The iceberg that broke off Greenland's Petermann Glacier on July 16 is twice the size of Manhattan, according to researchers at the University of Delaware and the Canadian Ice Service. This event was the second big split in two years. More than a third of the glacier has now broken off.
Andreas Muenchow, associate professor of physical ocean science and engineering at the University of Delaware, described on his blog the state of knowledge about the ice dynamics at work in glacial breaks, also known as calving. "We have barely started to understand all these interacting processes, but it is an exciting time of change," he wrote the day after the calving. "Some changes are dramatically visible such as the discharge of large ice islands, some changes, perhaps more important, are not."
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