Wind causing most of temperature rise in north-west US

September 22, 2014 7:10 PM

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The north-western US has experienced 100 years of warming, leading to wildfires and infestations of pests like pine beetles. But the extra heat seems to be linked to natural changes in the winds of the Pacific rather than human-caused climate change.

Since 1900, the north-west US, including northern California and Oregon, has warmed by about 0.8 °C. James Johnstone of the University of Washington in Seattle wanted to see if global warning was responsible. "There does seem to be a tendency for any [century-long] trend in temperature – a warming t...

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