The ice shelves in Canada's High Arctic have lost a colossal area this year, scientists report.
The floating tongues of ice attached to Ellesmere Island have seen almost a quarter of their cover break away.
Researchers say reduced sea-ice conditions and warm air temperatures have assisted the break-up.
"These substantial calving events underscore the rapidity of changes taking place in the Arctic," said Trent University's Dr Derek Mueller.
A rapid ice retreat is being experienced across the Arctic again this year, affecting both the ice attached to the coast and floating in the open ocean.