September 6, 2013. At the end of August, the average area of Arctic ice was 990,000 square kilometers. It is 130,000 square miles less than the norm, but significantly greater than the absolute minimum, recorded last year.
The difference was 2.38 million square kilometers. August 2013 took sixth place from the end of the climate history dating back to 1979.
The only water area with an area of ice close to the norm, it was the East Siberian Sea, while in July it included the Beaufort Sea and Chukchi Sea. Reduction of the area of ice came with the pace of 56,000 square kilometers in 400 days. This is slightly higher than the average long-term value, but a third less than in August 2012. The process of reduction of ice is well correlated with August 2008 and 2010.
The main feature was a big hole in an area of 150 square kilometers with almost pure water near the North Pole. Similar anomalies occurred in the past, notably in 2006, but further south? in the Beaufort Sea and Chukchi Sea. As they note the U.S. National Center on snow and ice, it's all the more strange that the air temperature in the lower troposphere was slightly lower than usual for this time.