The permafrost is melting and that will put a lot of extra CO2 into the atmosphere.
My son Ben just sent me this link to a short film laying out some of the science:
He has the last word, at the end, based on his research that will culminate this summer in his degree so he’ll be a Ph.D. like the others who speak on the film. And then, of course, the Nobel Prize.
Here a photo of a thermokarst (caused by melting permafrost) like the ones Ben and others are studying: