permafrost
- n ground that is permanently frozen
- Melting permafrost will release vast amounts of trapped carbon into the air LESS ICE MEANS MORE HEAT WHICH MEANS LESS ICE SPEEDING UP Ice reflects nearly all the sun's energy that .
- A similar feedback loop is melting permafrost, usually defined as land that has been continuously frozen for two years or more.
- As Alaska's climate warms, the permafrost beneath the beaches is thawing and the sea ice is thinning, leaving its 600 residents increasingly vulnerable to violent storms.