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A warning of earlier snowmelt

Mountain snowpack in western North America is decreasing, and these trends are often reported using amount of maximum annual snowpack. An alternative metric — integrated snowmelt during the accumulation season — finds snowmelt decreases are three times more widespread, suggesting even stronger snow decline.

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Fig. 1: Coconino National Forest, Arizona, USA, in February 2021.


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Correspondence to Mu Xiao.

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Xiao, M. A warning of earlier snowmelt. Nat. Clim. Chang. (2021).

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