2026-07-27T07:11:01Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/G10007.0012026-02-17T20:03:16Zv0_otherv0_allnoaa
G10007.001Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956Underhill, V., Fetterer, F. & Petersen, C.Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-19562014-01-31Boulder, Colorado USANSIDC: National Snow and Ice Data Center1false10.7265/N5MP517Mhttps://dx.doi.org/10.7265/N5MP517MG10007Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECRYOSPHERESEA ICEICE EXTENT EARTH SCIENCECRYOSPHERESEA ICESEA ICE CONCENTRATION Climatology/Meteorology/AtmosphereMAPS/CHARTSSea Ice Observations and Charts-projectVISUAL OBSERVATIONSVISUAL OBSERVATIONSFIELD SURVEYSFIELD SURVEYSGROUND-BASED OBSERVATIONSGROUND-BASED OBSERVATIONSShips1901-04-011939-08-311946-04-011956-08-31complete5590-180180OCEANARCTIC OCEANThese 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.EnglishNOAANational 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 ColoradoBoulderCO80309-0449USAHTTPSJPEGHTTPSShapefileHTTPSnetCDF-4HTTPSPNGBarry, R. 2000. Data on the Geographical Distribution of Sea Ice. EWG Sea Ice Atlas on CD - ROM data set. Rpt. in NSIDC Special Report 15. 2013. Ed. A. Windnagel and F. Fetterer. NSIDC, Boulder, CO.
Chapman, W.L., and J.E. Walsh. 1991, updated 1996. Arctic and Southern Ocean sea ice concentrations. Boulder, CO: National Snow and Ice Data Center.
Danish Meteorological Institute 1982. International Ice Symbols: The Egg Code. DMI Greenland Ice Branch Copenhagen, Denmark: 10pp. Accessed 16 January 2014 from http://en.vedur.is/media/hafis/frodleikur/sea-ice_symbols.pdf.
Dehn, W. S. 1979. Inadequacies in Archive Sea Ice Data. Glaciological Data Report : Workshop on Snow Cover and Sea Ice Data. GD-5 p 101-106. World Data Center A for Glaciology (Snow and Ice). Boulder, CO.
Koch, L. 1945. The East Greenland Ice. Meddelelser om Grønland 130(30): 18-24.
Kelly, P.M. 1978. An Arctic Sea Ice Data Set: 1901-1956. Climate Monitor 7(5): 161-163.
Kelly, P. M. 1979. An Arctic Sea Ice Data Set: 1901-1956. Glaciological Data Report : Workshop on Snow Cover and Sea Ice Data. GD-5 p 101-106. World Data Center A for Glaciology (Snow and Ice). Boulder, CO.
Walsh, J.E. (1978) A data set on Northern Hemisphere sea ice extent. National Snow and Ice Data Center, "Glaciological Data, Report GD-2", part 1, pp. 49 - 51.
Sear, C. B. 1988. An Index of Sea Ice Variations in the Nordic Seas. Int. J. Climatology 8(4): 339-55.
Thomsen, H. 1947. The Annual Reports on the Arctic Sea Ice issued by the Danish Meteorological Institute. J. of Glaciology 1(3): 140-141.
WMO. 1989. Sea-Ice Nomenclature and International System of Sea Ice Symbols. WMO No. 259, Supplement No. 5; April 1989. Accessed 14 January 2014 from http://www.aari.ru/gdsidb/XML/wmo_259.php.
This data set provides estimates of Arctic sea ice extent and concentration from 1901 to 1956 created from a collection of historic, hand-drawn sea ice charts from the Danish Meteorological Institute (DMI). These were used to create estimates for each summer month from 1901 to 1956 by manual, subjective interpretation of scanned versions of the charts. These estimates, shown in colored-coded fields, are available as GIS shapefiles, gridded NetCDF files, and browse image files.VIEW RELATED INFORMATIONhttps://dx.doi.org/10.7265/N5MP517MGET DATAhttps://noaadata.apps.nsidc.org/NOAA/G10007/HTTPSCEOS IDN DIFVERSION 9.92014-01-312026-02-17NSIDCVersion SummaryNSIDCMinor Version1.1Added a gridded product in NetCDF format.0NSIDCUpdate Frequency2023NSIDCCurrent Version1NSIDCSpatial Reference SystemsEPSG:4326WGS 84NSIDCLevel of ServiceStandardNSIDCFull Dataset CitationUnderhill, V., Fetterer, F. & Petersen, C. (2014). <i>Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956</i>. (G10007, Version 1). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. <a href="https://doi.org/10.7265/N5MP517M">https://doi.org/10.7265/N5MP517M</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/G10007/