Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001  View Catalog Page 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°
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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
- Geoscientific Information
Data Set Progress
complete
Originating Center
NSIDC_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
NSIDC Frozen Ground Data Center
Data Center URL: http://nsidc.org/fgdc/
Data Center Personnel
Name: NSIDC FGDC 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
Distribution
Distribution Media: FTP
Distribution Size: 20 KB
Distribution Format: ASCII Text
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
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