气候变化领域集成服务门户(CCPortal): Boreal blazes: biomass burning and vegetation types archived in the juneau icefield

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DOI	10.1088/1748-9326/ab8fd2
	Boreal blazes: biomass burning and vegetation types archived in the juneau icefield
	Kehrwald N.M.; Jasmann J.R.; Dunham M.E.; Ferris D.G.; Osterberg E.C.; Kennedy J.; Havens J.; Barber L.B.; Fortner S.K.
发表日期	2020
ISSN	17489318
卷号	15 期号:8
英文摘要	The past decade includes some of the most extensive boreal forest fires in the historical record. Warming temperatures, changing precipitation patterns, the desiccation of thick organic soil layers, and increased ignition from lightning all contribute to a combustive combination. Smoke aerosols travel thousands of kilometers, before blanketing the surfaces on which they fall, such as the Juneau Icefield. However, many aerosols found in smoke plumes are also produced by other processes and therefore can be ambiguous indicators of fire activity. Here, we use the monosaccharide anhydrides levoglucosan, mannosan, and galactosan as specific indicators of biomass burning to unambiguously demonstrate that fire aerosols reach the Juneau Icefield and are integrated into the snowpack. Back trajectories and satellite observations demonstrate that smoke plumes originating in central Alaska and eastern Siberia affect the Juneau Icefield. These regional sources of fire differ from other combustion aerosols deposited on the Juneau Icefield, such as black carbon, that originate from local fossil fuel burning. Ratios of levoglucosan/mannosan (L/M) and levoglucosan/(mannosan + galactosan) (L/(M + G)) demonstrate that while the majority of fire aerosols reaching the Juneau Icefield originate from softwood burning, grasslands and hardwood forests are also sources. The presence of these hardwoods suggests that fire aerosols may reach the Juneau Icefield from locations as far away as East Asia. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	alaska; combustion; fire; ice core; siberia; vegetation
语种	英语
scopus关键词	Aerosols; Deforestation; Fossil fuel deposits; Fossil fuels; Hardwoods; Smoke; Soils; Back trajectories; Combustion aerosols; Fossil fuel burning; Historical records; Monosaccharide anhydrides; Precipitation patterns; Regional sources; Satellite observations; Fires; aerosol composition; aerosol formation; biomass burning; black carbon; boreal forest; climate change; forest fire; global warming; ice field; precipitation assessment; vegetation type; Alaska; Juneau; United States
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/153870
作者单位	U.S. Geological Survey, Denver Federal Center, Denver, CO 80225, United States; U.S. Geological Survey, 3215 Marine Street Suite E127, Boulder, CO 80303, United States; Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, United States; Department of Chemistry and Biochemistry, South Dakota State University, University Station Brookings, Avera Health and Science 131SD 57007, United States; ADC Management Services Inc., 355 S. Teller St. Suite 200, Lakewood, CO 80226, United States; Department of Geology, Wittenberg University, BDK Science Center 125B, Springfield, OH 45504, United States
推荐引用方式 GB/T 7714	Kehrwald N.M.,Jasmann J.R.,Dunham M.E.,et al. Boreal blazes: biomass burning and vegetation types archived in the juneau icefield[J],2020,15(8).
APA	Kehrwald N.M..,Jasmann J.R..,Dunham M.E..,Ferris D.G..,Osterberg E.C..,...&Fortner S.K..(2020).Boreal blazes: biomass burning and vegetation types archived in the juneau icefield.Environmental Research Letters,15(8).
MLA	Kehrwald N.M.,et al."Boreal blazes: biomass burning and vegetation types archived in the juneau icefield".Environmental Research Letters 15.8(2020).