The last fully intact ice shelf in the Canadian Arctic has collapsed, losing more than 40% of its area in just 2 days at the end of July, researchers say.
The Arctic has been warming at twice the global rate for the last 30 years, due to a process known as Arctic amplification. But this year, temperatures in the polar region have been intense. The polar sea ice hit its lowest extent for July in 40 years. Record heat and wildfires have scorched Siberian Russia.Summer in the Canadian Arctic this year in particular has been 5 degrees Celsius above the 30-year average, Copland said.
“The very small ones, we’re losing them dramatically,” he said, citing researchers’ reviews of satellite imagery. “You feel like you’re on a sinking island chasing these features, and these are large features. It’s not as if it’s a little tiny patch of ice you find in your garden.” A research camp, including instruments for measuring water flow through the ice shelf, was lost when the shelf collapsed. “It is lucky we were not on the ice shelf when this happened,” said researcher Derek Mueller of Carleton University in Ottawa, in an Aug. 2 blog post.“We saw them going, like someone with terminal cancer. It was only a matter of time,” said Mark Serreze, director of the National Snow and Ice Data Center in Boulder, Colorado.
The vanishing was confirmed last month, when NASA satellite shots of the region revealed a complete lack of snow and ice, said Serreze, who studied the caps as a graduate student on his first trip to the Arctic years ago. At the time, he said, the caps had seemed like immovable parts of the geography.
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