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Parameter Tree:
EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > CRYOSOLS
Definition:
Soil formed in either mineral or organic materials having permafrost either
within 1 m below the surface or, if the soil is strongly cryoturbated, with 2 m
below the surface, and having a mean annual ground temperature below 0 deg C.
Reference:
National Snow and Ice Data Center (NSIDC). http://nsidc.org
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