Antarctic Sea Ice Extent Closing in on more Records (Still 2nd Highest) Published on August 12, 2013 by sunshinehours1 Day 223 in the Antarctic (August 12) has Antarctic Sea Ice Extent slowly closing on 2010’s record. Day 223 is 1,000,000 sq km above the 30 year mean. Share this:TwitterFacebookLike this:Like Loading... Related