Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001
Entry ID: GGD650

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Summary
Abstract: 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.

Related URL
Link: VIEW RELATED INFORMATION
Description: All About EASE-Grid


Geographic Coverage
 N: 90.0 S: 0.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/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


Location Keywords
GEOGRAPHIC REGION > ARCTIC
GEOGRAPHIC REGION > NORTHERN HEMISPHERE
GEOGRAPHIC REGION > POLAR


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


Science Keywords
CRYOSPHERE >FROZEN GROUND >SEASONALLY FROZEN GROUND    [Definition]
LAND SURFACE >FROZEN GROUND >SEASONALLY FROZEN GROUND >FREEZING/THAWING INDEX    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Keywords
intermittently frozen ground


Data Set Progress
COMPLETE


Originating Center
NSIDC_FGDC


Data Center
National Snow and Ice Data Center    [Information]
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 at 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    [Information]
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 at 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
Fax: +1 (303) 492-2468
Email: nsidc at 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 ZHANG
Role: INVESTIGATOR
Phone: 303-492-6199
Fax: 303-492-2359
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
University of Colorado
CIRES, 449 UCB
City: Boulder
Province or State: Colorado
Postal Code: 80309-0449
Country: USA


Publications/References
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.

Creation and Review Dates
DIF Creation Date: 2006-01-01
Last DIF Revision Date: 2013-08-12

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