permafrost


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per·ma·frost

 (pûr′mə-frôst′, -frŏst′)
n.
Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.

permafrost

(ˈpɜːməˌfrɒst)
n
(Physical Geography) ground that is permanently frozen, often to great depths, the surface sometimes thawing in the summer
[C20: from perma(nent) + frost]

per•ma•frost

(ˈpɜr məˌfrɔst, -ˌfrɒst)

n.
(in arctic or subarctic regions) permanently frozen subsoil.
[1943; perma (nent) frost]

per·ma·frost

(pûr′mə-frôst′)
A layer of permanently frozen subsoil, reaching depths up to 5,000 feet (1,524 meters). Permafrost is found throughout most of the polar regions.

permafrost

Permanently frozen subsoil.

permafrost

Permanently frozen ground found in polar and subpolar zones.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.permafrost - ground that is permanently frozenpermafrost - ground that is permanently frozen  
land, soil, ground - material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use); "the land had never been plowed"; "good agricultural soil"
Translations

permafrost

[ˈpɜːməfrɒst] Npermagel m

permafrost

permafrost

[ˈpɜːməˌfrɒst] npermafrost m inv
References in periodicals archive ?
Owing to the year-round permafrost, the building sits on a concrete slab with a system of 'thermosyphons' that dissipate heat and prevent melting.
31, 2015 /PRNewswire-USNewswire/ -- As part of a broad effort to study the environmental and societal effects of climate change, NASA has begun a multi-year field campaign to investigate ecological impacts of the rapidly changing climate in Alaska and northwestern Canada, such as the thawing of permafrost, wildfires and changes to wildlife habitats.
New research finds that as Arctic regions warm up, previously frozen ancient carbon, known as permafrost, is thawing and being released to inland streams and rivers.
The GlobPermafrost project will develop validate and implement information services to support research bodies international programmes and private or public organisations in their work on understanding permafrost better by integration of EO data.
A polar icecap or region of permafrost close to its melting point is at a tipping point.
One of the reasons 44 percent of the roads are unpaved is because it's simply less expensive to maintain dirt roads in those areas than to have to pave, patch, and repave them year after year because they've heaved, cracked, and settled from thawing and freezing ground, says Jeff Currey, a materials engineer for the Northern Region who designs road projects in an attempt to reduce impacts from permafrost.
An "alarming" melt in the permafrost released gas similar to a Champagne bottle popping, she suggested.
The installation and use of ground source heat pumps (GSHPs) for heating in Interior Alaska has substantially increased in recent years, raising questions about the efficiency and long-term performance of heat pump installations in areas of discontinuous permafrost and low annual temperatures.
Washington, April 8 ( ANI ): Researchers have found new evidence that permafrost thawing is releasing large quantities of greenhouse gases into the atmosphere via plants, which could accelerate warming trends.
After lying dormant in Siberian permafrost for 30,000 years, the largest virus ever discovered is just as deadly as it was when mammoths roamed the Earth.
The research team incubated a 30,000-year-old Siberian permafrost core sample taken from coastal tundra in Chukotka, near the East Siberia Sea, with acanthamoeba castellanii-a common host of giant viruses, Daily Mail reported.
A tricky challenge for moving Alaska's North Slope natural gas to market is designing a pipe that will remain safely buried for decades in hundreds of miles of chilled earth, permafrost and discontinuous permafrost.