气候变化领域集成服务门户(CCPortal): Daytime Oxidized Reactive Nitrogen Partitioning in Western U.S. Wildfire Smoke Plumes

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DOI	10.1029/2020JD033484
	Daytime Oxidized Reactive Nitrogen Partitioning in Western U.S. Wildfire Smoke Plumes
	Juncosa Calahorrano J.F.; Lindaas J.; O'Dell K.; Palm B.B.; Peng Q.; Flocke F.; Pollack I.B.; Garofalo L.A.; Farmer D.K.; Pierce J.R.; Collett J.L.; Jr.; Weinheimer A.; Campos T.; Hornbrook R.S.; Hall S.R.; Ullmann K.; Pothier M.A.; Apel E.C.; Permar W.; Hu L.; Hills A.J.; Montzka D.; Tyndall G.; Thornton J.A.; Fischer E.V.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	The Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN) deployed the NSF/NCAR C-130 aircraft in summer 2018 across the western U.S. to sample wildfire smoke during its first days of atmospheric evolution. We present a summary of a subset of reactive oxidized nitrogen species (NOy) in plumes sampled in a pseudo-Lagrangian fashion. Emissions of nitrogen oxides (NOx = NO + NO2) and nitrous acid (HONO) are rapidly converted to more oxidized forms. Within 4 h, ∼86% of the ΣNOy is in the form of peroxy acyl nitrates (PANs) (∼37%), particulate nitrate (pNO3) (∼27%), and gas-phase organic nitrates (Org N(g)) (∼23%). The average e-folding time and distance for NOx are ∼90 min and ∼40 km, respectively. Nearly no enhancements in nitric acid (HNO3) were observed in plumes sampled in a pseudo-Lagrangian fashion, implying HNO3-limited ammonium nitrate (NH4NO3) formation, with one notable exception that we highlight as a case study. We also summarize the observed partitioning of NOy in all the smoke samples intercepted during WE-CAN. In smoke samples intercepted above 3 km above sea level (ASL), the contributions of PANs and pNO3 to ΣNOy increase with altitude. WE-CAN also sampled smoke from multiple fires mixed with anthropogenic emissions over the California Central Valley. We distinguish samples where anthropogenic NOx emissions appear to lead to an increase in NOx abundances by a factor of four and contribute to additional PAN formation. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	biomass burning; oxidized reactive nitrogen; smoke plumes
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/185471
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Department of Chemistry, Colorado State University, Fort Collins, CO, United States; Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, United States
推荐引用方式 GB/T 7714	Juncosa Calahorrano J.F.,Lindaas J.,O'Dell K.,et al. Daytime Oxidized Reactive Nitrogen Partitioning in Western U.S. Wildfire Smoke Plumes[J],2021,126(4).
APA	Juncosa Calahorrano J.F..,Lindaas J..,O'Dell K..,Palm B.B..,Peng Q..,...&Fischer E.V..(2021).Daytime Oxidized Reactive Nitrogen Partitioning in Western U.S. Wildfire Smoke Plumes.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Juncosa Calahorrano J.F.,et al."Daytime Oxidized Reactive Nitrogen Partitioning in Western U.S. Wildfire Smoke Plumes".Journal of Geophysical Research: Atmospheres 126.4(2021).