EC: PERMAFROST
Status:
STD 2005/06/07
Code:
855
Concept definition:
A layer of <
SOIL
> or <
BEDROCK
> at a variable <<
DEPTH_BELOW_SURFACE_LEVEL
>> beneath the <
SURFACE
> of the <
LAND
> in which the <<
TEMPERATURE
>> has been below freezing continuously from a few to thousands of years; permafrost.
Reference type:
IR
Reference:
[
SP35
, "permafrost"]
Supplemental references:
Group membership:
PHYSIOGRAPHY
SURFACE_MATERIAL
TEMPERATURE
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