This NASA animation shows the rapid decline in the Arctic's perennial sea ice from 1984-2016.
원문출처 : http://www.cnn.com/videos/tv/2016/11/02/arctic-ice-animation-orig-bu.cnn
원문출처 : http://www.cnn.com/videos/tv/2016/11/02/arctic-ice-animation-orig-bu.cnn