气候变化领域集成服务门户(CCPortal): Temperature and fuel availability control fire size/severity in the boreal forest of central Northwest Territories; Canada

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DOI	10.1016/j.quascirev.2020.106697
	Temperature and fuel availability control fire size/severity in the boreal forest of central Northwest Territories; Canada
	Gaboriau D.M.; Remy C.C.; Girardin M.P.; Asselin H.; Hély C.; Bergeron Y.; Ali A.A.
发表日期	2020
ISSN	0277-3791
卷号	250
英文摘要	The north-central Canadian boreal forest experienced increased occurrence of large and severe wildfires caused by unusually warm temperatures and drought events during the last decade. It is, however, difficult to assess the exceptional nature of this recent wildfire activity, as few long-term records are available in the area. We analyzed macroscopic sedimentary charcoal from four lakes and pollen grains from one of those lakes to reconstruct long-term fire regimes and vegetation histories in the boreal forest of central Northwest Territories. We used regional estimates of past temperature and hydrological changes to identify the climatic drivers of fire activity over the past 10,000 years. Fires were larger and more severe during warm periods (before ca. 5000 cal yrs. BP and during the last 500 years) and when the forest landscape was characterized by high fuel abundance, especially fire-prone spruce. In contrast, colder conditions combined with landscape opening (i.e., lower fuel abundance) during the Neoglacial (after ca. 5000 cal yrs. BP) were related with a decline in fire size and severity. Fire size and severity increased during the last five centuries, but remained within the Holocene range of variability. According to climatic projections, fire size and severity will likely continue to increase in central Northwest Territories in response to warmer conditions, but precipitation variability, combined with increased abundance of deciduous species or opening of the landscape, could limit fire risk in the future. © 2020
英文关键词	Charcoal; Climate change; Fire size; Holocene; Lake sediments; Large wildfires; Pollen; Vegetation dynamics
语种	英语
scopus关键词	Charcoal; Forestry; Fuels; Lakes; Precipitation (meteorology); Canadian boreal forest; Deciduous species; Hydrological changes; Long term records; Precipitation variability; Vegetation history; Warm temperatures; Warmer conditions; Fires; boreal forest; charcoal; climate variation; drought stress; Holocene; paleoclimate; paleoenvironment; palynology; proxy climate record; reconstruction; sediment analysis; temperature tolerance; wildfire; Canada; Northwest Territories
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151222
作者单位	School of Indigenous Studies, Université du Québec en Abitibi-Témiscamingue, 445 Boulevard de l'Université, Rouyn-Noranda, QC J9X 5E4, Canada; Institut des Sciences de l'Evolution, UMR 5554 CNRS-IRD-Université Montpellier-EPHE, 2 place Eugène Bataillon, Montpellier, 34095, France; Department of Biology, University of New Mexico, Albuquerque, United States; Centre for Forest Research, Université du Québec à Montréal, P.O. Box 8888, Stn. Centre-ville, Montréal, QC H3C 3P8, Canada; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 rue du PEPS, P.O. Box 10380, Stn. Sainte-Foy, Québec, QC G1V 4C7, Canada; École Pratique des Hautes Études, PSL University, Paris, France; Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, 445 Boulevard de l'Université, Rouyn-Noranda, QC J9X 5E4, Canada
推荐引用方式 GB/T 7714	Gaboriau D.M.,Remy C.C.,Girardin M.P.,et al. Temperature and fuel availability control fire size/severity in the boreal forest of central Northwest Territories; Canada[J],2020,250.
APA	Gaboriau D.M..,Remy C.C..,Girardin M.P..,Asselin H..,Hély C..,...&Ali A.A..(2020).Temperature and fuel availability control fire size/severity in the boreal forest of central Northwest Territories; Canada.Quaternary Science Reviews,250.
MLA	Gaboriau D.M.,et al."Temperature and fuel availability control fire size/severity in the boreal forest of central Northwest Territories; Canada".Quaternary Science Reviews 250(2020).