2026-06-26T07:58:33Zhttp://nsidc.org/api/dataset/metadata/oai

oai:nsidc.org/NSIDC-0092.0012026-03-03T21:04:24Zv0_daacv0_allnasa_nsidc_daac

NSIDC-0092.001Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation GridsBamber, J. L.Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids2001-01-01Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center1false10.5067/01A10Z9BM7KPhttps://nsidc.org/sites/default/files/nsidc-0092-v001-userguide.pdfNSIDC-0092Bamber, J. L., Layberry, R. L. & Gogenini, S. P.2001Journal of Geophysical Research106D2433,773-33,780<a href="https://doi.org/10.1029/2001JD900054">https://doi.org/10.1029/2001JD900054</a>Literature CitationLayberry, R. L. & Bamber, J. L.2001Journal of Geophysical Research106D2433,781 - 33,788<a href="https://doi.org/10.1029/2001JD900053">https://doi.org/10.1029/2001JD900053</a>Literature CitationInvestigatorJonathanLBamberj.l.bamber@bristol.ac.uk

Bristol Glaciology Centre

School of Geographical Sciences

University Road

Bristol, BS8 1SS

UNITED KINGDOM

Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468

CIRES, 449 UCB

University of Colorado

BoulderCO80309-0449USAEARTH SCIENCELAND SURFACETOPOGRAPHYTERRAIN ELEVATIONBED ELEVATION EARTH SCIENCELAND SURFACETOPOGRAPHYTERRAIN ELEVATIONDIGITAL ELEVATION/TERRAIN MODEL (DEM) EARTH SCIENCECRYOSPHERESNOW/ICEICE DEPTH/THICKNESS AltimetryBedrock ElevationDAACDemDEMs Greenland-projectDEMs-projectDigital Elevation ModelEcho SounderEOSDISGreenlandIce Penetrating RadarIce SheetIce Sheet ElevationIce ThicknessIPRNASAPARCAPARCA-projectRadarSurface ElevationTopographyALTIMETERSATMAirborne Topographic MapperRAERS Radar AltimeterRADAR ALTIMETERSRADAR ECHO SOUNDERSAIRCRAFTGEOSATGeodetic Satellite1970-01-011970-12-011993-01-011999-12-31complete6084-72-15CONTINENTNORTH AMERICAGREENLAND5 km5 kmNot applicableVarious methods were applied to improve the accuracy of elevation estimates over the Greenland ice sheet, including waveform tracking, slope correction, data filtering (tests for return-echo waveform shape, backscatter coefficient, and retracking correction values for each altimeter height estimate), and removal of anomalous orbits. Errors in the estimate of derived ice thickness measurements were determined by comparing the radar-based measurements with those from the Greenland Ice Sheet Project (GISP) and Greenland Ice Core Project (GRIP) ice cores. Results showed that radar-based measurements were within 10 m of ice core measurements. No corrections were made for firn effect. Since elevation and ice thickness data from the 1970s were much less accurate than the 1990s data, errors in the merged grid were most significant where 1970s and 1990s tracks were in close proximity. Errors in the 1970s data did not cause anomalously high ice thickness gradients at a distance of three grid points (15 km) away from the 1990s data, so gridded data points closer than three grid cells to the 1990s data were removed (Bamber, Layberry, and Gogenini 2000). See guide document for a more complete description.These data are freely, openly, and fully accessible, provided that you are logged into your NASA Earthdata profile (https://urs.earthdata.nasa.gov/).These data are freely, openly, and fully available to use without restrictions, provided that you cite the data according to the recommended citation at https://nsidc.org/about/use_copyright.html. For more information on the NASA EOSDIS Data Use Policy, see https://earthdata.nasa.gov/earth-observation-data/data-use-policy.EnglishNASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

