residual thaw layer
Link: http://w3id.org/permafrost/v/ipaglossary/t0274
Within: IPA Permafrost Glossary
Definition: A layer of thawed ground between the seasonally frozen ground and the permafrost table (see Figure 4).
| Term |
residual thaw layer
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couche dégelée résiduelle fr |
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| Comment |
This layer may result from thawing of the permafrost which causes a lowering of the permafrost table, or from incomplete freezing of the active layer during a mild winter after a very warm summer, or during a winter in which an unusually heavy snowfall (providing a thick insulating cover on the ground surface) occurs before extreme cold sets in. It may exist for one year or for several years, or it may be permanent if permafrost is degrading due to climatic warming or changes in terrain conditions resulting from natural or human disturbance or activity. This layer does not exist where the seasonal frost extends to the permafrost table.
en
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| dcterms:source |
https://doi.org/10.4224/20386561
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