气候变化领域集成服务门户(CCPortal): Climate exceeded human management as the dominant control of fire at the regional scale in California's Sierra Nevada

CCPortal

DOI	10.1088/1748-9326/ab4669
	Climate exceeded human management as the dominant control of fire at the regional scale in California's Sierra Nevada
	Vachula R.S.; Russell J.M.; Huang Y.
发表日期	2019
ISSN	17489318
卷号	14 期号:10
英文摘要	The societal impacts of recent, severe fires in California highlight the need to understand the long-term effectiveness of human fire management. The relative influences of local management and climate at centennial timescales are controversial and poorly understood. This is the case in California's Sierra Nevada, an actively managed area with a rich history of Native American fire use. We analyzed charcoal preserved in lake sediments from Yosemite National Park and spanning the last 1400 years to reconstruct local and regional area burned. Warm and dry climates promoted burning at both local and regional scales. However, at local scales fire management by Native Americans before 850 and between ca. 1350 and 1600 CE and, subsequently, Yosemite park managers from ca. 1900 to 1970 CE, decoupled fire extent dictated by regional climate scenarios. Climate acts as a top-down, broader scale control of fire, but human management serves a bottom-up, local control. Regional area burned peaked during the Medieval Climate Anomaly and declined during the last millennium, as climate became cooler and wetter and Native American burning declined. This trend was accentuated by 20th century fire suppression policies, which led to a minimum in burned area relative to the last 1400 years. In light of projected anthropogenic greenhouse gas emissions and predicted climate changes in California, our data indicate that although active management can mitigate local fire activity, broader regional burning may become more spatially extensive than has been observed in the last century. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	climate change; fire management; paleoclimate; paleoecology; paleofire
语种	英语
scopus关键词	Charcoal; Climate change; Forestry; Gas emissions; Greenhouse gases; Active management; Anthropogenic greenhouse gas emissions; Local management; Medieval climate anomalies; Native Americans; Regional climate; Societal impacts; Yosemite National Park; Fires; anthropogenic effect; climate change; emission; fire management; greenhouse gas; Medieval Warm Period; park management; policy approach; regional climate; California; Sierra Nevada; United States; Yosemite National Park
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/154344
作者单位	Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, United States; Institute at Brown for Environment and Society, Brown University, Providence, RI 02912, United States
推荐引用方式 GB/T 7714	Vachula R.S.,Russell J.M.,Huang Y.. Climate exceeded human management as the dominant control of fire at the regional scale in California's Sierra Nevada[J],2019,14(10).
APA	Vachula R.S.,Russell J.M.,&Huang Y..(2019).Climate exceeded human management as the dominant control of fire at the regional scale in California's Sierra Nevada.Environmental Research Letters,14(10).
MLA	Vachula R.S.,et al."Climate exceeded human management as the dominant control of fire at the regional scale in California's Sierra Nevada".Environmental Research Letters 14.10(2019).