Ozone changes in response to the heavy-duty diesel truck control in the Pearl River Delta

• Published in: Atmospheric environment (1994) Vol. 88; pp. 269 - 274
• Main Authors: Yu, Xin, Yuan, Zibing, Fung, J.C.H., Xue, Jian, Li, Ying, Zheng, Junyu, Lau, A.K.H.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-05-2014; Elsevier
• Subjects: Applied sciences; Atmospheric pollution; CMAQ; Exact sciences and technology; Mobile source emission; Ozone; Pearl River Delta; Pollution; Prevention and purification methods; Traffic control policy; Transports and other; Asia; China; Ozone; Mobile source emission; Pearl River Delta; CMAQ; Traffic control policy; Performance evaluation; Photochemical oxidants; Environmental policy; Pollution control; Diesel engine; Air quality; Motor vehicle; Heavy-duty vehicle; Heavy truck; Mobile pollutant sources; Atmospheric pollution forecasting; Traffic control; Air pollution; Pollution abatement
• ISSN: 1352-2310; 1873-2844
• DOI: 10.1016/j.atmosenv.2013.11.022

In recent years, restricting heavy-duty diesel trucks from driving within urban areas during the daytime is implemented in major PRD cities (e.g. Guangzhou and Shenzhen). Potential effects of this traffic control policy on spatial and temporal variations of O3 concentrations are examined by CMAQ model system. Temporal profiles of mobile source emissions are modified to reflect the emission characteristics after the control. Our results show that: (1) with the updated mobile emission profile, there is a notable improvement in O3 simulation performance for urban sites, with reductions in both the nighttime O3 overestimation (up to 25 ppb) and the daytime underestimation on O3 peak values (up to 20 ppb); (2) although the control policies are only applied in urban locations, their effects may extend to much larger downwind areas. The results from this study provide basic information that is useful in understanding the effects of mobile control policies on ambient O3 in highly developing regions of China where similar strategies have been widely implemented.