Pacific Northwest Warming May Have Natural Roots

September 23, 2014 8:33 PM

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Natural variation may explain a little more than a century of warming in this region

Dan Nichols was hauling in a gillnet laden with the fruits of a late-season Alaskan salmon run when something heavy flopped out of it, then slid to the front of his boat. “I knew what the tail was,” he says. Surprised, the mustachioed fishing veteran stopped picking salmon from his net and approache...

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