globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD027976
Scopus记录号: 2-s2.0-85042292700
论文题名:
Chemistry of Volatile Organic Compounds in the Los Angeles Basin: Formation of Oxygenated Compounds and Determination of Emission Ratios
作者: de Gouw J.A.; Gilman J.B.; Kim S.-W.; Alvarez S.L.; Dusanter S.; Graus M.; Griffith S.M.; Isaacman-VanWertz G.; Kuster W.C.; Lefer B.L.; Lerner B.M.; McDonald B.C.; Rappenglück B.; Roberts J.M.; Stevens P.S.; Stutz J.; Thalman R.; Veres P.R.; Volkamer R.; Warneke C.; Washenfelder R.A.; Young C.J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:4
起始页码: 2298
结束页码: 2319
语种: 英语
英文关键词: anthropogenic emissions ; ozone pollution ; volatile organic compounds
Scopus关键词: anthropogenic source ; carbon monoxide ; chemical reaction ; emission ; hydrocarbon ; hydroxyl radical ; ketone ; oxygenation ; ozone ; traffic emission ; volatile organic compound ; California ; Los Angeles Basin ; United States
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 ~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. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114435
Appears in Collections:气候减缓与适应

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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, United States; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, United States; IMT Lille Douai, SAGE, Département Sciences de l'Atmosphère et Génie de l'Environnement, University Lille, Lille, France; Now at Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria; Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong; Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States; Now at NASA Earth Science Division, Washington, DC, United States; Now at Aerodyne Research, Billerica, MA, United States; School of Public and Environmental Affairs, Indiana University, Bloomington, IN, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Department of Chemistry, Snow College, Richfield, UT, United States; Now at Department of Chemistry, York University, Toronto, Canada

Recommended Citation:
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,2018-01-01,123(4)
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