2026-06-06T16:37:25Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/NSIDC-0622.0012025-12-22T21:19:05Zv0_daacv0_allnasa_nsidc_daac
NSIDC-0622.001Polar Stereographic Valid Ice Masks Derived from National Ice Center Monthly Sea Ice ClimatologiesMeier, W. N., Stroeve, J., Fetterer, F., Savoie, M. & Wilcox, H.Polar Stereographic Valid Ice Masks Derived from National Ice Center Monthly Sea Ice Climatologies2015-05-14Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center1false10.5067/M4PUJAQRI2DShttps://nsidc.org/sites/default/files/nsidc-0622-v001-userguide_1.pdfNSIDC-0622Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAInvestigatorWalterNMeierwalt@nsidc.orgBoudlerCO80309USAInvestigatorJulienneStroevestroeve@nsidc.orgNational Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309InvestigatorFlorenceFettererfetterer@nsidc.orgBoulderCOUSAInvestigatorMatthewSavoiesavoie@nsidc.orgCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAInvestigatorHannahWilcoxhannah.wilcox@nsidc.orgEARTH SCIENCECRYOSPHERESEA ICEICE EXTENT SEA ICEClimatology/Meteorology/AtmosphereIce MaskPassive MicrowaveAVHRRAdvanced Very High Resolution RadiometerDRIFTING BUOYSOLSOperational Linescan SystemSARSynthetic Aperture RadarSMMRScanning Multichannel Microwave RadiometerSSM/ISpecial Sensor Microwave/ImagerVISUAL OBSERVATIONSAIRCRAFTBUOYSDMSP 5D-2/F11Defense Meteorological Satellite Program-F11DMSP 5D-2/F13Defense Meteorological Satellite Program-F13DMSP 5D-2/F8Defense Meteorological Satellite Program-F8NOAA-11National Oceanic & Atmospheric Administration-11NOAA-14National Oceanic & Atmospheric Administration-14NOAA-15National Oceanic & Atmospheric Administration-15NOAA-7National Oceanic & Atmospheric Administration-7NOAA-9National Oceanic & Atmospheric Administration-9Nimbus-7Nimbus-7RADARSAT-2SHIPS1972-01-012007-12-31complete39.590-180180Geographic RegionArcticIdeally, a valid ice mask will only let real ice through. However, false detections are still possible within the bounds of the mask. Because this mask covers more area, in most cases, than would a passive microwave climatology-based mask, the area of falsely detected ice could be greater. However, the probability of removing valid ice is less with this mask. In addition, this mask does a better job of not allowing false ice due to land spillover along some coasts.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.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAFTP2.2 MBNetCDFCavalieri, D. J., K. M. St. Germain, and C. T. Swift. 1995. Reduction of Weather Effects in the Calculation of Sea Ice Concentration with the DMSP SSM/I. Journal of Glaciology. 41(139):455-464.These valid ice masks provide a way to remove spurious ice caused by residual weather effects and land spillover in passive microwave data. They are derived from the National Ice Center Arctic Sea Ice Charts and Climatologies data set and show where ice could possibly exist based on where it has existed in the past. There are 12 valid ice masks, one for each month, in netCDF-CF 1.6 compliant files with all associated metadata. The data are on a 304 x 448 grid and are available via FTP.VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/nsidc-0622-v001-userguide_1.pdfPolar Stereographic Valid Ice Masks Derived from National Ice Center Monthly Sea Ice Climatologies, Version 1 User GuideGET DATAhttps://daacdata.apps.nsidc.org/pub/DATASETS/nsidc0622_valid_seaice_masks/HTTPSCEOS IDN DIFVERSION 9.92015-05-142025-12-22NSIDCVersion SummaryInitial releaseNSIDCMinor VersionNSIDCCurrent Version1NSIDCSpatial Reference SystemsEPSG:3411NSIDC Sea Ice Polar Stereographic NorthNSIDCLevel of ServiceComprehensiveNSIDCFull Dataset CitationMeier, W. N., Stroeve, J., Fetterer, F., Savoie, M. & Wilcox, H. (2015). <i>Polar Stereographic Valid Ice Masks Derived from National Ice Center Monthly Sea Ice Climatologies</i>. (NSIDC-0622, 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/M4PUJAQRI2DS">https://doi.org/10.5067/M4PUJAQRI2DS</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/nsidc0622_valid_seaice_masks/