What is the role of permafrost in climate change?

There is a lot of permafrost in the Arctic. This is partially frozen ground, which is immensely important since it stores over 1.4 trillion tonnes of highly organic carbon. Today’s best estimate is that permafrost contains twice the carbon content of today’s atmosphere (Arctic report card, 2019). This means that permafrost thaw emissions could use up 25-40% of the remaining