Actually when I visited the new Cliffs of Moher Visitor's Center a couple of years ago there was an interesting storyboard. It showed how global warming would actually make Ireland and northern Europe colder. According to the illustrations the melting ice in the north will head south and guess what little island is right in the way of a cold bath? I guess by the time it reaches the US it will be a lot warmer.
Whether it's true or just conjecture, is open to interpretation.