2. Earth System Research Laboratory, Chemical Sciences Division, NOAA VOC species and emission inventory from vehicles and their SOA formation potentials estimation in Shanghai, China Huang Cheng1, Wang Hongli1, Li Li1, Lu Qing1, Wang Qian1, J. A. de Gouw2 1. State Environmental Protection Key Laboratory of the Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences 2. Earth System Research Laboratory, Chemical Sciences Division, NOAA GEIA Workshop 2015.11.18

Motivation of this study YRD region, China Shanghai, China Contributions of vehicle emissions to primary and secondary organic aerosols in the urban atmosphere? Gasoline or diesel: which one is more important?

Development of Vehicle emission inventory Vehicle emission inventory Traffic flow data Emission factors Vehicle emission inventory [Chen et al., 2007; Huo et al., 2012a; Huo et al., 2012b; Wu et al., 2012; Huang et al., 2013]

VOC species of the exhausts from different vehicle types Gasoline exhaust Diesel exhaust Motorcycle

Comparisons of gasoline quality limits Comparisons of VOC species from vehicle emissions in different countries/regions Comparisons of gasoline quality limits Contents Stage 3 (China) Stage 4 Stage 5 Euro 5 (Europe) Tier 2 (US) Sulfur, ppm ≤350 ≤50 ≤10 ≤15 Olefine, %(V/V) ≤30 ≤28 ≤25 ≤18 Aromatic, %(V/V) ≤40 ≤35 ≤22-25 Benzen, %(V/V) ≤1.0

POA and estimated SOA productions POA emissions and estimated SOA yields from gasoline and diesel vehicles VOCs IVOCs SVOCs Estimated SOA yields POA and estimated SOA productions

Veh. OA/CO vs. Obs. OA/CO Summer Winter Veh. POA/CO Veh. POA/CO Vehicles dominated POA emissions in the urban atmosphere in Shanghai. Existed VOC species data was far away to explain SOA formation. No IVOC data. Other VOC emission sources (e.g. solvent use, Petro and chemical industry, etc.)

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