Arctic Avg Sea Ice Loss/Decade - 1.8 Million Km2; Antarctic Avg Sea Ice Gain/Decade - 285K Km2
EDIT
The Tasmania-based Antarctic Climate and Ecosystems Cooperative Research Centre has just released a new "position analysis" of the brain-achingly complex issue of southern hemisphere sea ice. It's got a lot of science in it.
Antarctica's sea ice goes through dramatic swings from year to year. Between September and October, the amount of sea ice can reach as much as 19 million square kilometres – an area one and half times the size of the continent. By the end of the summer melt season, there's only about three million square kilometres left. The annual change, the ACE CRC reports, is "one of the biggest natural changes" observed anywhere on Earth.
The ACE CRC's report says that since 1979, the amount of sea ice coverage around Antarctica has been rising by about 285,0000 square kilometres every decade. By contrast, the Arctic has been losing 1.8 million square kilometres per decade.
But Antarctica appears to be a much more complex beast than the Arctic, where sea ice is on a downward trend pretty much everywhere as the region warms at roughly twice the global average. For example, the ACE CRC report says that in one area of Antarctica – the Bellingshausen Sea – the rate of sea ice loss is actually greater than the fastest melting regions of the Arctic.
EDIT
http://www.theguardian.com/environment/planet-oz/2014/mar/11/climate-change-antarctic-sea-ice-expedition