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Data Set ID:
G10010

Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, Version 1

Observations from historical sources are the basis of this monthly gridded sea ice concentration product that begins in 1850. In 1979, these sources give way to a single source: concentration from satellite passive microwave data. The historical observations come in many forms: ship observations, compilations by naval oceanographers, analyses by national ice services, and others. Monthly sea ice concentration is given in a 1/4 degree latitude by 1/4 degree longitude grid. In addition to the concentration array, for each month a corresponding source array indicates where each of 16 possible sources is used. The file of concentration and source arrays conforms to NetCDF-4 standards.

Version Summary:

Initial data release.

Geographic Coverage

Parameter(s):
  • Sea Ice > Sea Ice Concentration
Spatial Coverage:
  • N: 89.9, S: 30.1, E: 180, W: -180

Spatial Resolution:
  • 1/4 degree x 1/4 degree
Temporal Coverage:
  • 1 January 1850 to 31 December 2013
Temporal Resolution: 1 month
Data Format(s):
  • NetCDF
Platform(s) DMSP, SHIPS
Sensor(s): SSM/I, VISUAL OBSERVATIONS
Version: V1
Data Contributor(s): John Walsh, William Chapman, Florence Fetterer
Data Citation

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.

Walsh, J. E., W. L. Chapman, and F. Fetterer. 2015. Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5833PZ5. [Date Accessed].
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