Sea Ice (IMAGE) University of Copenhagen - Niels Bohr Institute Caption Arctic sea ice is changing, with less of the "old and thick" sea ice, which survives through the summer, to "new and thin" sea ice which melts in the spring and summer. Credit Credit: Andrea Spolaor, University of Venice Usage Restrictions Credit: Andrea Spolaor, University of Venice 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.