". . . the area gets colder again and the ice cap rebuilds."

That's an essentially localized effect which would not take effect if the worldwide temperature continues to rise as a result of greenhouse gasses in the atmosphere.

There's an old say about "not able to see the forest for the trees." You have to look at the overall picture, Old Guy. Global warming means global warming, and although it may have temporary localized effects that seem to indicated that it isn't taking effect in the short term, that doesn't meant that it isn't happening.

By the time it makes itself patently, obviously undeniable to people like you, it will be far too late. You, and everybody else, will soon be boiling in their own juices.

Don Firth