气候变化领域集成服务门户(CCPortal): Heterogeneity in post-fire thermal responses across Pacific Northwest streams: A multi-site study

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DOI	10.1016/j.hydroa.2024.100173
	Heterogeneity in post-fire thermal responses across Pacific Northwest streams: A multi-site study
	Beyene, Mussie T.; Leibowitz, Scott G.
发表日期	2024
EISSN	2589-9155
起始页码	23
卷号	23
英文摘要	Over the past century, water temperatures in many streams across the Pacific Northwest (PNW) have steadily risen, shrinking endangered salmonid habitats. The warming of PNW stream reaches can be further accelerated by wildfires burning forest stands that provide shade to streams. However, previous research on the effect of wildfires on stream water temperatures has focused on individual streams or burn events, limiting our understanding of the diversity in post-fire thermal responses across PNW streams. To bridge this knowledge gap, we assessed the impact of wildfires on daily summer water temperatures across 31 PNW stream sites, where 10-100% of their riparian area burned. To ensure robustness of our results, we employed multiple approaches to characterize and quantify fire effects on post-fire stream water temperature changes. Averaged across the 31 burned sites, wildfires corresponded to a 0.3 - 1(degrees)C increase in daily summer water temperatures over the subsequent three years. Nonetheless, post-fire summer thermal responses displayed extensive heterogeneity across burned sites where the likelihood and rate of a post-fire summer water temperature warming was higher for stream sites with greater proportion of their riparian area burned under high severity. Also, watershed features such as basin area, post-fire weather, bedrock permeability, pre-fire riparian forest cover, and winter snowpack depth were identified as strong predictors of the post-fire summer water temperature responses across burned sites. Our study offers a multi-site perspective on the effect of wildfires on summer stream temperatures in the PNW, providing insights that can inform freshwater management efforts beyond individual streams and basins.
英文关键词	Wildfires; Stream water temperatures; Spatial variability; Pacific Northwest; Environmental drivers
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001188832900001
来源期刊	JOURNAL OF HYDROLOGY X
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301018
作者单位	United States Environmental Protection Agency; United States Environmental Protection Agency
推荐引用方式 GB/T 7714	Beyene, Mussie T.,Leibowitz, Scott G.. Heterogeneity in post-fire thermal responses across Pacific Northwest streams: A multi-site study[J],2024,23.
APA	Beyene, Mussie T.,&Leibowitz, Scott G..(2024).Heterogeneity in post-fire thermal responses across Pacific Northwest streams: A multi-site study.JOURNAL OF HYDROLOGY X,23.
MLA	Beyene, Mussie T.,et al."Heterogeneity in post-fire thermal responses across Pacific Northwest streams: A multi-site study".JOURNAL OF HYDROLOGY X 23(2024).