Data Set ID:
G10007

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

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 image files in JPEG format and as GIS shapefiles.

This is the most recent version of these data.

STANDARD Level of Service

Data: Data integrity and usability verified

Documentation: Key metadata and user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools

See All Level of Service Details

Parameter(s):
  • Sea Ice > Ice Extent > ICE EXTENT
  • Sea Ice > Sea Ice Concentration > SEA ICE CONCENTRATION
Data Format(s):
  • JPEG
  • Shapefile
Spatial Coverage:
N: 90, 
S: 55, 
E: 180, 
W: -180
Platform(s):FIELD SURVEYS, GROUND-BASED OBSERVATIONS, SHIPS
Spatial Resolution:Not SpecifiedSensor(s):VISUAL OBSERVATIONS
Temporal Coverage:
  • 1 April 1901 to 31 August 1939
  • 1 April 1946 to 31 August 1956
Version(s):V1
Temporal ResolutionNot specifiedMetadata XML:View Metadata Record
Data Contributor(s):Vivian Underhill, Florence Fetterer, Corey Petersen

Geographic Coverage

Would you like to receive updates and notifications regarding this data set? Subscribe below and stay informed. PLEASE NOTE: You only need to fill this form out once.

Most new versions of web browsers (Chrome, Firefox, Edge, and Safari) now block FTP addresses. We recommend trying to access the FTP using an FTP client, the command line or a python script. For further details on these options, see How to access data using an FTP client, the command line, wget or python?

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.

Underhill, V., F. Fetterer, and C. Petersen. 2014. Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N5MP517M. [Date Accessed].

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

No FAQs or How Tos available for this data set.

Access complete Knowledge Base

Questions? Please contact:
NSIDC User Services
Phone: 1 303 492-6199
Email: nsidc@nsidc.org