[Xringer]

Originally Posted by Solar

read this:
http://www.nytimes.com/2011/01/25/sc...pagewanted=all


Since satellites began tracking it in 1979, the ice on the Arctic Ocean’s
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We're reaching and beyond the point of no return

And a little bit down the page, it says:

Their theories involve a fast-moving river of air called the jet stream that circles the Northern Hemisphere. Many winters, a strong pressure difference between the polar region and the middle latitudes channels the jet stream into a tight circle, or vortex, around the North Pole, effectively containing the frigid air at the top of the world.

“It’s like a fence,” said Michelle L’Heureux, a researcher in Camp Springs, Md., with the National Oceanic and Atmospheric Administration.

When that pressure difference diminishes, however, the jet stream weakens and meanders southward, bringing warm air into the Arctic and cold air into the midlatitudes — exactly what has happened the last couple of winters.


The jet stream moves around. There is nothing to make it always stay on the same path.
When it starts meandering, it's going to impact the weather..