A new NASA-led study shows carbon in Alaska's North Slope tundra ecosystems spends about 13% less time locked in frozen soil than 40 years ago. In other words, the carbon cycle there is speeding up, and is now at a pace more characteristic of a North American boreal forest than of the icy Arctic.

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A new NASA-led study shows carbon in Alaska's North Slope tundra ecosystems spends about 13% less time locked in frozen soil than 40 years ago. In other words, the carbon cycle there is speeding up, and is now at a pace more characteristic of a North American boreal forest than of the icy Arctic.