In geology, permafrost is ground, including rock or (cryotic) soil, with a temperature that remains at or below the freezing point of water 0 °C (32 °F) for two or more years.

Permafrost, perennially frozen ground, a naturally occurring material with a temperature colder than 0 °C (32 °F) continuously for two or more years. Such a layer of frozen ground is designated exclusively on the basis of temperature.

Permafrost is any ground that remains completely frozen—32°F (0°C) or colder—for at least two years straight. These permanently frozen grounds are most common in regions with high mountains and in Earth’s higher latitudes—near the North and South Poles.

Examples of permafrost in a Sentence Recent Examples on the Web Although an older grass seed was successfully germinated after millennia frozen in Siberian permafrost, these dates are some of the oldest plants ever successfully germinated.

Permafrost is a permanently frozen layer below the Earths surface. It consists of soil, gravel, and sand, usually bound together by ice. Permafrost usually remains at or below 0C (32F) for at least two years. Permafrost can be found on land and below the ocean floor.

Permafrost is any type of ground—from soil to sediment to rock—that has been frozen continuously for a minimum of two years and as many as hundreds of thousands of years.

Arctic permafrost is thawing fast. That affects us all. As the frozen ground warms much faster than expected, it’s reshaping the landscape—and releasing carbon gases that fuel global warming. As...

Permafrost at outposts in the Canadian Arctic is thawing 70 years earlier than predicted, an expedition has discovered, in the latest sign that the global climate crisis is accelerating even faster...