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Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001

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Entry ID

GGD650

Summary

This data set contains monthly values of the total exposed land area of seasonally frozen ground and annual values for intermittently frozen ground in the Northern Hemisphere. Seasonally frozen ground is defined as the near-surface soil that experiences freeze for more than 15 days per year, while intermittently frozen ground experiences fewer than 15 days of freeze per year. The values were calculated based upon the monthly mean air temperature from the 1901-2002, 0.5 deg. global land temperatures from the University of East Anglia Climate Research Unit (Mitchell and Jones, 2005) using the technique described by Zhang, et al. (2003).

Two ASCII files are available. One file contains monthly values of seasonally frozen ground area in square kilometers for 1901-2001. The other file contains annual values of intermittently frozen ground area. Data are available via FTP.

Geographic Coverage

 

Spatial Coordinates:
N: 90°     S: 0°     E: 180°     W: -180°    

Data Set Citation

Dataset Creator: T. Zhang, J. Smith
Dataset Title: Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001
Dataset Release Date: 2006-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/ggd650.html

Temporal Coverage

Start Date: 1901-01-01
Stop Date: 2002-12-31

Data Resolution

Latitude Resolution: 25 km
Longitude Resolution: 25 km
Temporal Resolution: 1 year

Location Keywords

  • GEOGRAPHIC REGION ARCTIC

Science Keywords

  • Cryosphere Frozen Ground Seasonally Frozen Ground
  • Land Surface Frozen Ground Seasonally Frozen Ground Freezing/Thawing Index

Ancillary Keywords

  • intermittently frozen ground

ISO Topic Category (View Definitions)

  • Geoscientific Information

Data Set Progress

complete

Originating Center

FGDC

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Frozen Ground Data Center
Data Center URL: http://nsidc.org/fgdc/

Data Center Personnel

Name: FGDC User Services
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Size: 20 KB
Distribution Format: ASCII Text (.txt)

Personnel

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Tingjun Z Zhang
Role: INVESTIGATOR
Phone: 1 303 492-6199 x
Fax: 1 303 492-2359 x
Email: nsidc@nsidc.org
Contact Address:

  • University of Colorado
  • National Snow and Ice Data Center/World Data Center for Glaciology
  • UCB449

City: Boulder
Province or State: Colorado
Postal Code: 80309-0449
Country: USA

Related URL

VIEW RELATED INFORMATION
All About EASE-Grid

Reference

Zhang, T., R. G. Barry, K. Knowles, F. Ling, and R. L. Armstrong. 2003. Distribution of seasonally and perennially frozen ground in the Northern Hemisphere. in Phillips, M., S. M. Springman, and L. U. Arenson (editors). 2003. Permafrost: Proceedings of the Eighth International Conference on Permafrost, 21-25 July 2003, Zurich, Switzerland. Lisse, The Netherlands: A.A. Balkema. Mitchell T. D. and P. D. Jones. 2005. An improved method of constructing a database of monthly climate observations and associated high-resolution grids. International Journal of Climatology 25, 693-712.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2006-01-01
Last DIF Revision Date: 2012-09-18

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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