Polaris
The general assumption in the post-Serpentfall world is that everyone in Greenland is dead. The population was never very large (perhaps 21,000 in early 1945, not counting American troops) and temperatures in the Arctic since the Serpentfall have dropped to the point where seventy degrees Fahrenheit below zero is not unheard of. If it gets much colder up there, the carbon dioxide in the atmosphere at the pole will start freezing, and how that will affect the global climate is anybody’s guess.