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Data Set ID:

Arctic EASE-Grid Freeze and Thaw Depths, 1901 - 2002, Version 1

This data set contains mean, median, minimum and maximum freeze and thaw depths for each year from
1901 to 2002 on the 25 km resolution Equal-Area Scalable Earth Grid (EASE-Grid) for areas north of 50
deg. Freeze and thaw depths are estimated using a variant of the Stefan solution using an edaphic factor
and freezing or thawing indices as inputs. The edaphic factor is estimated based on different land surface
types; the freezing and thawing indices are from Northern Hemisphere EASE-Grid annual freezing
and thawing indices, 1901 - 2002 (Zhang, et al. 2005).

Two ASCII files are available for each year for freeze depth and thaw depth, respectively. Each file is
approximately 25.6 MB in size. In addition, there is one 10.5 MB ASCII file defining the latitude and longitude coordinates for each grid point. The data set is available via FTP as three compressed files.

Geographic Coverage

Spatial Coverage:
  • N: 90, S: 50, E: 180, W: -180

Spatial Resolution: Not Specified
Temporal Coverage:
  • 1 January 1901 to 31 December 2002
Temporal Resolution: Not specified
  • Frozen Ground > Active Layer
  • Frozen Ground > Active Layer > Freeze/Thaw Depth
Platform(s) Not specified
Sensor(s): Not specified
Data Format(s):
  • ASCII Text (.txt)
Version: V1
Data Contributor(s): Tingjun Zhang, R. Barry

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.

Zhang, T., J. McCreight, and R.G. Barry 2006. Arctic EASE-Grid Freeze and Thaw Depths, 1901 - 2002, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. [Date Accessed].
Questions? Please contact:

NSIDC User Services
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