气候变化领域集成服务门户(CCPortal): Warming enabled upslope advance in western US forest fires

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DOI	10.1073/pnas.2009717118
	Warming enabled upslope advance in western US forest fires
	Alizadeh M.R.; Abatzoglou J.T.; Luce C.H.; Adamowski J.F.; Farid A.; Sadegh M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:22
英文摘要	Increases in burned area and large fire occurrence are widely documented over the western United States over the past half century. Here, we focus on the elevational distribution of forest fires in mountainous ecoregions of the western United States and show the largest increase rates in burned area above 2,500 m during 1984 to 2017. Furthermore, we show that high-elevation fires advanced upslope with a median cumulative change of 252 m (-107 to 656 m; 95% CI) in 34 y across studied ecoregions. We also document a strong interannual relationship between high-elevation fires and warm season vapor pressure deficit (VPD). The upslope advance of fires is consistent with observed warming reflected by a median upslope drift of VPD isolines of 295 m (59 to 704 m; 95% CI) during 1984 to 2017. These findings allow us to estimate that recent climate trends reduced the high-elevation flammability barrier and enabled fires in an additional 11% of western forests. Limited influences of fire management practices and longer fire-return intervals in these montane mesic systems suggest these changes are largely a byproduct of climate warming. Further weakening in the high-elevation flammability barrier with continued warming has the potential to transform montane fire regimes with numerous implications for ecosystems and watersheds. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Climate change; Climate velocity; Fire elevation; Montane forests; Wildfire
语种	英语
scopus关键词	article; biogeographic region; climate warming; controlled study; flammability; forest fire; season; United States; vapor pressure; watershed
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/238727
作者单位	Department of Bioresource Engineering, McGill University, Montréal, QC H3A 0G4, Canada; Management of Complex Systems Department, University of California, Merced, CA 95343, United States; United States Forest Service Aquatic Science Laboratory, Rocky Mountain Research Station, Boise, ID 83702, United States; Department of Civil Engineering, Boise State University, Boise, ID 83725, United States
推荐引用方式 GB/T 7714	Alizadeh M.R.,Abatzoglou J.T.,Luce C.H.,et al. Warming enabled upslope advance in western US forest fires[J],2021,118(22).
APA	Alizadeh M.R.,Abatzoglou J.T.,Luce C.H.,Adamowski J.F.,Farid A.,&Sadegh M..(2021).Warming enabled upslope advance in western US forest fires.Proceedings of the National Academy of Sciences of the United States of America,118(22).
MLA	Alizadeh M.R.,et al."Warming enabled upslope advance in western US forest fires".Proceedings of the National Academy of Sciences of the United States of America 118.22(2021).