permafrost, definition of

A layer of permanently frozen soil underground. An important feature of a tundra.

• Whatever happened to the Siberian permafrost “tipping point” from 2005?
  It seems like yet another climate doomsday prediction has failed to materialize. The goalposts have been moved into the future, again.
• Study finds sinking tundra surface unlikely to trigger runaway permafrost thaw
  “Improved drainage results in a drier landscape over a decadal timescale, and the process then becomes self-limiting,” said Scott Painter, who leads the Watershed Systems Modeling group at ORNL.
• A "zombie virus" is being studied from Siberian permafrost
  European Researchers warned that climate change could reanimate frozen "zombie viruses" and expose humans to lethal diseases. In November 2022, researchers from France, Germany and Russia announced that they had reanimated one such virus. The virus they...
• Fast melting alpine permafrost is bad news for Earth
  Melting permafrost will play a major role in shaping Earth's future. Recent research published in Nature Communications has established that alpine permafrost will melt much faster than arctic permafrost under current conditions. This melt would release...
• Claim: Permafrost peatlands approaching tipping point
  Researchers warn that permafrost peatlands in Europe and Western Siberia are much closer to a climatic tipping point than previous believed. 
• Thawing Permafrost Could Leach Microbes, Chemicals Into Environment
  The hope is that using measurements from a combination of platforms will help scientists create a fuller picture of changes at the poles, where permafrost is thawing the fastest.
• Monitoring Arctic Permafrost with Satellites, Supercomputers, and Deep Learning
  "The ice wedges form from the freezing and melting of soil in the tundra," said Liljedahl. "Some of them are tens of thousands of years old."
• Claim: Permafrost carbon feedbacks threaten global climate goals
  From the PNAS Abstract Rapid Arctic warming has intensified northern wildfires and is thawing carbon-rich permafrost. Carbon emissions from permafrost thaw and Arctic wildfires, which are not fully accounted for…
• Claim: A groggy climate giant: subsea permafrost is still waking up after 12,000 years
  In the far north, the swelling Arctic Ocean inundated vast swaths of coastal tundra and steppe ecosystems. Though the ocean water was only a few degrees above freezing, it started to thaw the permafrost beneath it, exposing billions of tons of organic...
• We still Have a Chance? Norwegian Climate Doomsday Authors Issue a “Clarification”
  A few days ago WUWT reported on a Norwegian "past the point of no return" global warming paper whose outlook was so pessimistic even climate alarmists were upset...