Inderscience Publishers

Seasonal and diurnal characteristics of surface level O3 and its precursors in the north-central part of India

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Surface measurements of ozone and its precursor gases NO2 and CO have been made over an urban site of Agra (semi-arid region) for year 2005. O3, NO2 and CO show diurnal variations during all seasons. Overall increased concentration of O3 is majority attributed to increase in concentrations of NO2 and CO. The highest average concentration of O3 was observed in winters, followed by summers and monsoon. Similar trends were observed for NO2 and CO. Significant correlation was found for O3 with temperature and solar radiation whereas its correlation with relative humidity was not significant.

Keywords: north-central India, ozone, precursor gases, photochemical production, semi-arid regions, air pollution, air quality

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