气候变化领域集成服务门户(CCPortal): Growing impact of wildfire on western US water supply

CCPortal

DOI	10.1073/pnas.2114069119
	Growing impact of wildfire on western US water supply
	Williams, A. Park; Livneh, Ben; McKinnon, Karen A.; Hansen, Winslow D.; Mankin, Justin S.; Cook, Benjamin, I; Smerdon, Jason E.; Varuolo-Clarke, Arianna M.; Bjarke, Nels R.; Juang, Caroline S.; Lettenmaier, Dennis P.
发表日期	2022
ISSN	0027-8424
EISSN	1091-6490
卷号	119 期号:10
英文摘要	Streamflow often increases after fire, but the persistence of this effect and its importance to present and future regional water resources are unclear. This paper addresses these knowledge gaps for the western United States (WUS), where annual forest fire area increased by more than 1,100% during 1984 to 2020. Among 72 forested basins across the WUS that burned between 1984 and 2019, the multibasin mean streamflow was significantly elevated by 0.19 SDs (P < 0.01) for an average of 6 water years postfire, compared to the range of results expected from climate alone. Significance is assessed by comparing prefire and postfire streamflow responses to climate and also to streamflow among 107 control basins that experienced little to no wildfire during the study period. The streamflow response scales with fire extent: among the 29 basins where >20% of forest area burned in a year, stream-flow over the first 6 water years postfire increased by a multibasin average of 0.38 SDs, or 30%. Postfire streamflow increases were significant in all four seasons. Historical fire-climate relationships combined with climate model projections suggest that 2021 to 2050 will see repeated years when climate is more fire-conducive than in 2020, the year currently holding the modern record for WUS forest area burned. These findings center on relatively small, minimally managed basins, but our results suggest that burned areas will grow enough over the next 3 decades to enhance streamflow at regional scales. Wildfire is an emerging driver of runoff change that will increasingly alter climate impacts on water supplies and runoff-related risks.
英文关键词	wildfire; streamflow; climate change
语种	英语
WOS研究方向	Multidisciplinary Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000771755300011
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280435
作者单位	University of California System; University of California Los Angeles; Columbia University; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; University of California System; University of California Los Angeles; University of California System; University of California Los Angeles; Cary Institute of Ecosystem Studies; Dartmouth College; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; Goddard Institute for Space Studies; Columbia University
推荐引用方式 GB/T 7714	Williams, A. Park,Livneh, Ben,McKinnon, Karen A.,et al. Growing impact of wildfire on western US water supply[J],2022,119(10).
APA	Williams, A. Park.,Livneh, Ben.,McKinnon, Karen A..,Hansen, Winslow D..,Mankin, Justin S..,...&Lettenmaier, Dennis P..(2022).Growing impact of wildfire on western US water supply.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,119(10).
MLA	Williams, A. Park,et al."Growing impact of wildfire on western US water supply".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 119.10(2022).