Also, knowing how different policies can lead to diverse emissions is beneficial knowledge for other city governments.ĭevelopment of a high temporal-spatial resolution vehicle emission inventory based on NRT traffic data and its impact on air pollution in Beijing - Part 1: Development and evaluation of vehicle emission inventory The method to quantify vehicle emission on an urban scale can be applied to other Chinese cities. Although common features were found in these two cities (many new passenger cars and a high taxi proportion in the fleet), the emission results are dissimilar because of the different local policy regarding vehicles. The emissions analysis indicates that 3 t of particulate matter (PM), 199 t of nitrogen oxides (NO(x)), 192 t of volatile organic compounds (VOCs), and 2403 t of carbon monoxide (CO) are emitted from on-road vehicles each day in Beijing, whereas 4 t of PM, 189 t of NO(x), 113 t of VOCs, and 1009 t of CO are emitted in Shanghai. On the basis of the vehicle activity data, the International Vehicle Emission model is used to establish vehicle emission inventories. The methods were used to obtain credible results of vehicle activity in Beijing and Shanghai. This study created systemic methods to establish a vehicle emission inventory in Chinese cities. Vehicle emission inventory is a critical element for air quality study. Liu, Huan He, Kebin Wang, Qidong Huo, Hong Lents, James Davis, Nicole Nikkila, Nick Chen, Changhong Osses, Mauricio He, Chunyu Comparison of vehicle activity and emission inventory between Beijing and Shanghai.
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