The Greenland ice sheet is melting at a record rate due to global warming, according to a British-led expedition currently taking measurements from the treacherous glaciers. Two satellite images provided by NASA and taken on July 28 and Aug. 5, show the Petermann Glacier in Northern Greenland. A giant ice island, seen in image at right, has broken off the Petermann Glacier. The floating ice sheet covers 100 square miles (260 sq. kilometres) - more than four times the size of Manhattan. AFP / NASA

By Louise Gray, Environment Correspondent
Published: 7:00AM BST 13 Aug 2010 The University of St Andrews team said 106 square miles broke away from the Petermann Glacier at the beginning of August. The massive ice island is is the largest single area loss observed for Greenland and suggests the effect of rising temperatures is affecting the Arctic faster than anticipated. The finding immediately raises fears about the long term effect on rising sea levels and ultimately ‘positive feedbacks’ as water absorbs more heat than ice, therefore speeding up the warming effect. Dr Richard Bates, who is monitoring the ice alongside researchers from America, said the expedition had expected to find evidence of melting this year after “abnormally high” temperatures in the area. Climate change experts say that globally it has been the warmest six months globally since records began. But he was “amazed to see an area of ice three times the size of Manhattan Island had broken off. “It is not a freak event and is certainly a manifestation of warming. This year marks yet another record breaking melt year in Greenland; temperatures and melt across the entire ice sheet have exceeded those in 2007 and of historical records.” …

Ice sheet in Greenland melting at record rate