Permafrost plays a beneficial and sometimes mysterious role in Flight of the Goose, (until the end of the story when it plays a tragic role). It has played a huge supporting role in all far northern cultures for centuries - and now it threatens the entire world and its life forms!
With its sidekick methane clathrates, it may become a super villain...or in league with Kali the Destroyer.
By the way, it was reported yesterday that climate scientists and others censor themselves from reporting just how bad they think it is going to get. So climate projections you read in the news is a deliberately cheerier view than they discuss to their pet rocks.