabama Researcher author Greenbaum, Jamin Institute for Geophysics, Jackson School of Geosciences, University of Texas Researcher author Hills, Benjamin Department of Earth and Space Sciences, University of Washington Researcher author Hindmarsh, Richard British Antarctic Survey Researcher author Hoffman, Andrew Lamont-Doherty Earth Observatory of Columbia University Researcher author Holmlund, Per Stockholm University Researcher author Holschuh, Nicholas Amherst College Researcher author Holt, John University of Arizona Researcher author Horlings, Annika Earth and Space Sciences, University of Washington Researcher author Humbert, Angelika Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Researcher author Jacobel, Robert St. Olaf College Researcher author Jansen, Daniela Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Researcher author Jenkins, Adrian Northumbria University Researcher author Jokat, Wilfried Alfred Wegener Institute Helmholtz Center for Polar and Marine Research Researcher author Jordan, Tom British Antarctic Survey Researcher author King, Edward British Antarctic Survey Researcher author Kohler, Jack Norwegian Polar Institute Researcher author Krabill, William NASA Wallops Flight Facility Researcher author Langley, Kirsty Department of Geosciences, University of Oslo Researcher author Lee, Joohan Korean Polar Research Institute Researcher author Leitchenkov, German Institute for Geology and Mineral Resources of the World Ocean Researcher author Leuschen, Carlton Centre for Remote Sensing of Ice Sheets, University of Kansas Researcher author Luyendyk, Bruce Earth Research Institute, University of California Researcher author MacGregor, Joseph Cryospheric Sciences Lab, NASA Goddard Space Flight Center Researcher author MacKie, Emma Department of Geophysics, Stanford University Researcher author Matsuoka, Kenichi Norwegian Polar Institute Researcher author Moholdt, Geir Norwegian Polar Institute Researcher author Morlighem, Mathieu Department of Earth Sciences, Dartmouth College Researcher author Mouginot, Jeremie Univeristy of California Researcher author Nitsche, Frank Lamont-Doherty Earth Observatory, Columbia University Researcher author Nogi, Yoshifumi National Institute of Polar Research, Tokyo, Japan Researcher author Nost, Ole Norwegian Polar Institute Researcher author Paden, John Center for Remote Sensing of Ice Sheets (CReSIS), The University of Kansas Researcher author Pattyn, Frank Laboratoire de Glaciologie, Universite Libre de Bruxelles Researcher author Popov, Sergey Polar Marine Geosurvey Expedition Researcher author Kusk-Gillespie, Mette Western Norway University of Applied Sciences Researcher author Rignot, Eric University of California Researcher author Rippin, David University of York Researcher author Rivera, Andres Universidad de Chile Researcher author Roberts, Jason Department of the Environment, Australian Antarctic Division, Kingston, Tasmania Researcher author Ross, Neil Newcastle University Researcher author Ruppel, Antonia Federal Institute for Geosciences and Natural Resources Researcher author Schroeder, Dustin Stanford University Researcher author Siegert, Martin Imperial College London Researcher author Smith, Andrew British Antarctic Survey Researcher author Steinhage, Daniel Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Researcher author Studinger, Michael NASA Goddard Space Flight Center Researcher author Sun, Bo Polar Research Institute of China Researcher author Tabacco, Ignazio Istituto Nazionale di Geofisica e Vulcanologia Researcher author Tinto, Kirsty Lamont Doherty Earth Observatory Researcher author Urbini, Stefano Istituto Nazionale di Geofisica e Vulcanologia Researcher author Vaughan, David British Antarctic Survey Researcher author Welch, Brian St. Olaf College Researcher author Wilson, Douglas Marine Science Institute, University of California Researcher author Young, Duncan Institute for Geophysics, Jackson School of Geosciences, University of Texas Researcher author Zirizzotti, Achille Istituto Nazionale di Geofisica e Vulcanologia Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher BEDMAP Elevation Ice thickness theme Antarctica place Elevation theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Creative Commons Attribution 4.0 International otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions: 1. To cite the data and the Bedmap3 publication in any publication as follows: DATA: Pritchard, H., Fretwell, P., Fremand, A., Bodart, J., Kirkham, J., Aitken, A., Bamber, J., Bell, R., Bianchi, C., Bingham, R., Blankenship, D., Casassa, G., Catania, G., Christianson, K., Conway, H., Corr, H., Cui, X., Damaske, D., Damn, V., ... Zirizzotti, A. (2024). BEDMAP3 - Ice thickness, bed and surface elevation for Antarctica - gridding products (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/2d0e4791-8e20-46a3-80e4-f5f6716025d2 PAPER: Pritchard, H.D., Fretwell, P.T., Fremand, A.C. et al. Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica. Sci Data 12, 414 (2025). https://doi.org/10.1038/s41597-025-04672-y 2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data. otherRestrictions None doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference textTable eng utf8 elevation environment geoscientificInformation -180.0 180.0 -90.0 -60.0 1966-01-01 2024-11-01 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/plain image/tiff bytes 2222645576 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=2d0e4791-8e20-46a3-80e4-f5f6716025d2 WWW:LINK-1.0-http--link Get Data Download data download bytes 2222645576 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=2d0e4791-8e20-46a3-80e4-f5f6716025d2 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: We created the Bedmap3 classification mask and grids of surface elevation, ice thickness, bed topography and uncertainty from a combination of new and existing interpolations of discontinuous survey datasets (airborne ice thickness, ship-borne bathymetry), existing gridded datasets from satellite-based mapping of rock outcrops, surface topography and ice shelf thickness, and a compilation of grounding zone coastal features extracted from satellite analysis. These outputs were created in the ArcGIS Pro software package. Specific details are provided in the associated paper (Prichard et al.) Data quality: All the grids have a cell size of 500m in the WGS 1984 Antarctic Polar Stereographic projection (EPSG:3031). Some specific quality control checks and corrections (e.g. negative height relative to sea level for 'sea' cells while 'non-sea' cells have positive values) have been undertaken and are extensively described in the associated paper (Pritchard et al.). The uncertainty grids have been calculated through error budgets based upon a combination of published uncertainties and our own tests of accuracy and precision. The input datasets inherently have uncertainties with differing statistical distributions, and not all are well known. Furthermore, most Bedmap3 cells have values that are interpolated between sparse observations, and the uncertainties in this process are also difficult to quantify. Our uncertainties are therefore a best estimate based on the available evidence, given to approximately the 1-sigma level. asNeeded completed