Permafrost is ground that remains frozen for a period of two or more years.
These areas are commonly found at Earth's high latitudes near the North and South Poles. In the Northern Hemisphere, almost a quarter of the land area has permafrost below the surface layer.
Significantly, research indicates that the Arctic region—which is thought to contain around 1.6 billion tons of carbon in its permafrost—is warming around twice as fast the global average. In some cases, soils are even thawing for the first time in thousands of years. This kind of thawing is"fast and dramatic, affecting landscapes in unprecedented ways," Merritt Turetsky, lead author of the study from the University of Colorado Boulder and the University of Guelph, said in a statement."Forests can become lakes in the course of a month, landslides occur with no warning, and invisible methane seep holes can swallow snowmobiles whole."Miriam Jones, U.S.
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