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

Authors: Renuka Saini, Amit Masih, P. Gur Sumiran Iyer, Ajay Taneja

Addresses: School of Chemical Sciences, Department of Chemistry, St. John's College, 22 – Allora Enclave, Dayalbagh, Agra 282005, India. ' School of Chemical Sciences, Department of Chemistry, St. John's College, 22 – Allora Enclave, Dayalbagh, Agra 282005, India. ' School of Chemical Sciences, Department of Chemistry, St. John's College, 22 – Allora Enclave, Dayalbagh, Agra 282005, India. ' School of Chemical Sciences, Department of Chemistry, St. John's College, 22 – Allora Enclave, Dayalbagh, Agra 282005, India

Abstract: 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.

DOI: 10.1504/IJEWM.2009.026888

International Journal of Environment and Waste Management, 2009 Vol.4 No.1/2, pp.126 - 139

Published online: 28 Jun 2009 *

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