globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50059
论文题名:
Emission ratios of anthropogenic volatile organic compounds in northern mid-latitude megacities: Observations versus emission inventories in Los Angeles and Paris
作者: Borbon A.; Gilman J.B.; Kuster W.C.; Grand N.; Chevaillier S.; Colomb A.; Dolgorouky C.; Gros V.; Lopez M.; Sarda-Esteve R.; Holloway J.; Stutz J.; Petetin H.; McKeen S.; Beekmann M.; Warneke C.; Parrish D.D.; De Gouw J.A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:4
起始页码: 2041
结束页码: 2057
语种: 英语
英文关键词: air composition ; NMHC ; OVOC ; road transport ; SOA potential ; urban area
Scopus关键词: Air quality ; Carbon monoxide ; Climate change ; Paraffins ; Volatile organic compounds ; NMHC ; OVOC ; Road transports ; SOA potential ; Urban areas ; Gasoline ; air quality ; anthropogenic source ; aromatic hydrocarbon ; atmospheric pollution ; carbon monoxide ; climate change ; emission inventory ; hydroxyl radical ; latitude ; megacity ; road transport ; spatial variation ; urban area ; urban pollution ; volatile organic compound ; California ; France ; Ile de France ; Los Angeles [California] ; Paris ; United States ; Ville de Paris
英文摘要: Ground-based and airborne volatile organic compound (VOC) measurements in Los Angeles, California, and Paris, France, during the Research at the Nexus of Air Quality and Climate Change (CalNex) and Megacities: Emissions, Urban, Regional and Global Atmospheric Pollution and Climate Effects, and Integrated Tools for Assessment and Mitigation (MEGAPOLI) campaigns, respectively, are used to examine the spatial variability of the composition of anthropogenic VOC urban emissions and to evaluate regional emission inventories. Two independent methods that take into account the effect of chemistry were used to determine the emission ratios of anthropogenic VOCs (including anthropogenic isoprene and oxygenated VOCs) over carbon monoxide (CO) and acetylene. Emission ratios from both methods agree within ±20%, showing the reliability of our approach. Emission ratios for alkenes, alkanes, and benzene are fairly similar between Los Angeles and Paris, whereas the emission ratios for C7-C9 aromatics in Paris are higher than in Los Angeles and other French and European Union urban areas by a factor of 2-3. The results suggest that the emissions of gasoline-powered vehicles still dominate the hydrocarbon distribution in northern mid-latitude urban areas, which disagrees with emission inventories. However, regional characteristics like the gasoline composition could affect the composition of hydrocarbon emissions. The observed emission ratios show large discrepancies by a factor of 2-4 (alkanes and oxygenated VOC) with the ones derived from four reference emission databases. A bias in CO emissions was also evident for both megacities. Nevertheless, the difference between measurements and inventory in terms of the overall OH reactivity is, in general, lower than 40%, and the potential to form secondary organic aerosols (SOA) agrees within 30% when considering volatile organic emissions as the main SOA precursors. Key PointsUrban VOC emission ratios are compared in two modern megacitiesGasoline- powered vehicles emissions are still the dominant VOC urban sourceObservations/ inventory differences are <40% in terms of OH-reactvity and SOAP © 2013. 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/63923
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), F-94010 Créteil, France; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; NOAA Earth System Research Laboratory, Boulder, CO, United States; LaMP, Université Blaise Pascal, CNRS, Aubière, France; Laboratoire des Sciences du Climat et de l'Environnement, Université de Versailles Saint Quentin en Yvelines, CNRS, Gif-sur-Yvette, France; Department of Atmospheric Sciences, University of California, Los Angeles, CA, United States

Recommended Citation:
Borbon A.,Gilman J.B.,Kuster W.C.,et al. Emission ratios of anthropogenic volatile organic compounds in northern mid-latitude megacities: Observations versus emission inventories in Los Angeles and Paris[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(4)
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