Met Office: The decline in Arctic summer sea-ice

Modelling of Arctic sea-ice by the Met Office Hadley Centre climate model shows that ice invariably recovers from extreme events, and that the long-term trend of reduction is robust — with the first ice-free summer expected to occur between 2060 and 2080. It is unlikely that the Arctic will experience ice-free summers by 2020.

Analysis of the 2007 summer sea-ice minimum has subsequently shown that this was due, in part, to unusual weather patterns. Arctic weather systems are highly variable year-on-year and the prevailing winds can enhance, or oppose, the southward flow of ice into the Atlantic. Consequently, the sea-ice has not declined every year, but has shown considerable variability — both in extent and thickness.

2008: The (Annotated) Gore Energy Speech - Dot Earth Blog - NYTimes.com

[Gore] The climate crisis, in particular, is getting a lot worse – much more quickly than predicted. Scientists with access to data from Navy submarines traversing underneath the North polar ice cap have warned that there is now a 75 percent chance that within five years the entire ice cap will completely disappear during the summer months.

BBC - Paul Hudson's Blog: The Polar ice conundrum

...on the other side of the world, something rather odd seems to be happening in Antarctica. The ice is actually increasing in extent, not decreasing.