Data Set ID: 
G02203

Arctic Sea Ice Charts from Danish Meteorological Institute, 1893 - 1956, Version 1

These charts, created by the Danish Meteorological Institute (DMI), provide observed and inferred sea ice extent for each summer month from 1893 to 1956. From 1893 to 1956, the Danish Meteorological Institute (DMI) created charts of observed and inferred sea ice extent for each summer month. These charts are based on compiled observations of ice conditions reported by a variable network of national organizations, shore-based observers, scientific expeditions, and ships as detailed in each report; in cases where no observations were available, the lead mapmakers extrapolated further ice cover using their knowledge of ice movement. Except for where direct observations are indicated, caution is advised in using the charts’ ice edge because there is no way to quantify the assumptions used in extrapolating ice edge or the error involved in this method. See the note on reliability for further discussion of potential error. The charts were scanned at the Icelandic Meteorological Office (IMO) and are being made available here as a service and in cooperation with DMI and other contributors. In all, there are 266 image files containing 291 images.

This is the most recent version of these data.

Parameter(s):
  • Sea Ice > Ice Extent > ICE EXTENT
  • Sea Ice > Sea Ice Concentration > SEA ICE CONCENTRATION
Data Format(s):
  • JPEG
Spatial Coverage:
N: 90, 
S: 55, 
E: 180, 
W: -180
Platform(s):GROUND-BASED OBSERVATIONS, SHIPS
Spatial Resolution:Not SpecifiedSensor(s):VISUAL OBSERVATIONS
Temporal Coverage:
  • 1 April 1893 to 31 August 1956
Version(s):V1
Temporal ResolutionNot specifiedMetadata XML:View Metadata Record
Data Contributor(s):Danish Meteorological Institute and National Snow and Ice Data Center. Compiled by V. Underhill and F. Fetterer.

Geographic Coverage

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Danish Meteorological Institute and National Snow and Ice Data Center. Compiled by V. Underhill and F. Fetterer. 2012. Arctic Sea Ice Charts from Danish Meteorological Institute, 1893 - 1956, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N56D5QXC. [Date Accessed].

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