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Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001 Entry ID: ggd650 |
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Summary
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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.
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Related URL
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Link:
VIEW RELATED INFORMATION
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Geographic Coverage
| N: 90.0 | S: 0.0 | E: 180.0 | W: -180.0 |
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Data Set Citation
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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, CO Dataset Publisher: National Snow and Ice Data Center/World Data Center for Glaciology, Boulder, CO |
Temporal Coverage
| Start Date: 1901-01-01 |
| Stop Date: 2002-12-31 |
Location Keywords
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GEOGRAPHIC REGION
> ARCTIC
GEOGRAPHIC REGION > POLAR |
Data Resolution
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Latitude Resolution:
25 km
Longitude Resolution: 25 km Temporal Resolution: annual |
Science Keywords
| CRYOSPHERE >FROZEN GROUND >SEASONALLY FROZEN GROUND [Definition] |
| LAND SURFACE >FROZEN GROUND >SEASONALLY FROZEN GROUND >FREEZING/THAWING INDEX [Definition] |
ISO Topic Category
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GEOSCIENTIFIC INFORMATION
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Keywords
| intermittently frozen ground |
Data Set Progress
| COMPLETE |
Originating Center
| NSIDC_FGDC |
Data Center
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National Snow and Ice Data Center
[Information]
Data Center URL: http://nsidc.org
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World Data Center for Glaciology, Boulder
[Information]
Data Center URL: http://nsidc.org/wdc/ Dataset ID: GGD650
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Frozen Ground Data Center
[Information]
Data Center URL: http://nsidc.org/fgdc/ Dataset ID: GGD650
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Distribution
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Distribution_Media:
FTP
Distribution_Size: 20 KB Distribution_Format: ASCII text |
Personnel
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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 |
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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 |
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
Last DIF Revision Date:
2011-01-24
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