Yeah it gets pretty hot here in Australia, after all it's a desert. But we've never gotten to minus degrees where I live and i would suppose in Norway its the opposite (correct me if I'm wrong). I can't believe that most of the marine life has been affected due to the just a few changes in temperatures. The temperatures are continuing to stay at a constant few degrees higher than the usual, meaning that the marine life haven't been able to recover for the past few years. This leads to greater damage in coral.