Characterising temporal variability of PM 2.5 /PM 10 ratio and its correlation with meteorological variables at a sub-urban site in the Taj City
Urban Climate, ISSN: 2212-0955, Vol: 53, Page: 101763
2024
- 8Citations
- 32Captures
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Article Description
The problem of air pollution poses a major challenge in the city of Taj, Agra because of rapid urbanization and tourism. Research on PM 2.5 /PM 10 ratio contributes to a deeper understanding of the air pollution scenario and promoting sustainable development. This study was carried out at a suburban site in Agra (Jan 2021-Dec, 2022). We analyzed PM 2.5 /PM 10 ratios, and their correlation with Air Quality Index and meteorological factors using various statistical approaches in the OpenAir package in RStudio. The mean concentrations of PM 2.5 and PM 10 were 46 and 67 μg/m 3, respectively. The PM 2.5 /PM 10 ratio was 0.65, indicating fine particulate dominance. Diurnal, intra-annual, and weekly cycles of PM 2.5, PM 10, and PM 2.5 /PM 10 ratios were examined. PM 2.5 /PM 10 ratio increased with increasing AQI. Correlation analysis revealed, a strong positive correlation ( r = 0.94) between PM 10 and PM 2.5 while the PM 2.5 /PM 10 ratios showed negative association with wind speed (WS), and temperature, and positive association with relative humidity (RH). Higher RH led to higher PM 2.5 /PM 10 ratios indicating worsening of PM 2.5 pollution during winter and post-monsoon. Bivariate polar plots exhibited the lowest PM 2.5 /PM 10 ratios in summer at high WS (>10 m/s) from the west, and the highest PM 2.5 /PM 10 ratios in winter and post-monsoon at low WS (<10 m/s).
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2212095523003577; http://dx.doi.org/10.1016/j.uclim.2023.101763; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85177862786&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2212095523003577; https://dx.doi.org/10.1016/j.uclim.2023.101763
Elsevier BV
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