Arctic Sea Ice Extent, September 2008 (IMAGE) University of Colorado at Boulder Caption Arctic sea ice extent for September 2008 was 1.8 million square miles, second lowest on satellite record. University of Colorado at Boulder researchers believe it may be the lowest sea ice volume ever recorded. The light blue line in the Arctic shows the normal ice edge. Credit University of Colorado at Boulder's National Snow and Ice Data Center 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.