气候变化领域集成服务门户(CCPortal): Formaldehyde evolution in US wildfire plumes during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ)

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DOI	10.5194/acp-21-18319-2021
	Formaldehyde evolution in US wildfire plumes during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ)
	Liao J.; Wolfe G.M.; Hannun R.A.; St. Clair J.M.; Hanisco T.F.; Gilman J.B.; Lamplugh A.; Selimovic V.; Diskin G.S.; Nowak J.B.; Halliday H.S.; Digangi J.P.; Hall S.R.; Ullmann K.; Holmes C.D.; Fite C.H.; Agastra A.; Ryerson T.B.; Peischl J.; Bourgeois I.; Warneke C.; Coggon M.M.; Gkatzelis G.I.; Sekimoto K.; Fried A.; Richter D.; Weibring P.; Apel E.C.; Hornbrook R.S.; Brown S.S.; Womack C.C.; Robinson M.A.; Washenfelder R.A.; Veres P.R.; Neuman J.A.
发表日期	2021
ISSN	1680-7316
起始页码	18319
结束页码	18331
卷号	21 期号:24
英文摘要	Formaldehyde (HCHO) is one of the most abundant non-methane volatile organic compounds (VOCs) emitted by fires. HCHO also undergoes chemical production and loss as a fire plume ages, and it can be an important oxidant precursor. In this study, we disentangle the processes controlling HCHO by examining its evolution in wildfire plumes sampled by the NASA DC-8 during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ) field campaign. In 9 of the 12 analyzed plumes, dilution-normalized HCHO increases with physical age (range 1-6gh). The balance of HCHO loss (mainly via photolysis) and production (via OH-initiated VOC oxidation) seems to control the sign and magnitude of this trend. Plume-average OH concentrations, calculated from VOC decays, range from -0.5 (±g0.5)g×g106 to 5.3 (±g0.7)g×g106gcm-3. The production and loss rates of dilution-normalized HCHO seem to decrease with plume age. Plume-to-plume variability in dilution-normalized secondary HCHO production correlates with OH abundance rather than normalized OH reactivity, suggesting that OH is the main driver of fire-to-fire variability in HCHO secondary production. Analysis suggests an effective HCHO yield of 0.33 (±g0.05) per VOC molecule oxidized for the 12 wildfire plumes. This finding can help connect space-based HCHO observations to the oxidizing capacity of the atmosphere and to VOC emissions. © 2021 Jin Liao et al.
语种	英语
scopus关键词	air quality; atmospheric plume; concentration (composition); dilution; formaldehyde; volatile organic compound; wildfire; United States
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246356
作者单位	Atmospheric Chemistry and Dynamics Laboratory, Nasa Goddard Space Flight Center, Greenbelt, MD, United States; Goddard Earth Science Technology and Research (GESTAR) Ii, University of Maryland Baltimore County, Baltimore, MD, United States; Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, United States; Noaa Chemical Science Laboratory (CSL), Boulder, CO, United States; Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder, CO, United States; Department of Chemistry, University of Montana, Missoula, MT, United States; Nasa Langley Research Center, Hampton, VA, United States; Environmental Protection Agency, Durham, NC, United States; Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Earth Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Yokohama City University, Yokohama, Japan; Institute of ...
推荐引用方式 GB/T 7714	Liao J.,Wolfe G.M.,Hannun R.A.,et al. Formaldehyde evolution in US wildfire plumes during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ)[J],2021,21(24).
APA	Liao J..,Wolfe G.M..,Hannun R.A..,St. Clair J.M..,Hanisco T.F..,...&Neuman J.A..(2021).Formaldehyde evolution in US wildfire plumes during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ).ATMOSPHERIC CHEMISTRY AND PHYSICS,21(24).
MLA	Liao J.,et al."Formaldehyde evolution in US wildfire plumes during the Fire Influence on Regional to Global Environments and Air Quality experiment (FIREX-AQ)".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.24(2021).