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Sunday, January 30, 2011

In case you were wondering why...
Posted by Jill | 10:36 PM
I know that other areas, like Connecticut, have it worse than we do. All we have is about 20" is snowpack on the ground, ruined shrubs, and ice dams in the gutters with icicles that would have to be registered as deadly weapons in some states. And of course there's that storm coming this week, which is going to either dump another ton of snow on us, or coat everything with ice, undoubtedly causing a power outage that will mean no heat for who knows how many days. Just something else to look forward to.

But if you're wondering why this winter is so crazy, here's why:
The warming Arctic and melting sea ice is a planetary-scale change since the Arctic Ocean covers 14 million sq km, an area almost as big as Russia. The Arctic and Antarctic polar regions are key drivers of Earth's weather and climate. The rapid defrosting of the Arctic has already altered the climate system, researchers now agree.

IPS previously broke the story revealing that the snow and cold in the eastern United States and Europe during the winter of 2009-10 was likely the result of the loss of Arctic sea ice. The same thing has happened this year.

As more and more sea ice melts, there is more open water to absorb the summer sun's heat. A day of 24-hour summer sun in the Arctic puts more heat on the surface of the ocean than a day in the tropics, James Overland of the NOAA/Pacific Marine Environmental Laboratory in the United States told IPS.

That extra heat in the ocean is gradually released into the lower atmosphere from October to January as the region slowly re-freezes months later than normal. This is a fundamental change - a large part of the Arctic Ocean is radiating heat instead of being cold and ice-covered. That has disrupted wind circulation patterns in the northern hemisphere, reported Overland and other researchers at the International Polar Year Oslo Science Conference in Norway last June.

The result: the Arctic stays warm and mid-latitude regions become colder and receive more snow for much of the winter. Last December was the coldest south Florida has experienced in more than a century of record-keeping.

Most of Britain suffered through its coldest December ever. Up in the Arctic, Coral Harbour on the northwest corner of Hudson Bay was above zero degrees C for two days in early January for the first time in history. Much of the eastern Arctic centred around Baffin Island averaged +21C above normal between Dec. 17 and Jan. 15 this year.

This looks to be the new normal since Arctic experts agree the melting sea ice is now locked into a death spiral.

"In future, cold and snowy winters will be the rule rather than the exception" in the eastern United States and Europe, Overland previously told IPS.

So tell your wingnut friends who think climate change is a hoax to stop bitching about this winter. Because there are more of them to come.

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Anonymous Anonymous said...
Haven't cold winters on the east coast of the U. S. and in England been predicted for some time? I seem to remember having read quite a while ago that they were predicting the Gulf Stream, which moderates the climate in the eastern U.S., would change course leaving the area especially cold in the winter.

I haven't heard anything recently about the Gulf Stream moving so I doubt that's the problem now. Also, Scientists are being very cautious about attributing the current Arctic warming to GW.