"These (weather) events would not have happened without global warming," said Kevin Trenberth, chief of climate analysis for the National Center for Atmospheric Research in Boulder, Colo.
2010's world gone wild: Quakes, floods, blizzards →
But Kevin Trenberth, climate analysis chief at the National Center for Atmospheric Research in Boulder, said the preliminary study that Hoerling conducted was flawed and too simplified.
Fire and rain: Fed scientists point to wild April →
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