permafrost
51permafrost — n. subsoil which remains below freezing point throughout the year, as in polar regions. Etymology: PERMANENT + FROST …
52discontinuous permafrost — Permafrost occurring in some areas beneath the exposed land surface throughout a geographic region where other areas are free of permafrost. Compare: continuous permafrost, sporadic permafrost. NRC …
53continuous permafrost — Permafrost occurring everywhere beneath the exposed land surface throughout a geographic region. Compare: discontinuous permafrost, sporadic permafrost. NRC …
54International Permafrost Association — The International Permafrost Association (IPA), founded in 1983, has as its objectives to foster the dissemination of knowledge concerning permafrost and to promote cooperation among persons and national or international organisations engaged in… …
55Beyond the Permafrost — Infobox Album | Name = Beyond the Permafrost Type = Album Artist = Skeletonwitch Released = 2007 Recorded = 2007 Genre = Thrash metal Black metal Label = Prosthetic Records Producer = Corey Smoot and Skeletonwitch Reviews = *AbsolutePunk.net… …
56sporadic permafrost — The area near the southern boundary of discontinuous permafrost where permafrost occurs in isolated patches or islands. Compare: continuous permafrost, discontinuous permafrost. NRC …
57discontinuous permafrost — between 50˚N and the Arctic Circle where mean annual temperature is 1˚ to 5˚ there will be patches of permanent permafrost perhaps 50 metres deep, separated by areas of little or no permafrost which are kept warmer by local conditions such as… …
58continuous permafrost — within the Arctic Circle average temperatures rarely rise above zero. Water in the ground generally remains frozen apart from some superficial summer melting of perhaps the top few centimeters. The permafrost can be several hundred metres deep… …
59inter-permafrost karst — See permafrost karst; subpermafrost karst …
60thaw-sensitive permafrost — Perennially frozen ground which, upon thawing, will experience significant thaw settlement and suffer loss of strength to a value significantly lower than that for similar material in an unfrozen condition. Compare: thaw stable permafrost.… …
