Annual and seasonal assessment of spatiotemporal variation in PM2.5 and gaseous air pollutants in Bengaluru, India

Gourav Suthar (), Rajat Prakash Singhal (), Sumit Khandelwal (), Nivedita Kaul (), Vinod Parmar () and Abhay Pratap Singh ()
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Gourav Suthar: Malaviya National Institute of Technology
Rajat Prakash Singhal: Malaviya National Institute of Technology
Sumit Khandelwal: Malaviya National Institute of Technology
Nivedita Kaul: Malaviya National Institute of Technology
Vinod Parmar: Malaviya National Institute of Technology
Abhay Pratap Singh: Malaviya National Institute of Technology

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2024, vol. 26, issue 8, No 61, 20629-20652

Abstract: Abstract Air pollution has become a major challenge for the cities of developing countries like India. Industrial growth and development have raised the concentration of air pollutants in the city’s environment. Considering a few variables and limited monitoring sites, there is a lack of understanding of air quality in Indian cities. The present study investigates the spatiotemporal variation in the concentration of air pollutants and their relationship with meteorological parameters over three years in Bengaluru. Hourly data for PM2.5, SO2, NO2, CO, and O3 were collected from 10 continuous ambient air quality monitoring stations. The results show that the concentration of PM2.5 and NO2 exceeds national/international standards. Hot spots were identified with the help of air pollutants distribution maps prepared using the IDW technique. Bivariate polar plots showed that local sources mainly generated air pollution in the city. The contribution of primary air pollutants in forming secondary PM2.5 and O3 have also been studied by finding their characteristic ratios. All five air pollutants have high heterogeneity among 10 stations suggesting high spatial divergence. For PM2.5, the mean COD was noted to be 0.23. The monthly trend for PM2.5, NO2, and CO were similar, but variations were observed in O3 and SO2. All meteorological parameters Except relative humidity exhibit a weak correlation with air pollutants. This study shows that meteorological parameters have a significant role in variations in the concentration of air pollutants. This study can be helpful for the local government to develop mitigation strategies.

Keywords: Air pollution; CAAQMS; Particulate matter; Gaseous pollutant; Bivariate polar plots (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s10668-023-03495-4

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