2026-06-14T01:32:37Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/NSIDC-0668.0022025-12-22T21:19:06Zv0_daacv0_allnasa_nsidc_daac
NSIDC-0668.002CanSISE Observation-Based Ensemble of Northern Hemisphere Terrestrial Snow Water EquivalentMudryk, L. R. & Derksen, C.CanSISE Observation-Based Ensemble of Northern Hemisphere Terrestrial Snow Water Equivalent2017-01-23Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center2false10.5067/96ltniikJ7vdhttps://nsidc.org/sites/default/files/nsidc-0668-v002-userguide_1.pdfNSIDC-0668Mudryk, L. R. et al2015Characterization of Northern Hemisphere Snow Water Equivalent Datasets, 1981–2010Journal of Climate28208037-8051<a href="https://doi.org/10.1175/JCLI-D-15-0229.1">https://doi.org/10.1175/JCLI-D-15-0229.1</a>Literature CitationInvestigatorLawrenceRMudrykLawrence.mudryk@canada.ca1-416-739-4360InvestigatorChrisDerksenchris.derksen@canada.caTechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCETERRESTRIAL HYDROSPHERESNOW/ICESNOW WATER EQUIVALENT Climatology/Meteorology/AtmosphereAMSR-EMODISSMMRSSM/IAMSR-EAdvanced Microwave Scanning Radiometer-EOSMODISModerate-Resolution Imaging SpectroradiometerSMMRScanning Multichannel Microwave RadiometerSSM/ISpecial Sensor Microwave/ImagerTOVSTIROS Operational Vertical SounderAQUAEarth Observing System, AQUADMSPDefense Meteorological Satellite ProgramNimbus-7Nimbus-7TERRAEarth Observing System, TERRA (AM-1)TIROSTelevision Infrared Observation Satellite1981-01-012010-12-31complete090-180180Geographic RegionNorthern Hemisphere1 degree1 degree1 dayThese 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 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 ColoradoBoulderCO80309-0449USAHTTPS2.73 GBNetCDFFTP2.73 GBNetCDFBalsamo, G., et al. 2015. ERA-Interim/Land: A global land surfaces reanalysis data set. Hydrology and Earth System Sciences 19(1): 389–407. doi: 10.5194/hess-19-389-2015.
Brun, E., et al. 2013. Simulation of northern Eurasian local snow depth, mass, and density using a detailed snowpack model and meteorological reanalyses. Journal of Hydrometeorology 14(1): 203–219. doi: 10.1175/JHM-D-12-012.1.
Rienecker, M. M., et al. 2011. MERRA: NASA’s Modern-Era Retrospective Analysis for Research and
Applications. Journal of Climate 24: 3624–3648. doi: 10.1175/JCLI-D-11-00015.1.
Rodell, M., et al. 2004. The Global Land Data Assimilation System. Bulletin of the American Meteorological Society 85(3): 381–394. doi: 10.1175/BAMS-85-3-381.
Rodell, M., and H. K. Beaudoing. 2013. GLDAS CLM Land Surface Model L4 3 Hourly 1.0 x 1.0 degree subsetted, version 001. Goddard Earth Sciences Data and Information Services Center (GES DISC), NASA/GSFC/HSL, doi:10.5067/0JNJQ8ZDZRBA.
Takala, M., K. Luojus, J. Pulliainen, C. Derksen, L. Lemmetyinen, J.-P. Kärnä, and J. Koskinen. 2011. Estimating Northern Hemisphere snow water equivalent for climate research through assimilation of space-borne radiometer data and ground-based measurements. Remote Sensing of Environment 115(12): 3517–3529. doi: 10.1016/j.rse.2011.08.014.This data set is a daily gridded terrestrial snow water equivalent (SWE) dataset based on five component SWE products:
<ul>
<li><a href="http://www.globsnow.info">GlobSnow combined SWE product (passive microwave/ground-based weather station, version 2)</a></li>
<li><a href="http://apps.ecmwf.int/datasets/.">ERA-Interim/Land reanalysis SWE product</a></li>
<li><a href="http://gmao.gsfc.nasa.gov/pubs/docs/Reichle541.pdf">MERRA reanalysis SWE product </a></li>
<li>Crocus SWE data set: output from the Crocus snowpack model, driven by ERA-Interim meteorology (<a href="http://dx.doi.org/10.1175/JHM-D-12-012.1">Brun et al. 2013</a>)</li>
<li>GLDAS SWE product (version 2) (<a href="http://dx.doi.org/10.1175/BAMS-85-3-381">Rodell et al. 2004</a>; <a href="http://dx.doi.org/10.5067/0JNJQ8ZDZRBA">Rodell and Beaudoing 2013</a>)</li>
</ul>VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/nsidc-0668-v002-userguide_1.pdfCanSISE Observation-Based Ensemble of Northern Hemisphere Terrestrial Snow Water Equivalent, Version 2 User GuideGET DATAhttps://daacdata.apps.nsidc.org/pub/DATASETS/nsidc0668_swe_ensemble_v2HTTPSVIEW RELATED INFORMATIONhttp://www.globsnow.infoGlobSnowVIEW RELATED INFORMATIONhttp://www.ecmwf.int/en/research/climate-reanalysis/era-interim/landERA-Interim/LandVIEW RELATED INFORMATIONhttp://gmao.gsfc.nasa.gov/research/merra/MERRA: Modern-era Retrospective Analysis for Research and ApplicationsVIEW RELATED INFORMATIONhttp://gdata1.sci.gsfc.nasa.gov/daac-bin/G3/gui.cgi?instance_id=GLDAS10_3HGlobal Land Data Assimilation System (GLDAS)CEOS IDN DIFVERSION 9.92017-01-232025-12-22NSIDCVersion SummaryVersion 2 includes 32 new files: 30 ".spread.nc" files which provide the difference in meters SWE from the highest and lowest observation of the component data sets; two climatological files. The climatological files indicate the climatological SWE or climatological spread in SWE for the 30-year period. In Version 1, December 31 was incorrectly dropped during a leap year. The Version 2 data corrected this by removing Feb. 29 from all years and reprocessing. Other changes to the data and metadata include meeting CF (Climate and Forecast) conventions.NSIDCMinor VersionNSIDCCurrent Version1NSIDCLevel of ServiceStandardNSIDCFull Dataset CitationMudryk, L. R. & Derksen, C. (2017). <i>CanSISE Observation-Based Ensemble of Northern Hemisphere Terrestrial Snow Water Equivalent</i>. (NSIDC-0668, Version 2). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/96ltniikJ7vd">https://doi.org/10.5067/96ltniikJ7vd</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/nsidc0668_swe_ensemble_v2