COPENHAGEN, Denmark (AP) — A big chunk of Greenland’s ice cap, estimated to be some 42.3 square miles, has broken off in the far north east Arctic which scientists say is evidence of rapid climate change.

The glacier section broke off the fjord called Nioghalvfjerdsfjorden, which is roughly 50 miles long and 12 miles wide, the National Geological Survey of Denmark and Greenland said Monday. The glacier is at the end of the Northeast Greenland Ice Stream, where it flows off land and into the ocean.

Annual end-of-melt-season changes for the Arctic’s largest ice shelf in Northeast Greenland are measured by optical satellite imagery, the survey known as GEUS said. It shows that the area losses for the past two years each exceeded 19 square miles. The ice shelf has lost 62 square miles, an area nearly twice that of Manhattan Island, New York, since 1999.

“We should be very concerned about what appears to be progressive disintegration at the Arctic’s largest remaining ice shelf,” said GEUS professor Jason Box.

“Another massive chunk of vital sea ice has fallen into the ocean,” said Greenpeace spokeswoman Laura Meller

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