Antarctic Melting: Seafloor Clues and Rapid Collapse Warning.
Markings on the seafloor off Norway that record the pull-back of a melting European ice sheet thousands of years ago suggest that Antarctica's melting ice sheet could retreat much faster than previously thought. The fastest withdrawing glaciers in Antarctica are seen to retreat by up to 30m a day, but if they sped up, the extra melt water would have big implications for sea-level rises around the globe. The researchers found that with the Norwegian sheet, the maximum retreat was more than 600m a day.