气候变化领域集成服务门户(CCPortal): Emissions of Trace Organic Gases From Western U.S. Wildfires Based on WE-CAN Aircraft Measurements

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DOI	10.1029/2020JD033838
	Emissions of Trace Organic Gases From Western U.S. Wildfires Based on WE-CAN Aircraft Measurements
	Permar W.; Wang Q.; Selimovic V.; Wielgasz C.; Yokelson R.J.; Hornbrook R.S.; Hills A.J.; Apel E.C.; Ku I.-T.; Zhou Y.; Sive B.C.; Sullivan A.P.; Collett J.L.; Jr.; Campos T.L.; Palm B.B.; Peng Q.; Thornton J.A.; Garofalo L.A.; Farmer D.K.; Kreidenweis S.M.; Levin E.J.T.; DeMott P.J.; Flocke F.; Fischer E.V.; Hu L.
发表日期	2021
ISSN	2169897X
卷号	126 期号:11
英文摘要	We present emission measurements of volatile organic compounds (VOCs) for western U.S. wildland fires made on the NSF/NCAR C-130 research aircraft during the Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN) field campaign in summer 2018. VOCs were measured with complementary instruments onboard the C-130, including a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) and two gas chromatography (GC)-based methods. Agreement within combined instrument uncertainties (<60%) was observed for most co-measured VOCs. GC-based measurements speciated the isomeric contributions to selected PTR-ToF-MS ion masses and generally showed little fire-to-fire variation. We report emission ratios (ERs) and emission factors (EFs) for 161 VOCs measured in 31 near-fire smoke plume transects of 24 specific individual fires sampled in the afternoon when burning conditions are typically most active. Modified combustion efficiency (MCE) ranged from 0.85 to 0.94. The measured campaign-average total VOC EF was 26.1 ± 6.9 g kg−1, approximately 67% of which is accounted for by oxygenated VOCs. The 10 most abundantly emitted species contributed more than half of the total measured VOC mass. We found that MCE alone explained nearly 70% of the observed variance for total measured VOC emissions (r2 = 0.67) and >50% for 57 individual VOC EFs representing more than half the organic carbon mass. Finally, we found little fire-to-fire variability for the mass fraction contributions of individual species to the total measured VOC emissions, suggesting that a single speciation profile can describe VOC emissions for the wildfires in coniferous ecosystems sampled during WE-CAN. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Biomass burning emissions; emission factors; PTR-ToF-MS; volatile organic compounds; WE-CAN; western U.S. wildfires
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/185183
作者单位	Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, United States; Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Air Resources Division, National Park Service, Denver, CO, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Chemistry, Colorado State University, Fort Collins, CO, United States; Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed, Guizhou Education University, Guiyang, China; Handix Scientific, Boulder, CO, United States
推荐引用方式 GB/T 7714	Permar W.,Wang Q.,Selimovic V.,et al. Emissions of Trace Organic Gases From Western U.S. Wildfires Based on WE-CAN Aircraft Measurements[J],2021,126(11).
APA	Permar W..,Wang Q..,Selimovic V..,Wielgasz C..,Yokelson R.J..,...&Hu L..(2021).Emissions of Trace Organic Gases From Western U.S. Wildfires Based on WE-CAN Aircraft Measurements.Journal of Geophysical Research: Atmospheres,126(11).
MLA	Permar W.,et al."Emissions of Trace Organic Gases From Western U.S. Wildfires Based on WE-CAN Aircraft Measurements".Journal of Geophysical Research: Atmospheres 126.11(2021).