Heat diffusion and permafrost melting takes time — in fact, the deeper Arctic permafrost can be seen as a relic of the last glaciation, which is still slowly eroding — so any significant loss of permafrost soil carbon will
happen over long time scales.
The red areas are places to be flooded with 1 meter sea level rise (all but certain by 2100); the yellow areas are with 6 meters of sea level rise (which would
happen over a longer time scale for sure, but is still worth considering as something which we are collectively setting in motion).
Not exact matches
The closest mechanism is probably continental drift, but that
happens over far
longer time scales.