气候变化领域集成服务门户(CCPortal): Apportioned primary and secondary organic aerosol during pollution events of DISCOVER-AQ Houston

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DOI	10.1016/j.atmosenv.2020.117954
	Apportioned primary and secondary organic aerosol during pollution events of DISCOVER-AQ Houston
	Yoon S.; Ortiz S.M.; Clark A.E.; Barrett T.E.; Usenko S.; Duvall R.M.; Ruiz L.H.; Bean J.K.; Faxon C.B.; Flynn J.H.; III; Lefer B.L.; Leong Y.J.; Griffin R.J.; Sheesley R.J.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	Understanding the drivers for high ozone (O3) and atmospheric particulate matter (PM) concentrations is a pressing issue in urban air quality, as this understanding informs decisions for control and mitigation of these key pollutants. The Houston, TX metropolitan area is an ideal location for studying the intersection between O3 and atmospheric secondary organic carbon (SOC) production due to the diversity of source types (urban, industrial, and biogenic) and the on- and off-shore cycling of air masses over Galveston Bay, TX. Detailed characterization of filter-based samples collected during Deriving Information on Surface Conditions from Column and VERtically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) Houston field experiment in September 2013 were used to investigate sources and composition of organic carbon (OC) and potential relationships between daily maximum 8 h average O3 and PM. The current study employed a novel combination of chemical mass balance modeling defining primary (i.e. POC) versus secondary (i.e. SOC) organic carbon and radiocarbon (14C) for apportionment of contemporary and fossil carbon. The apportioned sources include contemporary POC (biomass burning [BB], vegetative detritus), fossil POC (motor vehicle exhaust), biogenic SOC and fossil SOC. The filter-based results were then compared with real-time measurements by aerosol mass spectrometry. With these methods, a consistent urban background of contemporary carbon and motor vehicle exhaust was observed in the Houston metropolitan area. Real-time and filter-based characterization both showed that carbonaceous aerosols in Houston was highly impacted by SOC or oxidized OC, with much higher contributions from biogenic than fossil sources. However, fossil SOC concentration and fractional contribution had a stronger correlation with daily maximum 8 h average O3, peaking during high PM and O3 events. The results indicate that point source emissions processed by on- and off-shore wind cycles likely contribute to peak events for both PM and O3 in the greater Houston metropolitan area. © 2020 Elsevier Ltd
关键词	High resolution time of flight aerosol mass spectrometer Organic aerosols Ozone Radiocarbon Source apportionment Urban air quality
语种	英语
scopus关键词	Aerosols; Air quality; Atmospheric chemistry; Mass spectrometry; Particulate emissions; Aerosol mass spectrometry; Atmospheric particulate matter; Carbonaceous aerosol; Chemical mass balance model; Point source emissions; Real time measurements; Secondary organic aerosols; Secondary organic carbons (SOC); Organic carbon; carbon; carbon 14; organic carbon; ozone; aerosol; air quality; atmospheric pollution; biomass burning; chemical mass balance; metropolitan area; organic compound; ozone; particulate matter; point source pollution; railway construction; urban atmosphere; air; air pollution; air quality; Article; atmospheric particulate matter; biogeochemical cycling; carbon footprint; controlled study; exhaust gas; fossil; industrial area; mass; mass spectrometry; measurement; oxidation; photochemistry; priority journal; secondary organic aerosol; Texas; urban area; wind; Galveston Bay; Houston; Texas; United States
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248828
作者单位	Department of Environmental Science, Baylor University, Waco, TX, United States; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, United States; Department of Chemistry and Biochemistry, Baylor University, Waco, TX, United States; Department of Natural Sciences, Oregon Institute of Technology, Klamath Falls, OR, United States; Institute of Ecological, Earth, and Environmental Sciences, Baylor University, Waco, TX, United States; Department of Geography and the Environment, University of North Texas, Denton, TX, United States; Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC, United States; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX, United States; Earth Sciences Division, The National Aeronautics and Space Administration, Washington, D.C, United States; Department of Civil and Environmental Engineering, Rice University, Houston, TX, United States; Department of Chemical ...
推荐引用方式 GB/T 7714	Yoon S.,Ortiz S.M.,Clark A.E.,et al. Apportioned primary and secondary organic aerosol during pollution events of DISCOVER-AQ Houston[J],2021,244.
APA	Yoon S..,Ortiz S.M..,Clark A.E..,Barrett T.E..,Usenko S..,...&Sheesley R.J..(2021).Apportioned primary and secondary organic aerosol during pollution events of DISCOVER-AQ Houston.ATMOSPHERIC ENVIRONMENT,244.
MLA	Yoon S.,et al."Apportioned primary and secondary organic aerosol during pollution events of DISCOVER-AQ Houston".ATMOSPHERIC ENVIRONMENT 244(2021).