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    • Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956, Version 1

    Metadata Updated: October 23, 2025

    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.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date October 23, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date October 23, 2025
    Publisher NSIDC
    Maintainer
    Identifier 10.7265/N5MP517M
    Data Last Modified 2025-09-10
    Category Earth Science
    Category Tag 16E15F51 D96E 4051 9124 75665Abdc6Ff "Arctic","Arctic Ocean, Sea Ice and Coasts"
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 0fe9609f-9e85-48ea-886a-d71e3be469df
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://noaadata.apps.nsidc.org/NOAA/G10007/
    Old Spatial "CARTESIAN",{"WestBoundingCoordinate":-180.0,"NorthBoundingCoordinate":90.0,"EastBoundingCoordinate":180.0,"SouthBoundingCoordinate":55.0}
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash 5ed70e3409d85eb459226fdb9b6cb6a9f1765ce5194e74cb5cac6c5938c3f329
    Source Schema Version 1.1
    Spatial

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