气候变化领域集成服务门户(CCPortal): Extracting a History of Global Fire Emissions for the Past Millennium From Ice Core Records of Acetylene, Ethane, and Methane

CCPortal

DOI	10.1029/2020JD032932
	Extracting a History of Global Fire Emissions for the Past Millennium From Ice Core Records of Acetylene, Ethane, and Methane
	Nicewonger M.R.; Aydin M.; Prather M.J.; Saltzman E.S.
发表日期	2020
ISSN	2169897X
卷号	125 期号:20
英文摘要	Biomass burning is an important component of the Earth system in terms of global biogeochemistry, atmospheric composition, climate, terrestrial ecology, and land use. This study examines published ice core trace gas measurements of acetylene, ethane, and methane, which have been used as proxies for paleofire emissions. We investigate the consistency of these records for the past 1,000 years in terms of (1) temporal trends in global fire emissions and (2) quantitative estimates for changes in global burning (dry matter burned per year). Three-dimensional transport and box models were used to construct emissions scenarios for the trace gases consistent with each ice core record. Burning histories were inferred from trace gas emissions by accounting for biome-specific emission factors for each trace gas. The temporal trends in fire inferred from the trace gases are in reasonable agreement, with a large decline in biomass burning emissions from the Medieval Period (MP: 1000–1500 CE) to the Little Ice Age (LIA: 1650–1750 CE). However, the three trace gas ice core records do not yield a consistent fire history, even assuming dramatic (and unrealistic) changes in the spatial distribution of fire and biomes. Substantial changes in other factors such as meteorological transport or atmospheric photochemical lifetimes appear to be required to reconcile the trace gas records. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	acetylene; biomass burning; ethane; ice core; methane; paleofire
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185683
作者单位	Department of Earth System Science, University of California, Irvine, CA, United States; Department of Chemistry, University of California, Irvine, CA, United States
推荐引用方式 GB/T 7714	Nicewonger M.R.,Aydin M.,Prather M.J.,et al. Extracting a History of Global Fire Emissions for the Past Millennium From Ice Core Records of Acetylene, Ethane, and Methane[J],2020,125(20).
APA	Nicewonger M.R.,Aydin M.,Prather M.J.,&Saltzman E.S..(2020).Extracting a History of Global Fire Emissions for the Past Millennium From Ice Core Records of Acetylene, Ethane, and Methane.Journal of Geophysical Research: Atmospheres,125(20).
MLA	Nicewonger M.R.,et al."Extracting a History of Global Fire Emissions for the Past Millennium From Ice Core Records of Acetylene, Ethane, and Methane".Journal of Geophysical Research: Atmospheres 125.20(2020).