NSIDC-0063
Global Annual Freezing and Thawing Indices
Zhang, T.
Global Annual Freezing and Thawing Indices
1998-01-01
Boulder, Colorado USA
NSIDC: National Snow and Ice Data Center
http://nsidc.org/data/nsidc-0063.html
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
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
EARTH SCIENCE
Atmosphere
Atmospheric Temperature
Air Temperature
EARTH SCIENCE
Cryosphere
Snow/Ice
Freeze/Thaw
EARTH SCIENCE
Cryosphere
Snow/Ice
Permafrost
EARTH SCIENCE
Land Surface
Soils
Permafrost
EARTH SCIENCE
Terrestrial Hydrosphere
Snow/Ice
Freeze/Thaw
EARTH SCIENCE
Terrestrial Hydrosphere
Snow/Ice
Permafrost
Air Temperature
Cryosphere
Degree Days
Freeze
Frozen Ground
Frozen Soil
Ice Growth
Ice Melt
Permafrost
Snow Melt
Thaw
THERMISTORS
THERMOMETERS
complete
-90
90
-180
180
GEOGRAPHIC REGION
GLOBAL
EOSDIS
Earth Observing System Data Information System
ESIP
Earth Science Information Partners Program
English
NSIDC_DAAC
NASA DAAC at the National Snow and Ice Data Center
http://nsidc.org/daac/index.html
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
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
Legates, D. R. and C. J. Willmott, 1990: Mean Seasonal and Spatial Variability in Global Surface Air Temperature, Theoretical and Applied Climatology, 41(1-2).
The total annual freezing and thawing indices are defined as the cumulative number of degree-days when air temperatures are below and above zero degrees Celsius. The total annual freezing index has been widely used to predict permafrost distribution; estimate the maximum thickness of sea, lake, and river ice, and the maximum depth of ground-frost penetration; and classify snow types. The annual total thawing index has been used to predict permafrost distribution and to estimate the maximum depth of thaw in frozen ground. Both total freezing and thawing indices are important parameters for engineering design in cold regions.
Data coverage is global. The data set contains the total annual freezing and thawing indices with a spatial resolution of 0.5 degrees latitude by 0.5 degrees longitude. Two data files are available, for the freeze and thaw indices respectively, in flat binary format. Each file is approximately 1 MB in size. The total annual freezing and thawing indexes were calculated based upon the monthly mean air temperature by Legates and Willmott (1990).
USA/NASA
CEOS IDN DIF
9.7
1998-01-01
2012-07-26
added creator