GGD650
Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001
T. Zhang, J. Smith
Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001
2006-01-01
Boulder, Colorado USA
NSIDC: National Snow and Ice Data Center
http://nsidc.org/data/ggd650.html
Technical Contact
NSIDC
User Services
nsidc@nsidc.org
1 303 492-6199 x
1 303 492-2468 x
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
Investigator
Tingjun
Z
Zhang
nsidc@nsidc.org
1 303 492-6199 x
1 303 492-2359 x
University of Colorado
National Snow and Ice Data Center/World Data Center for Glaciology
UCB449
Boulder
Colorado
80309-0449
USA
EARTH SCIENCE
Cryosphere
Frozen Ground
Seasonally Frozen Ground
EARTH SCIENCE
Land Surface
Frozen Ground
Seasonally Frozen Ground
Freezing/Thawing Index
Geoscientific Information
intermittently frozen ground
1901-01-01
2002-12-31
complete
0
90
-180
180
GEOGRAPHIC REGION
ARCTIC
25 km
25 km
1 year
English
NSIDC_FGDC
NSIDC
National Snow and Ice Data Center
http://nsidc.org
Data Center Contact
NSIDC
User Services
nsidc@nsidc.org
1 303 492-6199
1 303 492-2468
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
NSIDC_FGDC
NSIDC Frozen Ground Data Center
http://nsidc.org/fgdc/
Data Center Contact
NSIDC FGDC
User Services
nsidc@nsidc.org
1 303 492-6199
1 303 492-2468
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
FTP
20 KB
ASCII Text
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.
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.
VIEW RELATED INFORMATION
http://nsidc.org/data/ease/index.html
All About EASE-Grid
CEOS IDN DIF
9.7
2006-01-01
2012-09-18
deleted dupe URL in Related URL field