Arctic river (IMAGE) University of Alaska Fairbanks Caption Water from Canada's Mackenzie River enters the blue Arctic Ocean in July 2012. White areas in the top half of the photo are largely sea ice, while those below are clouds over land. Credit Photo by NASA Earth Observatory Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.