Antarctic sea ice concentrations (IMAGE) Proceedings of the National Academy of Sciences Caption Antarctic sea ice concentrations in September 2018, at the annual maximum monthly ice extent (left), and December 2018, well into the decay season (right). Credit Image courtesy of Claire L. Parkinson and Nick DiGirolamo (NASA Goddard Space Flight Center, Greenbelt, MD). 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.