Tuesday, September 2, 2008

Global Climate: irreversible, fundamental change going into high gear

NVDL: More and more of these events are occurring now,and escalating rapidly.

"These substantial calving events underscore the rapidity of changes taking place in the Arctic," said Derek Mueller, an Arctic ice shelf specialist at Trent University in Ontario.

"These changes are irreversible under the present climate and indicate that the environmental conditions that have kept these ice shelves in balance for thousands of years are no longer present," he said in an e-mailed statement from the research team sent late on Tuesday. - Yahoo.com
clipped from news.yahoo.com
The northern section of Ellesmere island is seen in a 2003 photo from NASA. (Handout/Reuters)

OTTAWA (Reuters) -
A huge 19 square mile (55 square km) ice
shelf in Canada's northern Arctic broke away last month and the
remaining shelves have shrunk at a "massive and disturbing"
rate, the latest sign of accelerating climate change in the
remote region, scientists said on Tuesday.

They said the Markham Ice Shelf, one of just five remaining
ice shelves in the Canadian Arctic, split away from Ellesmere
in early August. They also said two large chunks
totaling 47 square miles had broken off the nearby Serson Ice
Shelf, reducing it in size by 60 percent.

"The changes ... were massive and disturbing," said Warwick
Vincent, director of the Centre for Northern Studies at Laval
University in Quebec.

Temperatures in large parts of the Arctic have risen far
faster than the global average in recent decades, a development
that experts say is linked to global warming.

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