| Regional [Pacific Northwest: Oregon, Washington, Idaho, western Montana and extreme northwestern Wyoming] annual mean temperature (Fig. 1a) shows long term warming modulated by interdecadal variability with relatively cool periods 1910–25 and 1945–60 and relatively warm periods around 1940 and since the mid- 1980s [from 4 datasets: USHCN v2.5, PRISM, CRU, NCDC]. The warmest year in the region was 1934, but the warmest 10-yr period was 1998–2007, with very few years since 1980 that had below-average annual mean temperatures. Linear trends in annual mean temperature from 1901 to 2012 were between 0.056° and 0.076°C decade-1, with larger warming found in the CRU dataset. |
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