Ross Ice Shelf melting faster than expected

A corner of the giant Ross Ice Shelf is melting ten times faster than the rest of the shelf. The National Institute of Water and Atmospheric Research discovered it was happening as part of collaborative research which has just been published in the prestigious journal, Nature Geoscience. NIWA's principal marine physicist Mike Williams and others, studied the north-western corner of the ice shelf for several years to record how it was melting, and what was causing the melt. Mike Williams talks to Gyles Beckford.