Influence of coastal wind on surface ozone and nitrogen oxides in suburban Shanghai |
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| Authors: | Wenpo Shan Peng Yang Haixia Lu Kefeng Ma Zhixin Huang |
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| Institution: | 1.Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing,China;2.College of Information Science and Technology,Agricultural University of Hebei,Baoding,China;3.Jinshan Environmental Protection Monitoring Station,Shanghai,China |
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| Abstract: | Surface ozone, NO, NO2, and NO x were measured at a coastal site (Shihua) and a nearby inland site (Zhujing) in suburban Shanghai for the whole year of 2009. More days with ozone pollution in a longer time range were observed at the coastal site than the inland site. The diurnal variations of NO x concentrations were obviously higher at Zhujing station, while those of ozone concentrations were higher at Shihua station, indicating their different air pollution conditions. Coastal wind has significant influence on the levels and characteristics of the air pollutants. The ozone concentrations during maritime winds (MW) were much higher than those during continental winds (CW) at each of the site, while the NO and NO2 concentrations were both opposite. The ozone concentrations at Shihua station were much higher than those at Zhujing station, while the NO and NO2 concentrations were both opposite. The ozone concentrations at both of the two sites showed a distinct “weekend effects” and “weekdays effects” patterns during CW and MW, respectively. Correlation analysis of the pollutants showed that, the compounds during MW were more age than those during CW, and the compounds at Shihua were more age than those at Zhujing. The air pollutions at both of the two sites are mainly associated with the pollutants emitted in this region instead of long range transport. |
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