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No ice at the North Pole
by Paul Conneally | June 29, 2008 at 12:07 pm
228 views | 0 Recommendations | 1 comment
This news is further evidence for those who think climate warming is a myth that they are wrong.
It seems unthinkable, but for the first time in human history, ice is on course to disappear entirely from the North Pole this year.
The disappearance of the Arctic sea ice, making it possible to reach the Pole sailing in a boat through open water, would be one of the most dramatic – and worrying – examples of the impact of global warming on the planet. Scientists say the ice at 90 degrees north may well have melted away by the summer.
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at 18:10 on June 29th, 2008
That's at the Pole itself, due to winds that now push the ice away form the Pole, due to a shift in the Arctic Oscillation (and the smaller area of ice is less grounded on surroundinng land so its more able to move). The Arctic Ocean isn't expected to be largely ice-free until 2012 at the earliest, unfortunately a dramatic revision from earlier estimates.
The overall mass of the Arctic pack ice is a better measure of its overall health, and it continues its record decline:
http://www.commondreams.org/archive/2008/04/24/8507/
The volumes of the Greenland Ice Sheet and ice in the Arctic Ocean were estimated at 2.9 million and 4.4 million cubic metres respectively in September 2007 -- the lowest ever levels recorded, the organization said Wednesday.
The sea ice shrank to 39 percent below its 1979-2000 mean volume, it said.
"Recently observed changes are happening at rates significantly faster than predicted" by the 2005 Arctic Climate Impact Assessment (ACIA) and last year's report by the Intergovernmental Panel on Climate Change (IPCC), WWF said.
The melting of arctic sea ice and the Greenland Ice Sheet was happening so fast that experts were now questioning whether the situation is close to "tipping point," where sudden and possibly irreversible change takes place.
The accelerating rate of melt is also an issue:
"Ground-based surface temperature data shows that the rate of warming in the Arctic from 1981 to 2001 is eight times larger than the rate of Arctic warming over the last 100 years. There have also been some remarkable seasonal changes. Arctic spring, summer, and autumn have each warmed, lengthening the seasons when sea ice melts from 10 to 17 days per decade."
http://www.nasa.gov/centers/goddard/earthandsun/arctic_changes.html