permafrost table

   The upper limit of permafrost [16].

A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. . 2002.

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  • permafrost table — the variable surface constituting the upper limit of permafrost. Cf. frostline (def. 2). * * * …   Universalium

  • permafrost table — the variable surface constituting the upper limit of permafrost. Cf. frostline (def. 2) …   Useful english dictionary

  • 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

  • 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

  • Gelisols — Gelisol a Gelisol profile Used in: USDA soil taxonomy Profile: OAC …   Wikipedia

  • Frost boil — Mud boils near Lapporten, Sweden Frost boils (also known as mud boils, frost scars and mud circles [1]) are upwellings of mud that occur through frost heave and cryoturbation in permafrost areas, such as arctic and alpine regions. They are… …   Wikipedia

  • Cryoturbation — Asphalt damaged by cryoturbation, or freezing of groundwater In gelisols (permafrost soils), cryoturbation (frost churning) refers to the mixing of materials from various horizons of the soil right down to the bedrock due to freezing and thawing …   Wikipedia

  • frostline — /frawst luyn , frost /, n. 1. the maximum depth at which soil is frozen. 2. the lower limit of permafrost. Cf. permafrost table. [1860 65, Amer.; FROST + LINE1] * * * …   Universalium

  • frostline — /frawst luyn , frost /, n. 1. the maximum depth at which soil is frozen. 2. the lower limit of permafrost. Cf. permafrost table. [1860 65, Amer.; FROST + LINE1] …   Useful english dictionary

  • FAO Soil Classification System — ▪ Table Soil classification system of the Food and Agriculture Organization   soil group  abbrevi ation defining  characteristics name derivation percent of Earth s land area See as table: Soils defined by parent material   Andosol AN volcanic… …   Universalium

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