气候变化领域集成服务门户(CCPortal): On the contribution of nocturnal heterogeneous reactive nitrogen chemistry to particulate matter formation during wintertime pollution events in Northern Utah

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DOI	10.5194/acp-19-9287-2019
	On the contribution of nocturnal heterogeneous reactive nitrogen chemistry to particulate matter formation during wintertime pollution events in Northern Utah
	McDuffie E.E.; Womack C.C.; Fibiger D.L.; Dube W.P.; Franchin A.; Middlebrook A.M.; Goldberger L.; Lee B.H.; Thornton J.A.; Moravek A.; Murphy J.G.; Baasandorj M.; Brown S.S.
发表日期	2019
ISSN	16807316
起始页码	9287
结束页码	9308
卷号	19 期号:14
英文摘要	Mountain basins in Northern Utah, including the Salt Lake Valley (SLV), suffer from wintertime air pollution events associated with stagnant atmospheric conditions. During these events, fine particulate matter concentrations (PM2:5) can exceed national ambient air quality standards. Previous studies in the SLV have found that PM2:5 is primarily composed of ammonium nitrate (NH4NO3), formed from the condensation of gas-phase ammonia (NH3) and nitric acid (HNO3). Additional studies in several western basins, including the SLV, have suggested that production of HNO3 from nocturnal heterogeneous N2O5 uptake is the dominant source of NH4NO3 during winter. The rate of this process, however, remains poorly quantified, in part due to limited vertical measurements above the surface, where this chemistry is most active. The 2017 Utah Winter Fine Particulate Study (UWFPS) provided the first aircraft measurements of detailed chemical composition during wintertime pollution events in the SLV. Coupled with ground-based observations, analyses of day-and nighttime research flights confirm that PM2:5 during wintertime pollution events is principally composed of NH4NO3, limited by HNO3. Here, observations and box model analyses assess the contribution of N2O5 uptake to nitrate aerosol during pollution events using the NO-3 production rate, N2O5 heterogeneous uptake coefficient (?.N2O5/), and production yield of ClNO2 ('.ClNO2/), which had medians of 1.6 μg m-3 h-1, 0.076, and 0.220, respectively. While fit values of.N2O5/may be biased high by a potential under-measurement in aerosol surface area, other fit quantities are unaffected. Lastly, additional model simulations suggest nocturnal N2O5 uptake produces between 2.4 and 3.9 μg m-3 of nitrate per day when considering the possible effects of dilution. This nocturnal production is sufficient to account for 52 %-85 % of the daily observed surface-level buildup of aerosol nitrate, though accurate quantification is dependent on modeled dilution, mixing processes, and photochemistry. © 2019 Author(s).
语种	英语
scopus关键词	air quality; ambient air; ammonium nitrate; atmospheric chemistry; atmospheric pollution; concentration (composition); nitrogen; particulate matter; winter; United States; Utah
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/144265
作者单位	Chemical Sciences Division, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Department of Chemistry, University of Colorado, Boulder, CO, United States; Department of Atmospheric Science, University of Washington, Seattle, WA, United States; Department of Chemistry, University of Toronto, Toronto, ON, Canada; Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada; California Air Resources Board, Sacramento, CA, United States; ARM Aerial Facility, Pacific Northwest National Laboratory, Richland, WA, United States; Department of Chemistry, York University, Toronto, ON, Canada; Chevron Corporation, Houston, TX, United States
推荐引用方式 GB/T 7714	McDuffie E.E.,Womack C.C.,Fibiger D.L.,et al. On the contribution of nocturnal heterogeneous reactive nitrogen chemistry to particulate matter formation during wintertime pollution events in Northern Utah[J],2019,19(14).
APA	McDuffie E.E..,Womack C.C..,Fibiger D.L..,Dube W.P..,Franchin A..,...&Brown S.S..(2019).On the contribution of nocturnal heterogeneous reactive nitrogen chemistry to particulate matter formation during wintertime pollution events in Northern Utah.Atmospheric Chemistry and Physics,19(14).
MLA	McDuffie E.E.,et al."On the contribution of nocturnal heterogeneous reactive nitrogen chemistry to particulate matter formation during wintertime pollution events in Northern Utah".Atmospheric Chemistry and Physics 19.14(2019).