Arctic Ice Extent Anomaly 2012 compared to 2013 and 2011 Published on August 15, 2013August 15, 2013 by sunshinehours1 If you graph the Arctic Sea Ice Extent anomaly % from the 30 year mean, 2013 has stabilized at -15%, above the -30% of 2011 and well above the -45% of 2012. 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