Four years ago, when Al Gore said some climate models suggested that the North Polar Ice Sheet could be completely ice-free in summer months within five years: In 2007, the BBC predicted Arctic summers ice-free by 2013. So here we are in 2013. How are things going up there? A chilly Arctic summer has left nearly a million more square miles of ocean covered with ice than at the same time last year – an increase of 60 per cent.
