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Term: Permafrost base Class:  
 vernacular   (0%)
Created 6 June 2017
Last modified 6 June 2017
Contributed by GCW Glossary

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Definition: The lower boundary surface of permafrost, above which temperatures are perennially below 0 degrees Celsius (cryotic) and below which temperatures are perennially above 0 degrees Celsius (noncryotic).  NSIDCCryosphere 

The lower boundary surface of permafrost, above which temperatures are perennially below 0˚C (cryotic) and below which temperatures are perennially above 0˚C (noncryotic)  IPAPermafrost 

The lower boundary surface of Permafrost, above which temperatures are perennially below 0C (cryotic) and below which temperature are perennially above 0C (non-cryotic).  TrombottoGeocryology 

 GCW 
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