The mystery of Lake Superior’s low levels, surging temperatures

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MARQUETTE, Mich. ? As the research boat bobs up and down on grey, choppy Lake Superior, Michigan Tech University chemist Noel Urban and two students drop a metal cylinder over the side to retrieve a water sample from the bottom.


They are measuring carbon dioxide content ? an unspectacular statistic by itself, yet an important piece of a highly complex puzzle.
globeandmail.com: The mystery of Lake Superior’s low levels, surging temperatures

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