Ramez hits the nail on the head:

“We usuallyhear about Arctic sea ice in terms of theareait covers. Every winter almost the whole Arctic freezes over. That’s changed very little. But in summers less and less is left. But what’s even scarier is that the ice is alsothinnerby about half. When we look at it in terms of volume, in the height of summer, three quarters of the ice volume from the 1980s is gone. Three quarters. There’s ice still covering water, but it’s thin, and fragile.”

(Via Arctic S...