Declines in Peak Snow Water Equivalent and Elevated Snowmelt Rates Following the 2020 Cameron Peak Wildfire in Northern Colorado

Daniel McGrath; Lucas Zeller; Randall BonnellWyatt ReisStephanie KampfKeith WilliamsMarianne OkalAlex Olsen‐MikitowiczElla BumpMegan SearsKarl Rittger

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Declines in Peak Snow Water Equivalent and Elevated Snowmelt Rates Following the 2020 Cameron Peak Wildfire in Northern Colorado

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Abstract Wildfires are increasingly impacting high‐elevation forests in the western United States that accumulate seasonal snowpacks, presenting a major disturbance to a critical water reservoir for the region. In the first winter following the 2020 Cameron Peak wildfire in Colorado, the peak snow water equivalent in a high burn severity forest was 17–25 less than nearby unburned sites. The loss of the forest canopy and a lower surface albedo led to an increasingly positive net shortwave radiation balance in the burned area, resulting in melt rates that were 82–144 greater than unburned sites and snow disappearance occurred 11–13 days earlier. Late‐season snow storms temporarily buried soot, thus increasing the albedo and delaying melt‐out by an estimated 4 days per storm in our study area. While these storms temporarily reduce the higher melt rates imposed by wildfire impacts, SNOTEL measurements show that they occur non‐uniformly across the western U.S.

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来源
《Geophysical Research Letters》 |2023年第6期|n/a-n/a|共10页
作者
Daniel McGrath; Lucas Zeller; Randall BonnellWyatt ReisStephanie KampfKeith WilliamsMarianne OkalAlex Olsen‐MikitowiczElla BumpMegan SearsKarl Rittger;
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作者单位

Colorado State University;

UNAVCO, Inc.;

Institute for Arctic and Antarctic Research;

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原文格式 PDF
正文语种英语
中图分类地球物理学;
关键词
seasonal snow; wildfire; snow water equivalent; melt rate; albedo; energy balance;

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Declines in Peak Snow Water Equivalent and Elevated Snowmelt Rates Following the 2020 Cameron Peak Wildfire in Northern Colorado

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