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Jane Wilson Baldwin, a postdoctoral researcher at the Lamont-Doherty Earth Observatory at Columbia University, said that given the severe drought in the West right now, many feedbacks between the land and the atmosphere are combining to produce an unusually persistent extreme.
“When the land surface is drier, it can’t cool itself through evaporation which makes the surface even hotter, which strengthens the blocking high further,” she said in an interview.
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