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perennially-frozen ground

См. также в других словарях:

  • 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

  • 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

  • Cryosphere — Overview of the Cryosphere and its larger components, from the UN Environment Programme Global Outlook for Ice and Snow. The cryosphere (from the Greek κρύος cryos cold , frost or ice ) is the term which collectively describes the portions of the …   Wikipedia

  • International 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… …   Wikipedia

  • Alaska — Alaskan, adj., n. /euh las keuh/, n. 1. a state of the United States in NW North America. 400,481; 586,400 sq. mi. (1,519,000 sq. km). Cap.: Juneau. Abbr.: AK (for use with zip code), Alas. 2. Gulf of, a gulf of the Pacific, on the coast of S… …   Universalium

  • Pleistocene Epoch — Earlier and longer of the two epochs that constitute the Quaternary Period. The Pleistocene began с 1.8 million years ago and ended с 10,000 years ago. It was preceded by the Pliocene Epoch of the Tertiary Period and followed by the Holocene… …   Universalium

  • pergelisol — |pərˈjeləˌsȯl, säl noun ( s) Etymology: permanent + Latin gelare to freeze + English i + Latin solum ground more at cold, soil : permanently or perennially frozen ground …   Useful english dictionary

  • river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …   Universalium

  • Cold Regions Research and Engineering Laboratory — Established 1 February 1961 (1 February 1961) Research Type …   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

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