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.

中文翻译：

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提前融雪的警告

北美西部山区的积雪量正在减少，并且经常使用最大年度积雪量来报告这些趋势。另一种度量标准-积雪季节的融雪量-发现融雪量下降的幅度是三倍，表明降雪量甚至更大。