Nature: Science 323, 753 (2009) The break-up of the West Antarctic Ice Sheet could cause a disproportionate amount of sea level rise along coastlines in North America and the Indian Ocean. Typical analyses suggest that if the ice sheet melted, it would raise average global sea level by five metres — but this may understate the impacts on some regions, according to a new study. Jerry Mitrovica of the University of Toronto and colleagues used a technique called sea level fingerprinting …