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Spatial-Temporal Variability and Characterisation of Aerosols in Urban Air Quality of Ahmedabad, India, based on Field and Satellite Data
Authors: Rajesh Iyer, Abha Chhabra, Prakash Chauhan, Tejas Turakhia, Mohit Porwal, Divya Patel
Number of views: 566
Particulate matter (PM), or aerosol play an important role in Air Quality. Ahmedabad is an urban, industrialized and one of the fastest growing city in Western India. This study presents spatio-temporal variability in mass concentrations of different Particulate Matter as well as their characteristics during different seasons based on field measurements in different micro urban environments of Ahmedabad. The meteorological parameters such as wind speed, temperature, relative humidity and atmospheric pressure played a very important role in the seasonal variation of the PM concentrations. The PM10, PM2.5 and PM1 were found to be highest with 229.4 μg/m3, 82.20 μg/m3 and 53.53 μg/m3, respectively in winter season. These PM concentrations are higher than the National Ambient Air Quality Standard (NAAQS) for PM10 and PM2.5. The aerosol characteristic based on field measurement of spectral Aerosol Optical Depth indicates significant contribution by coarser mode particles. The Inhalable, Thoracic and Alveolic PM concentrations which are significant for human health impacts of ambient air quality were observed in the increasing order of monsoon