The process of getting data has improved!  Click the Download Data tab below to view all options for retrieving data. Read all about the new layout here.
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.

This is the most recent version of these data.

Version Summary:

Initial data release.

Parameter(s):
  • Sea Ice > Sea Ice Concentration
Data Format(s):
  • NetCDF
Spatial Coverage:
N: 89.9, 
S: 30.1, 
E: 180, 
W: -180
Platform(s):DMSP, SHIPS
Spatial Resolution:
  • 1/4 degree x 1/4 degree
Sensor(s):SSM/I, VISUAL OBSERVATIONS
Temporal Coverage:
  • 1 January 1850 to 31 December 2013
(updated 2016)
Version(s):V1
Temporal Resolution1 monthMetadata XML:View Metadata Record
Data Contributor(s):John Walsh, William Chapman, Florence Fetterer

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.

FTP data can be downloaded through a Web browser or command line via FTP. For help downloading data through an FTP client, go to the How to access data using an FTP client support page.

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, updated 2016. 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: https://doi.org/10.7265/N5833PZ5. [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 technical references available for this data set.
No FAQs or How Tos available for this data set.

Access complete Knowledge Base