2026-06-27T14:08:08Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/RRRAG4.0012026-05-15T15:16:12Zcumulusretirednasa_nsidc_daac
RRRAG4.001Radiostratigraphy and Age Structure of the Greenland Ice SheetMacGregor, J. A., Fahnestock, M., Catania, G., Paden, J., Gogineni, P., Young, S. K., Rybarski, S. C., Mabrey, A. N., Wagman, B. M. & Morlighem, M.Radiostratigraphy and Age Structure of the Greenland Ice Sheet2015-08-11Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center1false10.5067/UGI2BGTC4QJAhttps://nsidc.org/sites/default/files/rrrag4-v001-userguide.pdfRRRAG4Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECRYOSPHEREGLACIERS/ICE SHEETSAGE AT ICE-THICKNESS-NORMALIZED DEPTHS EARTH SCIENCECRYOSPHEREGLACIERS/ICE SHEETSAGE OF INTERNAL REFLECTIONS EARTH SCIENCECRYOSPHEREGLACIERS/ICE SHEETSDEPTHS AT SPECIFIC AGES EARTH SCIENCECRYOSPHEREGLACIERS/ICE SHEETSGEOMETRY OF INTERNAL REFLECTIONS Geoscientific InformationDepthIB Related-projectIceBridgeIceBridge-related projectinternal layeringNASANSIDCNSIDC DAACACORDSAdvanced Coherent Radar Depth SounderICORDSImproved Coherent Radar Depth SounderMCRDSMulti-Channel Radar Depth SounderMCoRDSMultichannel Coherent Radar Depth SounderDC-8Douglas DC-8P-3BLockheed P-3B Orion1993-06-232013-04-26deprecated58.9181.51-88.336.62ContinentNorth AmericaGreenlandVariesVariesVariesData were quality controlled using multiple analysts, network graphs, and various other checks, especially to detect and resolve vertical overturning in the radar–inferred depth–age relationship.
The radiostratigraphy recorded within these radar data varies in quality depending on the system used and the area of the ice sheet surveyed. The overall quality of these radar data has improved over time as newer radar systems were developed and deployed. See MacGregor et al. Radiostratigraphy and Age Structure of the Greenland Ice Sheet, Journal of Geophysical Research Earth Surface, 120, doi:10.1002/2014JF003215 for additional details on quality control methods.These data have been retired and are no longer accessible, though a more recent version of these data may be available.These data have been retired and are no longer available for use, though a more recent version of these data may be available. Cite any prior or planned use of these data according to the recommended citation at https://nsidc.org/about/data-use-and-copyright.EnglishUTX-AUSTIN/IGNASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAHTTPS2.2 GBnetCDF-4HTTPS6 KBXMLHTTPS1.4 GBMATMacGregor, J. A., M. A. Fahnestock, G. A. Catania, J. D. Paden, S. P. Gogineni, S. K. Young, S. C. Rybarski, A. N. Mabrey, B. M. Wagman, and M. Morlighem. 2015. Radiostratigraphy and Age Structure of the Greenland Ice Sheet, Journal of Geophysical Research Earth Surface, 120, doi:10.1002/2014JF003215.
Gogineni, S., D. Tammana, D. Braaten, C. Leuschen, T. Akins, J. Legarsky, P. Kanagaratnam, J. Stiles, C. Allen, and K. Jezek. 1998. An improved coherent radar depth sounder, Journal of Glaciology, 44(148):659-669.This data set contains the traced deep radiostratigraphy of the Greenland Ice Sheet from airborne deep ice-penetrating radar data collected by The University of Kansas Improved Coherent Radar Depth Sounder (ICORDS), Advanced Coherent Radar Depth Sounder (ACORDS), Multi-Channel Radar Depth Sounder (MCRDS), and Multichannel Coherent Radar Depth Sounder (MCoRDS) instruments between 1993 and 2013. This is an IceBridge-related data set.VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/rrrag4-v001-userguide.pdfRadiostratigraphy and Age Structure of the Greenland Ice Sheet, Version 1 User GuideCEOS IDN DIFVERSION 9.92015-08-112026-05-15NSIDCVersion SummaryInitial releaseNSIDCMinor VersionNSIDCSpatial Reference SystemsEPSG:3413WGS 84 / NSIDC Sea Ice Polar Stereographic NorthNSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationMacGregor, J. A., Fahnestock, M., Catania, G., Paden, J., Gogineni, P., Young, S. K., Rybarski, S. C., Mabrey, A. N., Wagman, B. M. & Morlighem, M. (2015). <i>Radiostratigraphy and Age Structure of the Greenland Ice Sheet</i>. (RRRAG4, 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/UGI2BGTC4QJA">https://doi.org/10.5067/UGI2BGTC4QJA</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredtrue