4.6 Article

Forest Fires Reduce Snow-Water Storage and Advance the Timing of Snowmelt across the Western US

期刊

WATER
卷 13, 期 24, 页码 -

出版社

MDPI
DOI: 10.3390/w13243533

关键词

snow; forest fire; snow-water storage; snowmelt; snow water equivalent; snow disappearance date; snowmelt rate

资金

  1. McNair Scholars Program
  2. Louis Stokes Alliance for Minority Participation Fund at Portland State University

向作者/读者索取更多资源

As climate warms, snow-water storage decreases and forest fires increase, leading to reduced water availability. In some regions, burned forests accelerate snowmelt, affecting water resources across the area.
As climate warms, snow-water storage is decreasing while forest fires are increasing in extent, frequency, and duration. The majority of forest fires occur in the seasonal snow zone across the western US. Yet, we do not understand the broad-scale variability of forest fire effects on snow-water storage and water resource availability. Using pre- and post-fire data from 78 burned SNOTEL stations, we evaluated post-fire shifts in snow accumulation (snow-water storage) and snowmelt across the West and Alaska. For a decade following fire, maximum snow-water storage decreased by over 30 mm, and the snow disappearance date advanced by 9 days, and in high severity burned forests snowmelt rate increased by 3 mm/day. Regionally, forest fires reduced snow-water storage in Alaska, Arizona, and the Pacific Northwest and advanced the snow disappearance date across the Rockies, Western Interior, Wasatch, and Uinta mountains. Broad-scale empirical results of forest fire effects on snow-water storage and snowmelt inform natural resource management and modeling of future snow-water resource availability in burned watersheds.

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