气候变化领域集成服务门户(CCPortal): Emissions of Reactive Nitrogen From Western U.S. Wildfires During Summer 2018

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DOI	10.1029/2020JD032657
	Emissions of Reactive Nitrogen From Western U.S. Wildfires During Summer 2018
	Lindaas J.; Pollack I.B.; Garofalo L.A.; Pothier M.A.; Farmer D.K.; Kreidenweis S.M.; Campos T.L.; Flocke F.; Weinheimer A.J.; Montzka D.D.; Tyndall G.S.; Palm B.B.; Peng Q.; Thornton J.A.; Permar W.; Wielgasz C.; Hu L.; Ottmar R.D.; Restaino J.C.; Hudak A.T.; Ku I.-T.; Zhou Y.; Sive B.C.; Sullivan A.; Collett J.L.; Jr.; Fischer E.V.
发表日期	2021
ISSN	2169897X
卷号	126 期号:2
英文摘要	Reactive nitrogen (Nr) within smoke plumes plays important roles in the production of ozone, the formation of secondary aerosols, and deposition of fixed N to ecosystems. The Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN) field campaign sampled smoke from 23 wildfires throughout the western U.S. during summer 2018 using the NSF/NCAR C-130 research aircraft. We empirically estimate Nr normalized excess mixing ratios and emission factors from fires sampled within 80 min of estimated emission and explore variability in the dominant forms of Nr between these fires. We find that reduced N compounds comprise a majority (39%–80%; median = 66%) of total measured reactive nitrogen (ΣNr) emissions. The smoke plumes sampled during WE-CAN feature rapid chemical transformations after emission. As a result, within minutes after emission total measured oxidized nitrogen (ΣNOy) and measured total ΣNHx (NH3 + pNH4) are more robustly correlated with modified combustion efficiency (MCE) than NOx and NH3 by themselves. The ratio of ΣNHx/ΣNOy displays a negative relationship with MCE, consistent with previous studies. A positive relationship with total measured ΣNr suggests that both burn conditions and fuel N content/volatilization differences contribute to the observed variability in the distribution of reduced and oxidized Nr. Additionally, we compare our in situ field estimates of Nr EFs to previous lab and field studies. For similar fuel types, we find ΣNHx EFs are of the same magnitude or larger than lab-based NH3 EF estimates, and ΣNOy EFs are smaller than lab NOx EFs. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	ammonia; emissions; nitrogen oxides; reactive nitrogen; wildfire smoke
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/185542
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Chemistry, Colorado State University, Fort Collins, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, United States; Pacific Northwest Research Station, USDA Forest Service, Seattle, WA, United States; California Department of Forestry and Fire Protection, Sacramento, CA, United States; Rocky Mountain Research Station, USDA Forest Service, Moscow, ID, United States; Air Resources Division, National Park Service, Denver, CO, United States
推荐引用方式 GB/T 7714	Lindaas J.,Pollack I.B.,Garofalo L.A.,et al. Emissions of Reactive Nitrogen From Western U.S. Wildfires During Summer 2018[J],2021,126(2).
APA	Lindaas J..,Pollack I.B..,Garofalo L.A..,Pothier M.A..,Farmer D.K..,...&Fischer E.V..(2021).Emissions of Reactive Nitrogen From Western U.S. Wildfires During Summer 2018.Journal of Geophysical Research: Atmospheres,126(2).
MLA	Lindaas J.,et al."Emissions of Reactive Nitrogen From Western U.S. Wildfires During Summer 2018".Journal of Geophysical Research: Atmospheres 126.2(2021).