Data Set ID:

Nimbus-5 ESMR Polar Gridded Sea Ice Concentrations, Version 1

Daily and monthly averaged sea ice concentrations from the Nimbus-5 Electrically Scanning Microwave Radiometer (ESMR) are available for the Arctic and Antarctic from 12 December 1972 through 31 December 1976 at 25 km gridded resolution. Raw data were reprocessed to include ocean masks that reduce weather effects and coastal contamination, and to include a 15 percent ice threshold. Reprocessed data are in Hierarchical Data Format (HDF) and are available via FTP.

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Geographic Coverage

Data Set Tabs

Spatial Coverage:
  • N: -39.23, S: -90, E: 180, W: -180

  • N: 90, S: 30.98, E: 180, W: -180

Spatial Resolution:
  • 25 km x 25 km
  • 25 km x 25 km
Temporal Coverage
  • 1972-12-12 to 1976-12-31
Temporal Resolution:
1 month, 1 day
  • Sea Ice > Sea Ice Concentration
Data Format(s):
  • HDF
Data Contributor(s): Josephino 'Joey' Comiso, H. Zwally, Claire Parkinson

Data Citation

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

Parkinson, C. L., J. C. Comiso, and H. J. Zwally. Edited by W. Meier and J. Stroeve. 2004. Nimbus-5 ESMR Polar Gridded Sea Ice Concentrations, Version 1. [indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. [Date Accessed].

Questions? Please contact:

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Phone: 1 303 492-6199
Fax: 1 303 492-2468
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA