2026-05-26T16:14:13Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/G02156.0012026-02-17T20:03:07Zv0_otherv0_allnoaa
G02156.001IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km ResolutionsU.S. National Ice CenterIMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions2008-01-01Boulder, Colorado USANSIDC: National Snow and Ice Data Center1false10.7265/N52R3PMChttps://dx.doi.org/10.7265/N52R3PMCG02156InvestigatorTechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECRYOSPHERESNOW/ICEICE EXTENT EARTH SCIENCECRYOSPHERESNOW/ICESNOW COVER OceansClimatology/Meteorology/AtmosphereIMSInteractive Multisensor Snow and Ice Mapping SystemNOAANOAA SSD snow productsNorthern HemisphereNumerical Weather PredictionSea Ice ConcentrationSea Ice Prediction Network-projectSea Ice Visible/Infrared-projectSIPN-projectSIPN sea ice-projectAMSU-AAdvanced Microwave Sounding Unit-AATMSAdvanced Technology Microwave SounderAVHRRAdvanced Very High Resolution RadiometerGOES I-M IMAGERMODISModerate-Resolution Imaging SpectroradiometerMTSAT 1R ImagerMTSAT 2 ImagerMVIRIMeteosat Visible Infra-Red Imager SARSynthetic Aperture RadarSEVIRISpinning Enhanced Visible and Infrared ImagerSSM/ISpecial Sensor Microwave/ImagerSSMISSpecial Sensor Microwave Imager/SounderVIIRSVisible-Infrared Imager-Radiometer SuiteAQUAEarth Observing System, AQUADMSPDefense Meteorological Satellite ProgramDMSP 5D-3/F17Defense Meteorological Satellite Program-F17GOES-10Geostationary Operational Environmental Satellite 10GOES-11Geostationary Operational Environmental Satellite 11GOES-13Geostationary Operational Environmental Satellite 13GOES-9Geostationary Operational Environmental Satellite 9METEOSATMeteosat Operational ProgrammeMSGMeteosat Second GenerationMTSAT-1RMulti-functional Transport Satellite 1 ReplacementMTSAT-2The Multi-functional Transport Satellite 2NOAA-14National Oceanic & Atmospheric Administration-14NOAA-15National Oceanic & Atmospheric Administration-15NOAA-16National Oceanic & Atmospheric Administration-16NOAA-17National Oceanic & Atmospheric Administration-17NOAA-18National Oceanic & Atmospheric Administration-18NOAA-NNational Oceanic and Atmospheric Administration - NRADARSAT-2SUOMI-NPPSuomi National Polar-orbiting PartnershipTERRAEarth Observing System, TERRA (AM-1)1997-02-05active090-180180Geographic RegionNorthern Hemisphere24 km24 km1 day1 km1 km1 dayThe quality of the snow and ice cover charts will depend on the availability of clear sky imagery, the georegistration of that imagery, the quality of other input data sources, and the experience of the analyst. Regions covered by cloud during the 24-hour analysis period are generally mapped as persistence, taking lower resolution passive microwave data and surface observations into account where possible. Sub-grid scale features may not be detected.These data are freely, openly, and fully accessible without restrictions.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. Near-real-time data provide an estimate of conditions based on information and algorithms available at the time the data are collected (typically within 24 hours). They are processed as data become available, and are not reviewed prior to release.EnglishNOAANOAANational Oceanic and Atmospheric Administrationhttp://nsidc.org/noaa/Data Center ContactNOAAUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAFTPGIFFTPNetCDFFTPGeoTIFFFTPASCIIArmstrong, R.L. and M.J. Brodzik. 2002. Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 2. Boulder, CO, USA: National Snow and Ice Data Center. CD-ROM.
National Operational Hydrologic Remote Sensing Center. 2004. SNODAS Data Products at NSIDC. Boulder, CO: National Snow and Ice Data Center. Digital media.
Ramsey, B. H., 1995. An Overview of NOAA/NESDIS’s Interactive Multisensor Snow and Ice Mapping System. Proceedings of 1995 First Moderate Resolution Imaging Spectrometer (MODIS) Workshop, Greenbelt, MD, National Aeronautics and Space Administration Conference Publication 3318: 23-27.
Ramsey, B. H., 1998. The Interactive Multisensor Snow and Ice Mapping System. Hydrological Processes. Vol. 12: 1537-1546.
Robinson, D.A. 2000. Weekly Northern Hemisphere snow maps: 1966-1999. 12th Conference on Applied Climatology, Asheville, NC, American Meteorological Society. 12-15.
