The Master of the Key mentioned that the collapse of an ice dam in the Laurentian sea and subsequent cooling due to winds blowing from the arctic led to the last superstorm. Meteorologists says that there's a link between the unusually cold winter in the UK and the "superstorm" in New York this year and melting sea ice in the Arctic, and warn that--no matter how much we'd like to deny it--this type of weather may become normal in the future. UPDATE: The jet stream is predicted to loop above Greenland once again this Wednesday, making more heavy weather likely for eastern North America and Europe next week.
In the December 24th edition of the Independent, Steve Connor writes: "Their models found that, as the ice cap over the ocean disappeared, this allowed the heat of the relatively warm seawater to escape into the much colder atmosphere above, creating an area of high pressure surrounded by clockwise-moving winds that sweep down from the polar region over Europe and the British Isles," and quotes researcher Vladimir Petoukhov as saying, "Whoever thinks that the shrinking of some far away sea-ice won't bother him could be wrong. There are complex interconnections in the climate system."
But the problem will only be excessive cold for a short time--soon extreme heat will be the problem. Connor quotes researcher Stefan Rahmstorf as saying, "If you look ahead 40 or 50 years, these cold winters will be getting warmer because, even though you are getting an inflow of cold polar air, that air mass is getting warmer because of the greenhouse effect, so it's a transient phenomenon. In the long run, global warming wins out."