Canada's 4,000-year-old Milne Ice Shelf had been the country's last intact ice shelf until the end of July.
The heating of the planet is pushing Earth’s polar bear population to its limit, and according to a new study they could have fewer than 100 years left before extinction.
“Without a doubt, it’s climate change,” Copland said, noting the ice shelf is melting from both hotter air above and warmer water below.Ice shelves are hundreds to thousands of years old, thicker than long-term sea ice, but not as big and old as glaciers, Copland said. Canada used to have a large continuous ice shelf across the northern coast of Ellesmere Island in the Canadian territory of Nunavut, but it has been breaking apart over the last decades because of man-made global warming, according to White. By 2005 it was down to six remaining ice shelves, she said, but “the Milne was really the last complete ice shelf.”
“There aren’t very many ice shelves around the Arctic anymore,” Copland said. “It seems we’ve lost pretty much all of them from northern Greenland and the Russian Arctic. There may be a few in a few protected fjords.”
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