Perennially frozen ground that maintains a temperature at or below the freezing point for at least two years. Vast tracts of permafrost lie across Alaska, Canada, northern Europe and Asia, and Antarctica. About 80 percent of Alaska’s land area contains permafrost. Greenland is almost totally covered with permafrost.
In geology, permafrost or permafrost soil is soil at or below the freezing point of water (0 ° C or 32 ° F) for two or more years. Ice is not always present, as may be in the ...
Permafrost Environmental Consulting (PEC) is a company that specializes in finding solutions to the environmental and geotechnical challenges presented by cold regions. <meta ...
Definition. Any rock or soil material that has remained below 32° F continuously for two or more years. The two-year minimum stipulation is meant to exclude from the ...
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