permafrost thaw

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• Permafrost — This article is about frozen ground. For other uses, see Permafrost (disambiguation). In geology, permafrost, cryotic soil 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 …   Wikipedia

• permafrost —    Ground, soil, or rock that remains at or below 0 °C for at least two years. It is defined on the basis of temperature and is not necessarily frozen (i.e., cemented by ice).    Compare: continuous permafrost, discontinuous permafrost, sporadic… …   Glossary of landform and geologic terms

• permafrost — /perr meuh frawst , frost /, n. (in arctic or subarctic regions) perennially frozen subsoil. Also called pergelisol. [1943; PERMA(NENT) + FROST] * * * Perennially frozen earth, with a temperature below 32 °F (0 °C) continuously for two years or… …   Universalium

• Thaw depth — In soil science, the thaw depth or thaw line is the level down to which the permafrost soil will normally thaw each summer in a given area. The layer of soil over the thaw depth is calles the active layer, while the soil below is called inactive… …   Wikipedia

• thaw-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.… …   Glossary of landform and geologic terms

• thaw-stable permafrost —    Perennially frozen ground which, upon thawing, will not experience either significant thaw settlement or loss of strength.    Compare: thaw sensitive permafrost.    NRC …   Glossary of landform and geologic terms

• The Thaw — Jeepers Creepers 3: Cathedral Données clés Réalisation Mark A. Lewis Scénario Mark A. Lewis Michael Lewis Acteurs principaux Val Kilmer Martha MacIsaac Kyle Schmid Steph Long Aaron Ashmore Pays d’origine …   Wikipédia en Français

• Drunken trees — Not to be confused with the floss silk tree, also known as the drunken tree or palo borracho. A drunken forest in Siberia caused by melting permafrost. NASA photo. Drunken trees, tilted trees, or a drunken forest, is a stand of trees displaced… …   Wikipedia

• растепление многолетнемёрзлых пород — — [http://slovarionline.ru/anglo russkiy slovar neftegazovoy promyishlennosti/] Тематики нефтегазовая промышленность EN permafrost thaw …   Справочник технического переводчика

• 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

• glacial landform — ▪ geology Introduction  any product of flowing ice and meltwater. Such landforms are being produced today in glaciated areas, such as Greenland, Antarctica, and many of the world s higher mountain ranges. In addition, large expansions of present… …   Universalium