Definition of permafrost
: a permanently frozen layer at variable depth below the surface in frigid regions of a planet (such as earth)
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Recent Examples of permafrost from the Web
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In reality, specimens found in the thawing permafrost are... less cute.
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However, Claverie believes there is low risk of a global pandemic from these diseases in permafrost.
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Large numbers of the animals would also trample snow cover, stopping it from acting like insulation for the ground and allowing the permafrost to feel the effects of the bitter Arctic winters.
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In 15 years, the Arctic has experienced shrinking sea ice, melting permafrost, the general decimation of its habitat and other phenomena, captured in a video that compiles thousand of NASA satellite images.
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With already warmer temperatures, this leads to the melting of permafrost and the release of greenhouse gases like methane, Church said.
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Posey also asked how carbon dioxide could be captured in permafrost in the periods before humans existed.
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As researchers scramble to predict the effects of climate change on permafrost, Arctic people are already witnessing it, right beneath their feet.
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The solid permafrost that sits beneath many roads, buildings and pipelines is starting to thaw, destabilizing the infrastructure above.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'permafrost.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of permafrost
permanent + frost
PERMAFROST Defined for English Language Learners
Definition of permafrost for English Language Learners
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: a layer of soil that is always frozen in very cold regions of the world
Learn More about permafrost
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See words that rhyme with permafrost Britannica.com: Encyclopedia article about permafrost
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