Giant chunks break off Canadian ice shelf

Giant sheets of ice totaling almost eight square miles broke off an ice shelf in the Canadian Arctic last week and more could follow later this year, scientists said on Tuesday.

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.The ice broke away from the shelf on Ward Hunt Island, an small island just off giant Ellesmere Island in one of the northernmost parts of Canada.It was the largest fracture of its kind since the nearby Ayles ice shelf -- which measured 25 square miles -- broke away in 2005.Scientists had already identified deep cracks in the Ward Hunt shelf, which measures around 155 square miles. The shelf is one of five along Ellesmere Island in the northern Arctic."Because the break-off occurred between two large parallel cracks they're thinking more could go this summer before the freeze sets in".said the scientist

"It underscores the fact that each year we're now crossing new thresholds in environmental change in the High Arctic, and of course our concern in the longer term is that these may signal the onset of serious change at all latitudes, much further to the south, for example," he told Reuters.