气候变化领域集成服务门户(CCPortal): Overlooked organic vapor emissions from thawing Arctic permafrost

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DOI	10.1088/1748-9326/abb62d
	Overlooked organic vapor emissions from thawing Arctic permafrost
	Li H.; Väliranta M.; Mäki M.; Kohl L.; Sannel A.B.K.; Pumpanen J.; Koskinen M.; Bäck J.; Bianchi F.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Volatile organic compounds (VOCs) play an essential role in climate change and air pollution by modulating tropospheric oxidation capacity and providing precursors for ozone and aerosol formation. Arctic permafrost buries large quantities of frozen soil carbon, which could be released as VOCs with permafrost thawing or collapsing as a consequence of global warming. However, due to the lack of reported studies in this field and the limited capability of the conventional measurement techniques, it is poorly understood how much VOCs could be emitted from thawing permafrost and the chemical speciation of the released VOCs. Here we apply a Vocus proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF) in laboratory incubations for the first time to examine the release of VOCs from thawing permafrost peatland soils sampled from Finnish Lapland. The warming-induced rapid VOC emissions from the thawing soils were mainly attributed to the direct release of old, trapped gases from the permafrost. The average VOC fluxes from thawing permafrost were four times as high as those from the active layer (the top layer of soil in permafrost terrain). The emissions of less volatile compounds, i.e. sesquiterpenes and diterpenes, increased substantially with rising temperatures. Results in this study demonstrate the potential for substantive VOC releases from thawing permafrost. We anticipate that future global warming could stimulate VOC emissions from the Arctic permafrost, which may significantly influence the Arctic atmospheric chemistry and climate change. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Arctic; atmospheric chemistry; thawing permafrost; volatile organic compounds
语种	英语
scopus关键词	Air pollution; Atmospheric chemistry; Chemical speciation; Global warming; Mass spectrometers; Proton transfer; Thawing; Volatile organic compounds; Aerosol formation; Conventional measurements; Oxidation capacity; Permafrost thawing; Proton transfer reactions; Rising temperatures; Time-of-flight mass spectrometers; Volatile compounds; Permafrost; active layer; aerosol formation; atmospheric chemistry; atmospheric pollution; climate change; emission; frozen ground; organic compound; oxidation; ozone; peatland; permafrost; soil carbon; speciation (chemistry); thawing; troposphere; volatile organic compound; Finland; Lappi [Finland]
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/153591
作者单位	Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland; Ecru, Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland; Institute for Atmospheric and Earth System Research/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland; Department of Agricultural Science, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland; Department of Physical Geography, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland; Finnish Meteorological Institute, Helsinki, Finland
推荐引用方式 GB/T 7714	Li H.,Väliranta M.,Mäki M.,et al. Overlooked organic vapor emissions from thawing Arctic permafrost[J],2020,15(10).
APA	Li H..,Väliranta M..,Mäki M..,Kohl L..,Sannel A.B.K..,...&Bianchi F..(2020).Overlooked organic vapor emissions from thawing Arctic permafrost.Environmental Research Letters,15(10).
MLA	Li H.,et al."Overlooked organic vapor emissions from thawing Arctic permafrost".Environmental Research Letters 15.10(2020).