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[pûŕmə-frôst́, -frŏst́]
(n.)Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
Dictionary.com · The American Heritage® Dictionary
Permafrost - Wikipedia, the free encyclopedia
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In geology, permafrost 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 present, as may be in the case of nonporous bedro...
en.wikipedia.org/wiki/Permafrost
Global perfrost conditions ... Permafrost, or permanently frozen ground, is soil, sediment, or rock that remains at or below 0°C for at least two years. It occurs both on land and beneath offshore Arctic continental shelves, and its thickness ranges from less than 1 meter to greater than 1,000 meters.
nsidc.org/sotc/permafrost.html nsidc.org/sotc/permafrost.html · Cached
Cold permafrost — Remains below 30° F, and which may be as low as 10° F as on the North Slope; tolerates introduction of considerable heat without thawing. ... Thaw-stable — Permafrost in bedrock, in well drained, coarse-grained sediments such as glacial outwash gravel, and in many sand and gravel mixtures.
www.alyeska-pipe.com/Pipelinefacts/Permafrost.html www.alyeska-pipe.com/Pipelinefacts/Permafrost.html · Cached
News results for permafrost
Thawing permafrost likely to hasten Arctic groundwater runoff · Mangalorean · January 2 1:42 AM  Explore Story »
Cold kills 17 on Indian plains · Arab News · January 1 4:28 PM
Cold wave sweeps parts of Orissa · NewKerala.com · January 2 10:45 AM
news.ask.com ·  More news articles »
Permafrost in Alaska - what better place to learn about something that is estimated to underlie one fifth of the world's land surface. ... Although many people living in more southerly regions have never heard of permafrost, it is not at all uncommon.
fairbanks-alaska.com/permafrost.htm fairbanks-alaska.com/permafrost.htm · Cached
Permafrost, the farthest north literary journal for writing and the arts accepts submissions between September 1 and March 31, distributing in the summer of each year.
www.alaska.edu/english/permafrost/ www.alaska.edu/english/permafrost/
Welcome to the IPA Website ... 25. September 2007 the IPA website was transferred to a new location: http://www.ipa-permafrost.org/ ... IPA International Permafrost Association...
www.geo.uio.no/IPA/ · Cached
A cross-section of permafrost shows an ice wedge hiding just below the surface ... Permafrost is not defined by soil moisture content, overlying snow cover, or location; it's defined solely by temperature. Any rock or soil remaining at or below 0°C for two or more years is permafrost. Permafrost can contain over 30...
www.solcomhouse.com/Permafrost.htm www.solcomhouse.com/Permafrost.htm · Cached