Ethan Swope / AP

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Daniel Swain for NBC News — Climate change most likely intensified rainfall, UCLA scientist says

UCLA climate scientist Daniel Swain explains how climate change is warming the atmosphere and the ocean, and both dynamics most likely contributed to a more intense atmospheric river storm’s battering Los Angeles for NBC News. “In a warming atmosphere and as oceans warm along with the atmosphere, the ceiling on how intense atmospheric rivers can become and the ceiling on how intense precipitation can become increases pretty rapidly with warming,” Swain said.