A month ago I heard Trenberth’s insufferbable rant in Boulder, blaming Republicans for causing the warm US winter of 2012. Now he says they caused the cold US winter of 2014.
The extreme cold and snow across the eastern half of the United States this past winter makes global warming seem laughable. But, paradoxically, the blasts of polar air were fueled in part by planet-warming gases, according to a new paper.
The theory, outlined today in the journal Science, builds on research Palmer conducted in the 1980s and resonates with more recent work led by Kevin Trenberth, a climate scientist at the National Center for Atmospheric Research in Boulder, Colo.