Arctic ice 'melting from below'
Arctic ice 'melting from below'
Scientists believe they have identified a mechanism which can explain the thinning of the Arctic sea ice.
They say the thinning, which in summer reaches more than 40% in some areas, has two causes.
Rising air temperatures, possibly the consequence of global warming, are melting the ice from above. And warmer water is also rising from the depths to attack the ice from below.