Cracked Ice (IMAGE) University of Waterloo Caption Researcher Claude Duguay stands on the cracked ice of an Arctic lake. Arctic lakes have been freezing up later in the year and thawing earlier, creating a winter ice season about 24 days shorter than it was in 1950, a University of Waterloo study has found. Credit Claude Duguay, University of Waterloo 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.