Arctic ice 'grew by a third' after

Arctic ice 'grew by a third' after cool summer in 2013
The volume of Arctic sea ice increased by around a third after an unusually cool summer in 2013.
Researchers say the growth continued in 2014 and more than compensated for losses recorded in the three previous years.
The scientists involved believe changes in summer temperatures have greater impacts on ice than thought.
But they say 2013 was a one-off and that climate change will continue to shrink the ice in the decades ahead.