Comparison of Sea Ice Concentrations (image) Hokkaido University Share Print E-Mail Caption Sea ice concentrations in September. The left and right maps show the average ice concentration in the Arctic Ocean in the 1980s and 2010s respectively. The fan-shaped outline marks the study area. Credit The maps are based on information provided by the National Snow and Ice Data Center. Usage Restrictions This image is copyrighted and can be used for reporting this press release if properly credited. Share Print E-Mail 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.