气候变化领域集成服务门户(CCPortal): Ignition frequency and climate controlled Alaskan tundra fires during the Common Era

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DOI	10.1016/j.quascirev.2022.107418
	Ignition frequency and climate controlled Alaskan tundra fires during the Common Era
	Vachula, Richard S.; Liang, Jie; Sae-Lim, Jarunetr; Xie, Haichao
通讯作者	Vachula, RS (通讯作者)
发表日期	2022
ISSN	0277-3791
EISSN	1873-457X
卷号	280
英文摘要	Recent fire events in Alaskan tundra ecosystems have been identified as harbingers of climate change and have caused reassessment of more traditional thinking about fire activity in this high-latitude biome. Although some work has demonstrated the novelty of these fires and linked weather, climate, and environmental variables to their occurrence, our understanding of their long-term (multi-decadal and centennial-scale) and spatially broad-scale climatic controls remains preliminary. We address this gap by comparing paleofire records with relevant climate, vegetation, and environmental datasets to identify the most important controls of tundra fire and assess their relative importance (using machine learning techniques). Additionally, we assess likely causal relationships of these environmental variables and fire activity using structural equation models (SEMs). We find that atmospheric CO2 is the primary control of tundra fire, followed by summer temperature, and precipitation. We infer that atmospheric CO2 directly increases lightning ignition frequencies while also promoting warm, dry climatic conditions conducive to fire. This inference is supported by analyses of observational lightning and fire data and is further supported by recent work identifying lightning as the dominant control of tundra fire occurrence. These findings are alarming in light of rising atmospheric CO2 and climate projections. (C) 2022 Elsevier Ltd. All rights reserved.
关键词	ARCTIC TUNDRA CHARCOAL RECORDS EASTERN BERINGIA POLLEN RECORDS NORTH SLOPE CARBON VARIABILITY FUTURE FLUCTUATIONS OCCURRENCES
英文关键词	Anthropogenic; Charcoal; Paleofire; Lightning; Arctic; Climate feedback; Shrubification
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000766920800008
来源期刊	QUATERNARY SCIENCE REVIEWS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260714
推荐引用方式 GB/T 7714	Vachula, Richard S.,Liang, Jie,Sae-Lim, Jarunetr,et al. Ignition frequency and climate controlled Alaskan tundra fires during the Common Era[J]. 中国科学院青藏高原研究所,2022,280.
APA	Vachula, Richard S.,Liang, Jie,Sae-Lim, Jarunetr,&Xie, Haichao.(2022).Ignition frequency and climate controlled Alaskan tundra fires during the Common Era.QUATERNARY SCIENCE REVIEWS,280.
MLA	Vachula, Richard S.,et al."Ignition frequency and climate controlled Alaskan tundra fires during the Common Era".QUATERNARY SCIENCE REVIEWS 280(2022).