the concept is that a bunker would do you no good. go underground for 100 years only to pop out to 140F temp and toxic radiation from all the meltdowns of nuclear plants. so yeah, do what you love unless living in an underground food pantry is what you love.
when the arctic goes, it is all over but the nuclear war. no plankton, no fish, no food ... big freaking drama followed by economic collapse and war.