Troy L. Péwé
Contributor
Emeritus Professor of Geology, Arizona State University, Tempe. President, International Permafrost Association, 1988–93. An authority on the geomorphology of polar regions. Editor of The Periglacial Environment: Past and Present.
Primary Contributions (1)
Permafrost, perennially frozen ground, a naturally occurring material with a temperature colder than 0 °C (32 °F) continuously for two or more years. Such a layer of frozen ground is designated exclusively on the basis of temperature. Part or all of its moisture may be unfrozen, depending on the…
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