Antarctic Melting Fastest in 1K Years Summers see 10 times the melting of 600 years ago By Matt Cantor, Newser User Posted Apr 15, 2013 11:22 AM CDT 56 comments Comments Tourists paddle their kayak along the Antarctic Peninsula. (AP Photo/Aurora Expeditions, Andrew Halsall) (Newser) – The Antarctic Peninsula is melting at a rate not seen for a millennium, researchers find. They investigated a 1,200-foot ice core from the peninsula, analyzing sections that had melted and refrozen, al Jazeera reports. The thickness of those layers and the gases held within revealed the extent of the melting. During the summer, 10 times as much ice melts today as it did 600 years ago, the experts say. Some 9,700 square miles of ice from 10 ice shelves have melted, and the region's temperature has increased by some five degrees, five times the world average, in the last 50 years.