Antarctic Sea Ice 2020 winter maximum (IMAGE) Ohio University Caption Antarctic sea ice concentration on September 28, 2020, the day that the ice reached its maximum winter extent. Compared to median conditions from 1981-2010 (yellow line), the most recent maximum was slightly below average. Map by NOAA Climate.gov, based on satellite data provided by National Snow and Ice Data Center. Credit NOAA Climate.gov. Data: NSIDC Usage Restrictions No restrictions. License Public Domain 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.