discontinuous permafrost


discontinuous permafrost
   Permafrost occurring in some areas beneath the exposed land surface throughout a geographic region where other areas are free of permafrost.
   NRC

Glossary of landform and geologic terms. 2013.

Look at other dictionaries:

  • discontinuous 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… …   Geography glossary

  • 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 — /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 —    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 —   frozen ground. Varies widely in scope and depth and in the period of the year for which it exists. A common feature of periglacial environments. See continuous permafrost, discontinuous permafrost and sporadic permafrost …   Geography glossary

  • continuous permafrost —    Permafrost occurring everywhere beneath the exposed land surface throughout a geographic region.    Compare: discontinuous permafrost, sporadic permafrost.    NRC …   Glossary of landform and geologic terms

  • sporadic permafrost —    The area near the southern boundary of discontinuous permafrost where permafrost occurs in isolated patches or islands.    Compare: continuous permafrost, discontinuous permafrost.    NRC …   Glossary of landform and geologic terms

  • 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

  • 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

  • Arctic ecology — is the scientific study of the relationships between biotic and abiotic factors in the arctic, the region north of theArctic Circle (66 33’). This is a region characterized by stressful conditions as a result of extreme cold, low precipitation, a …   Wikipedia