As permafrost thaws, increased microbial activity in the soils results in the release of more carbon to the atmosphere. more carbon in the atmosphere accelerated the greenhouse effect. as temperatures increase further, more carbon can enter the atmosphere, causing temperatures to increase even more. this is an example of a(n)

Permafrost-carbon feedback

Explanation: Permafrost is the later of the earth surface that are frozen, It Thawing is a major cause of Global warming, Permafrost contain many Green House gases such as Methane and other hydrocarbons as the Permafrosts Thaw,unlocking of the carbon deposits on the earth takes placeas all this hydrocarbons released causes flooding,high temperatures and excessive decomposition of organic matters.