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Assessment of air pollution status during COVID-19 lockdown (March-May 2020) over Bangalore City in India.
Environ Monit Assess. 2021 Jun 08; 193(7):395.EM

Abstract

The coronavirus disease 2019 (COVID-19), which became a global pandemic by March 2020, forced almost all countries over the world to impose the lockdown as a measure of social distancing to control the spread of infection. India also strictly implemented a countrywide lockdown, starting from 24 March to 12 May 2020. This measure resulted in the reduction of the sources of air pollution in general: industrial, commercial, and vehicular pollution in particular, with visible improvement in ambient air quality. In this study, the impact of COVID-19 lockdown on the ambient concentration of air pollutants over the city of Bangalore (India) is assessed using Continuous Ambient Air Quality Measurement (CAAQM) data from 10 monitoring stations spread across the city. The data was obtained from Central Pollution Control Board (CPCB) and Karnataka State Pollution Control Board (KSPCB). The analysis of the relative changes in the ambient concentration of six major air pollutants (NO, NO2, NOX, PM2.5, O3, and SO2) has been carried out for two periods: March-May 2020 (COVID-19 lockdown) and the corresponding period of 2019 during when there was no lockdown. The analysis revealed significant reduction in the concentration of ambient air pollutants at both daily and monthly intervals. This can be attributed to the reduction in sources of emission; vehicular traffic, industrial, and other activities. The average reduction in the concentration of NO, NO2, NOX, PM2.5, and O3 between 01 March and 12 May 2020 was found to be 63%, 48%, 48%, 18%, and 23% respectively when compared to the same period in 2019. Similarly, the comparative analysis of pollutant concentrations between pre-lockdown (01-23 March 2020) and lockdown (24 March-12 May 2020) periods has shown a huge reduction in the ambient concentration of air pollutants, 47.3% (NO), 49% (NO2), 49% (NOX), 10% (SO2), 37.7% (PM2.5), and 15.6% (O3), resulting in improved air quality over Bangalore during the COVID-19 lockdown period. It is shown that the strict lockdown resulted in a significant reduction in the pollution levels. Such lockdowns may be useful as emergency intervention strategies to control air pollution in megacities when ambient air quality deteriorates dangerously.

Authors+Show Affiliations

CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India. kcgouda@csir4pi.in.CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India.CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India.CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India.CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India.Meteorological Centre Bangalore, India Meteorological Department, Bangalore, India.Karnataka State Remote Sensing Application Centre, Bangalore, India.Jain University, Bangalore, India.CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India.Karnataka State Pollution Control Board, Bangalore, India.CSIR Fourth Paradigm Institute, Wind Tunnel Road, Bangalore, India.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

34105059

Citation

Gouda, K C., et al. "Assessment of Air Pollution Status During COVID-19 Lockdown (March-May 2020) Over Bangalore City in India." Environmental Monitoring and Assessment, vol. 193, no. 7, 2021, p. 395.
Gouda KC, Singh P, P N, et al. Assessment of air pollution status during COVID-19 lockdown (March-May 2020) over Bangalore City in India. Environ Monit Assess. 2021;193(7):395.
Gouda, K. C., Singh, P., P, N., Benke, M., Kumari, R., Agnihotri, G., Hungund, K. M., M, C., B, K. R., V, R., & S, H. (2021). Assessment of air pollution status during COVID-19 lockdown (March-May 2020) over Bangalore City in India. Environmental Monitoring and Assessment, 193(7), 395. https://doi.org/10.1007/s10661-021-09177-w
Gouda KC, et al. Assessment of Air Pollution Status During COVID-19 Lockdown (March-May 2020) Over Bangalore City in India. Environ Monit Assess. 2021 Jun 8;193(7):395. PubMed PMID: 34105059.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of air pollution status during COVID-19 lockdown (March-May 2020) over Bangalore City in India. AU - Gouda,K C, AU - Singh,Priya, AU - P,Nikhilasuma, AU - Benke,Mahendra, AU - Kumari,Reshama, AU - Agnihotri,Geeta, AU - Hungund,Kiran M, AU - M,Chandrika, AU - B,Kantha Rao, AU - V,Ramesh, AU - S,Himesh, Y1 - 2021/06/08/ PY - 2021/01/27/received PY - 2021/05/31/accepted PY - 2021/6/9/entrez PY - 2021/6/10/pubmed PY - 2021/6/11/medline KW - Air pollutants KW - COVID-19 pandemic KW - Nitrogen oxides KW - Particulate matter KW - Sulphur dioxide SP - 395 EP - 395 JF - Environmental monitoring and assessment JO - Environ Monit Assess VL - 193 IS - 7 N2 - The coronavirus disease 2019 (COVID-19), which became a global pandemic by March 2020, forced almost all countries over the world to impose the lockdown as a measure of social distancing to control the spread of infection. India also strictly implemented a countrywide lockdown, starting from 24 March to 12 May 2020. This measure resulted in the reduction of the sources of air pollution in general: industrial, commercial, and vehicular pollution in particular, with visible improvement in ambient air quality. In this study, the impact of COVID-19 lockdown on the ambient concentration of air pollutants over the city of Bangalore (India) is assessed using Continuous Ambient Air Quality Measurement (CAAQM) data from 10 monitoring stations spread across the city. The data was obtained from Central Pollution Control Board (CPCB) and Karnataka State Pollution Control Board (KSPCB). The analysis of the relative changes in the ambient concentration of six major air pollutants (NO, NO2, NOX, PM2.5, O3, and SO2) has been carried out for two periods: March-May 2020 (COVID-19 lockdown) and the corresponding period of 2019 during when there was no lockdown. The analysis revealed significant reduction in the concentration of ambient air pollutants at both daily and monthly intervals. This can be attributed to the reduction in sources of emission; vehicular traffic, industrial, and other activities. The average reduction in the concentration of NO, NO2, NOX, PM2.5, and O3 between 01 March and 12 May 2020 was found to be 63%, 48%, 48%, 18%, and 23% respectively when compared to the same period in 2019. Similarly, the comparative analysis of pollutant concentrations between pre-lockdown (01-23 March 2020) and lockdown (24 March-12 May 2020) periods has shown a huge reduction in the ambient concentration of air pollutants, 47.3% (NO), 49% (NO2), 49% (NOX), 10% (SO2), 37.7% (PM2.5), and 15.6% (O3), resulting in improved air quality over Bangalore during the COVID-19 lockdown period. It is shown that the strict lockdown resulted in a significant reduction in the pollution levels. Such lockdowns may be useful as emergency intervention strategies to control air pollution in megacities when ambient air quality deteriorates dangerously. SN - 1573-2959 UR - https://www.unboundmedicine.com/medline/citation/34105059/Assessment_of_air_pollution_status_during_COVID_19_lockdown__March_May_2020__over_Bangalore_City_in_India_ L2 - https://doi.org/10.1007/s10661-021-09177-w DB - PRIME DP - Unbound Medicine ER -