气候变化领域集成服务门户(CCPortal): Empirical Insights Into the Fate of Ammonia in Western U.S. Wildfire Smoke Plumes

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DOI	10.1029/2020JD033730
	Empirical Insights Into the Fate of Ammonia in Western U.S. Wildfire Smoke Plumes
	Lindaas J.; Pollack I.B.; Calahorrano J.J.; O'Dell K.; Garofalo L.A.; Pothier M.A.; Farmer D.K.; Kreidenweis S.M.; Campos T.; Flocke F.; Weinheimer A.J.; Montzka D.D.; Tyndall G.S.; Apel E.C.; Hills A.J.; Hornbrook R.S.; Palm B.B.; Peng Q.; Thornton J.A.; Permar W.; Wielgasz C.; Hu L.; Pierce J.R.; Collett J.L.; Jr.; Sullivan A.P.; Fischer E.V.
发表日期	2021
ISSN	2169897X
卷号	126 期号:11
英文摘要	Wildfires are a major source of gas-phase ammonia (NH3) to the atmosphere. Quantifying the evolution and fate of this NH3 is important to understanding the formation of secondary aerosol in smoke and its accompanying effects on radiative balance and nitrogen deposition. Here, we use data from the Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN) to add new empirical constraints on the e-folding loss timescale of NH3 and its relationship with particulate ammonium (pNH4) within wildfire smoke plumes in the western U.S. during summer 2018. We show that the e-folding loss timescale of NH3 with respect to particle-phase partitioning ranges from ∼24 to ∼4000 min (median of 55 min). Within these same plumes, oxidation of nitrogen oxides is observed concurrent with increases in the fraction of pNH4 in each plume sampled, suggesting that formation of ammonium nitrate (NH4NO3) is likely. We find wide variability in how close our in situ measurements of NH4NO3 are to those expected in a dry thermodynamic equilibrium, and find that NH4NO3 is most likely to form in fresh, dense smoke plumes injected at higher altitudes and colder temperatures. In chemically older smoke we observe correlations between both the fraction of pNH4 and the fraction of particulate nitrate (pNO3) in the aerosol with temperature, providing additional evidence of the presence of NH4NO3 and the influence of injection height on gas-particle partitioning of NH3. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	ammonia; reactive nitrogen; smoke evolution; 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/185146
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, Atmospheric Chemistry Observations & Modeling Laboratory, 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
推荐引用方式 GB/T 7714	Lindaas J.,Pollack I.B.,Calahorrano J.J.,et al. Empirical Insights Into the Fate of Ammonia in Western U.S. Wildfire Smoke Plumes[J],2021,126(11).
APA	Lindaas J..,Pollack I.B..,Calahorrano J.J..,O'Dell K..,Garofalo L.A..,...&Fischer E.V..(2021).Empirical Insights Into the Fate of Ammonia in Western U.S. Wildfire Smoke Plumes.Journal of Geophysical Research: Atmospheres,126(11).
MLA	Lindaas J.,et al."Empirical Insights Into the Fate of Ammonia in Western U.S. Wildfire Smoke Plumes".Journal of Geophysical Research: Atmospheres 126.11(2021).