active permafrost

active permafrost

[′ak·tiv ′pər·mə‚frȯst]
(geology)
Permanently frozen ground (permafrost) which, after thawing by artificial or unusual natural means, reverts to permafrost under normal climatic conditions.
References in periodicals archive ?
Using the DGGE primers for amplification of methanogenic archaea, we recovered two sequences affiliated to MCG within Crenarchaeota from the topmost layer of the active permafrost, where the organic carbon content is very high (9.01%).