Robinson, D.A. and A. Frei. 2000. Seasonal variability of northern hemisphere snow extent using visible satellite data. Professional Geographer 51: 307-314.
Robinson, D.A., J.D. Tarpley and B. Ramsay. 1999. Transition from NOAA weekly to daily hemispheric snow charts. Proceedings of the 10th Symposium on Global Change, Dallas, TX, American Meteorological Society. 487-490.This data set provides maps of snow cover and sea ice for the Northern Hemisphere from February 1997 to the present from the United States National Ice Center (USNIC). USNIC analysts produce these using the Interactive Multisensor Snow and Ice Mapping System (IMS). Maps are derived from a variety of data products including satellite imagery and in situ data. The data are provided in ASCII text, GeoTIFF, and NetCDF formats in three different resolutions: 1 km, 4 km, and 24 km.
Note: The IMS product is considered an operational product; however, USNIC, who creates this product, does not guarantee availability or timely delivery of data via the NIC Web server. NSIDC, as the data archive, does not guarantee availability of this product via the NSIDC Web server. These servers should not be used to support operational observation, forecasting, emergency, or disaster mitigation operations, either public or private. Users with real-time operational needs should visit the USNIC Web site and contact the USNIC Liaison to request access to their operational server.VIEW RELATED INFORMATIONhttps://dx.doi.org/10.7265/N52R3PMCDocumentationGET DATAhttps://noaadata.apps.nsidc.org/NOAA/G02156/HTTPSVIEW RELATED INFORMATIONhttp://nsidc.org/data/g01962.htmlEnvironmental Working Group Joint US-Russian Sea Ice AtlasVIEW RELATED INFORMATIONhttp://nsidc.org/data/g02158.htmlSnow Data Assimilation System (SNODAS)VIEW RELATED INFORMATIONhttp://nsidc.org/data/nsidc-0046.htmlNorthern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 2PROJECT HOME PAGEhttp://nsidc.org/data/seaice/Sea Ice Data at NSIDCPROJECT HOME PAGEhttp://www.natice.noaa.gov/ims/U.S. National Ice CenterVIEW RELATED INFORMATIONhttp://nsidc.org/data/g02168.htmlTiming and Statistics of Autumn and Spring Annual Snow Cover for the Northern HemisphereCEOS IDN DIFVERSION 9.92008-01-012026-02-17NSIDCVersion SummaryInitial releaseNSIDCMinor Version1Initial release of this data set at a 24 km resolution.1997-02-042004-02-2202Second release of this data set. Major change is the addition of a 4 km resolution product.2004-02-232014-12-0203Third release of this data set. Major changes are the addition of a 1 km resolution product and new input data sources.
Version 1.3 Summary:
* New data sources: See Table 12 for a list of the new data sources for version 1.3.
* Addition of 1 km product: A 1 km ASCII file and GeoTIFF file are now available.
* Change to GeoTIFFs: The GeoTIFF files now have their projection information within the GeoTIFF file itself instead of in an extra .aux file. These files are now compressed using gzip instead of zip.2014-12-030NSIDCUpdate Frequencyupdated dailyNSIDCCurrent Version1NSIDCLevel of ServiceComprehensiveNSIDCFull Dataset CitationU.S. National Ice Center. (2008). <i>IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions</i>. (G02156, Version 1). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. <a href="https://doi.org/10.7265/N52R3PMC">https://doi.org/10.7265/N52R3PMC</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredfalseNSIDCRelated Servicesapplication/vnd.nasa.cmr.umm+jsonfalsejroebuckmmt_service_32962S2721063021-NSIDCV0NSIDCV01service2023-06-27T14:22:11.750Zhttps://noaadata.apps.nsidc.org/NSIDCV0_NOAA_Data_HTTPS_File_SystemNOT PROVIDED1NOAA@NSIDC HTTPS File SystemAccess and download NOAA@NSIDC data using a web browser, or through a command line utility such as WGET, or using programming languages such as R or Python.https://nsidc.org/data/user-resources/help-center/how-access-and-download-noaansidc-dataVIEW RELATED INFORMATIONNOAA@NSIDC HTTPS Access GuidePublicationURLUSER SERVICESNSIDC User ServicesEmailnsidc@nsidc.orgDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESThis is the most current release of this service.AUTHORDEVELOPERPUBLISHERSERVICE PROVIDERNational Oceanic and Atmospheric Administration at the National Snow and Ice Data CenterNSIDC_NOAAhttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://noaadata.apps.nsidc.org/NOAA/G02156/