Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027976 |
Chemistry of Volatile Organic Compounds in the Los Angeles Basin: Formation of Oxygenated Compounds and Determination of Emission Ratios | |
de Gouw, J. A.1,2,3; Gilman, J. B.2; Kim, S. -W.1,2; Alvarez, S. L.4; Dusanter, S.5; Graus, M.1,2,6; Griffith, S. M.7; Isaacman-VanWertz, G.8; Kuster, W. C.2; Lefer, B. L.4,9; Lerner, B. M.1,2,10; McDonald, B. C.1,2; Rappengluck, B.4; Roberts, J. M.2; Stevens, P. S.11; Stutz, J.12; Thalman, R.13; Veres, P. R.1,2; Volkamer, R.1,3; Warneke, C.1,2; Washenfelder, R. A.2; Young, C. J.1,2,14 | |
2018-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:4页码:2298-2319 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France; Austria; Peoples R China; Canada |
英文摘要 | We analyze an expanded data set of oxygenated volatile organic compounds (OVOCs) in air measured by several instruments at a surface site in Pasadena near Los Angeles during the National Oceanic and Atmospheric Administration California Nexus study in 2010. The contributions of emissions, chemical formation, and removal are quantified for each OVOC using CO as a tracer of emissions and the OH exposure of the sampled air masses calculated from hydrocarbon ratios. The method for separating emissions from chemical formation is evaluated using output for Pasadena from the Weather Research and Forecasting-Chemistry model. The model is analyzed by the same method as the measurement data, and the emission ratios versus CO calculated from the model output agree for ketones with the inventory used in the model but overestimate aldehydes by similar to 70%. In contrast with the measurements, nighttime formation of OVOCs is significant in the model and is attributed to overestimated precursor emissions and overestimated rate coefficients for the reactions of the precursors with ozone and NO3. Most measured aldehydes correlated strongly with CO at night, suggesting a contribution from motor vehicle emissions. However, the emission ratios of most aldehydes versus CO are higher than those reported in motor vehicle emissions and the aldehyde sources remain unclear. Formation of several OVOCs is investigated in terms of the removal of specific precursors. Direct emissions of alcohols and aldehydes contribute significantly to OH reactivity throughout the day, and these emissions should be accurately represented in models describing ozone formation. Plain Language Summary We report new measurements of volatile organic compounds (VOCs) in ambient air in the Los Angeles basin. Chemical reactions between VOCs and nitrogen oxides form ozone and fine particles, two important pollutants in Los Angeles smog. It is therefore important to understand VOC emission sources. In this work, we derive the composition of VOC emissions using ambient measurements at Pasadena in 2010. The study is complicated due to rapid chemical reactions that can form and remove VOCs in between the time of emission and measurement. After correcting for this chemistry, it is shown that emissions of many oxygen-containing VOCs are important for the formation of ozone. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427774500024 |
WOS关键词 | GAS-PHASE REACTIONS ; MOTOR-VEHICLE EMISSIONS ; CALIFORNIA REFORMULATED GASOLINE ; AIR-POLLUTION SOURCES ; ATMOSPHERIC CHEMISTRY ; SOURCE APPORTIONMENT ; OH RADICALS ; FORMALDEHYDE MEASUREMENTS ; REACTIVE HYDROCARBONS ; RESOLVED MEASUREMENTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33034 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.NOAA, Earth Syst Res Lab, Boulder, CO 80305 USA; 3.Univ Colorado, Dept Chem & Biochem, Campus Box 215, Boulder, CO 80309 USA; 4.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX USA; 5.Univ Lille, IMT Lille Douai, SAGE, Dept Sci Atmosphere & Genie Environm, Lille, France; 6.Univ Innsbruck, Inst Atmospher & Cryospher Sci, Innsbruck, Austria; 7.Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong, Hong Kong, Peoples R China; 8.Virginia Polytech Inst & State Univ, Dept Civil & Environm Engn, Blacksburg, VA 24061 USA; 9.NASA, Div Earth Sci, Washington, DC 20546 USA; 10.Aerodyne Res Inc, Billerica, MA USA; 11.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN USA; 12.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA; 13.Snow Coll, Dept Chem, Richfield, UT USA; 14.York Univ, Dept Chem, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | de Gouw, J. A.,Gilman, J. B.,Kim, S. -W.,et al. Chemistry of Volatile Organic Compounds in the Los Angeles Basin: Formation of Oxygenated Compounds and Determination of Emission Ratios[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(4):2298-2319. |
APA | de Gouw, J. A..,Gilman, J. B..,Kim, S. -W..,Alvarez, S. L..,Dusanter, S..,...&Young, C. J..(2018).Chemistry of Volatile Organic Compounds in the Los Angeles Basin: Formation of Oxygenated Compounds and Determination of Emission Ratios.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(4),2298-2319. |
MLA | de Gouw, J. A.,et al."Chemistry of Volatile Organic Compounds in the Los Angeles Basin: Formation of Oxygenated Compounds and Determination of Emission Ratios".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.4(2018):2298-2319. |
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