Campaigner Melanie Duchin from Alaska holds a sign reading "North Pole 445m" outside the Greenpeace ship MY Arctic Sunrise after it reached 'the ice bridge' in the Robeson channel, at 82.4 North, near the border between Greenland and Canada. This is the Southernmost extent of the summer sea ice which usually extends much further south into the Nares Strait, it has receded dramatically in recent years. Greenpeace and leading climate scientists are in Greenland for a 3 month expedition to gather climate change data.