Antarctic Sea Ice Extent Update – 870,000 sq km Above Average Published on May 14, 2013 by sunshinehours1 Antarctic Sea Ice Extent is 870,000 sq km above the 1981-2010 average. And only 43,000 sq km below the record for this day of the year. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Related