气候变化领域集成服务门户(CCPortal): Climate change alters flood magnitudes and mechanisms in climatically-diverse headwaters across the northwestern United States

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DOI	10.1088/1748-9326/ab986f
	Climate change alters flood magnitudes and mechanisms in climatically-diverse headwaters across the northwestern United States
	S Chegwidden O.; Rupp D.E.; Nijssen B.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	Flooding caused by high streamflow events poses great risk around the world and is projected to increase under climate change. This paper assesses how climate change will alter high streamflow events by changing both the prevalence of different driving mechanisms (i.e. 'flood generating processes') and the magnitude of differently generated floods. We present an analysis of simulated changes in high streamflow events in selected basins in the hydroclimatically diverse Pacific Northwestern United States, classifying the events according to their mechanism. We then compare how the different classes of events respond to changes in climate at the annual scale. In a warmer future, high flow events will be caused less frequently by snowmelt and more frequently by precipitation events. Also, precipitation-driven high flow events are more sensitive to increases in precipitation than are snowmelt-driven high flow events, so the combination of the increase in both frequency and magnitude of precipitation-driven high flow events leads to higher flood likelihood than under each change alone. Our comparison of the results from two emissions pathways shows that a reduction in global emissions will limit the increase in magnitude and prevalence of these precipitation-driven events. © 2020 The Author(s). Published by IOP Publishing Ltd.
语种	英语
scopus关键词	Floods; Snow melting systems; Stream flow; Different class; Driving mechanism; Flood magnitudes; Global emissions; High-flow events; Northwestern United States; Precipitation events; Stream-flow events; Climate change; climate change; flood frequency; headwater; magnitude; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153766
作者单位	Civil and Environmental Engineering, University of Washington, Seattle, WA 98195, United States; Oregon Climate Change Research Institute, Oregon State University, Corvallis, OR 97331, United States
推荐引用方式 GB/T 7714	S Chegwidden O.,Rupp D.E.,Nijssen B.. Climate change alters flood magnitudes and mechanisms in climatically-diverse headwaters across the northwestern United States[J],2020,15(9).
APA	S Chegwidden O.,Rupp D.E.,&Nijssen B..(2020).Climate change alters flood magnitudes and mechanisms in climatically-diverse headwaters across the northwestern United States.Environmental Research Letters,15(9).
MLA	S Chegwidden O.,et al."Climate change alters flood magnitudes and mechanisms in climatically-diverse headwaters across the northwestern United States".Environmental Research Letters 15.9(2020).