Trying To Unravel The Mysteries of Arctic Warming

"The Arctic is heating up faster than anyplace on Earth. And as it heats, the ice is growing thinner and melting faster. Scientists say that sometime this century, the Arctic Ocean could be free of ice during the summers. And that transition is likely to be chaotic."

"Arctic sea ice has always seen dramatic swings. Every winter, the ocean is completely covered with ice. It starts to melt in the late spring, and by September about half that ice has melted away."