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Ground level NO2 trends on a diurnal scale over a metropolitan coastal city, Chennai, India

Author:

Muthulakshmi Balamurugan, Johnson Jeyakumar, S., Vijayalakshmi, S. and Kartharinal Punithavathy, I.

Subject Area:

Physical Sciences and Engineering

Abstract:

Nitrogen oxides are major pollutants in the atmosphere, being a precursor to acid rain, photochemical smog, and ozone accumulation. Measurements of NO2 and meteorological parameters (temperature, relative humidity, and wind speed) data over a period of two years (October 2014– September 2016) have been utilized to evaluate the NO2 concentration levels over the area Ashok Pillar, Chennai. It is a steamy site which is situated at 13°08′N and 80°27′E on the southeast coast of India. The Diurnal, Seasonal and Annual pattern of NO2 values over the study period has also been analyzed. The monthly variation of meteorological parameters shows little changes as it is being a coastal site. The changes in the No2 level have been mostly influenced by the traffic intensity.

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