Which of the following has been cited as a positive feedback loop involving the thawing of permafrost?
A)Thawing of permafrost will increase albedo,leading to more warming.
B)Thawing of permafrost will release vast amounts of carbon to the atmosphere,accelerating warming.
C)Thawing of permafrost will inhibit frost wedging action on large boulders,altering absorption ability.
D)Thawing of permafrost will contribute to sea level rise,which will further reduce overall global albedo values.

Question

Quizplus · Accepted Answer

Thawing of permafrost releases stored carbon, which increases the amount of greenhouse gases in the atmosphere, leading to further warming and more thawing of permafrost. This is a positive feedback loop. The other choices do not involve a positive feedback loop with permafrost thawing.

Which of the Following Has Been Cited as a Positive