- active layer
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(in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer.
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Universalium. 2010.
active layer
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Active layer — In environments containing permafrost, the active layer is the top layer of soil that thaws during the summer and freezes again during the autumn. In all climates, whether they contain permafrost or not, the temperature in the lower levels of the … Wikipedia
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active layer — The top layer of ground subject to annual thawing and freezing in areas underlain by permafrost. NRC … Glossary of landform and geologic terms
active layer — (in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer … Useful english dictionary
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