PIOMAS (IMAGE) University of Washington Caption This shows monthly sea-ice anomalies from 1979 to the present calculated using the PIOMAS tool. Credit J. Zhang / Univ. of Washington Usage Restrictions With credit 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.