BoulderCO80309-0449USAHTTPSTIFFHTTPSIMGHTTPSBinaryFTP4.5 MBASCIIBamber, J.L., S. Ekholm, W.B. Krabill. 2000. A new, high-resolution digital elevation model of Greenland fully validated with airborne laser altimeter data. Journal of Geophysical Research. In press. Bamber, J.L., R.L. Layberry, S.P. Gogenini. 2000. A new ice thickness and bedrock dataset for the Greenland ice sheet: part I. Journal of Geophysical Research. In press. Bamber, J.L., Ekholm, S., and Krabill, W. B. 1998. The accuracy of satellite radar altimeter data over the Greenland ice sheet determined from airborne laser data, Geophysical Research Letters. 25(16): 3177-3180. Bamber, J.L. and R.A. Bindschadler. 1997. An improved elevation dataset for climate and ice-sheet modelling: validation with satellite imagery. Annals of Glaciology 25:438-444. Bamber, J.L. and P. Huybrechts. 1996. Geometric boundary conditions for modelling the velocity field of the Antarctic ice sheet. Annals of Glaciology 23:364-373. Bamber, J. and C. Bentley. 1994. A comparison of satellite-altimetry and ice thickness measurements of the Ross Ice Shelf, Antarctica. Annals of Glaciology 20:357-364. Bamber, J. 1994. A digital elevation model of the Antarctic ice sheet derived from ERS-1 altimeter data and comparison with terrestrial measurements. Annals of Glaciology 20:48-54. Bamber, J. 1994. Ice sheet altimeter processing scheme. International Journal of Remote Sensing 15:925-938. Bogorodskiy, V.V., C.R. Bentley, P.E. Gudmandsen. 1985. Radioglaciology. Dordrecht: D. Reidel Publishing Company. Brenner, A.C., R.A. Bindschadler, R.H. Thomas, H.J. Zwally. 1983. Slope-induced errors in radar altimetry over continental ice sheets. Journal of Geophysical Research 88:1617-1623. Davis C.H., H.J. Zwally. 1993. Geographic and seasonal variations in the surface properties of the ice sheets by satellite radar altimetry. Journal of Glaciology 39:687-697. Gogineni, S., D. Tammana, D. Braaten, C. Leuschen, T. Atkins, J. Legarsky, P. Kanagaratnam, J. Stiles, C. Allen, and K. Jezek. 2000. Coherent radar ice thickness measurements over the Greenland Ice Sheet. Journal of Geophysical Research. In press. Hodge, S.M., D.L. Wright, J.A. Bradley, R. W. Jacobel, N. Skou, and B. Vaughn. 1990. Determination of the surface and bed topography in central Greenland. Journal of Glaciology 36(122):17-30. Weng, W.L. 1995. Untitled. Arctic 48(2):206. Zwally, H.J., R.A. Bindschadler, A.C. Brenner, T.V. Martin, R.H. Thomas. 1983. Surface elevation contours of Greenland and Antarctic ice sheets. Journal of Geophysical Research 88(C3):1589-1596.

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.

VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/nsidc-0092-v001-userguide.pdfGreenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids, Version 1 User GuideGET DATAhttps://daacdata.apps.nsidc.org/pub/DATASETS/BAMBER_THICKNESS/HTTPSVIEW RELATED INFORMATIONhttp://nsidc.org/data/dems/index.htmlPolar Ice Sheet DEMs and Topographic Data at NSIDCVIEW RELATED INFORMATIONhttp://nsidc.org/data/dems/index.htmlPolar Ice Sheet DEMs and Elevation DataVIEW RELATED INFORMATIONhttp://nsidc.org/data/gis/index.htmlGIS Data and Resources at NSIDCVIEW RELATED INFORMATIONhttp://nsidc.org/data/atlas/Atlas of the CryosphereUSA/NASACEOS IDN DIFVERSION 9.92001-01-012026-03-03NSIDCVersion Summaryinitial releaseNSIDCMinor VersionNSIDCUpdate Frequencyupdated 2021NSIDCCurrent Version1NSIDCLevel of ServiceStandardNSIDCFull Dataset CitationBamber, J. L. (2001). <i>Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids</i>. (NSIDC-0092, Version 1). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/01A10Z9BM7KP">https://doi.org/10.5067/01A10Z9BM7KP</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredfalseNSIDCRelated Servicesapplication/vnd.nasa.cmr.umm+jsonfalseamyygillilandmmt_service_12717S1977897447-NSIDCV0NSIDCV06service2025-04-01T22:12:52.112Zhttps://daacdata.apps.nsidc.org/NSIDCV0_DAAC_Data_HTTPS_File_SystemNOT PROVIDED1HTTPS File SystemQuickly download a few files using a web browser, or access the data through a command-line utility such as WGET.https://nsidc.org/data/user-resources/help-center/programmatic-access-guide-data-daacdataappsVIEW RELATED INFORMATIONProgrammatic Data Access GuidePublicationURLUSER SERVICESNSIDC DAAC User ServicesEmailnsidc@nsidc.orgDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESThis is the most current release of this service.DEVELOPERORIGINATORPUBLISHERSERVICE PROVIDERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA NSIDC DAACNASA Distributed Active Archive Center (DAAC) at NSIDChttps://nsidc.org/daacNSIDC DAAC Home Pagehttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://daacdata.apps.nsidc.org/pub/DATASETS/BAMBER_THICKNESS/