Special Issue on COVID-19 Aerosol Drivers, Impacts and Mitigation (VI)

Jasbir Singh Bedi This email address is being protected from spambots. You need JavaScript enabled to view it., Pankaj Dhaka, Deepthi Vijay, Rabinder Singh Aulakh, Jatinder Paul Singh Gill

School of Public Health and Zoonoses, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana 141004, India


 

 

Received: May 9, 2020
Revised: July 4, 2020
Accepted: August 12, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2020.05.0209  


Cite this article:

Bedi, J.S., Dhaka, P., Vijay, D., Aulakh, R.S and Gill, J.P.S. (2020). Assessment of Air Quality Changes in the Four Metropolitan Cities of India during COVID-19 Pandemic Lockdown. Aerosol Air Qual. Res. 20: 2062–2070. https://doi.org/10.4209/aaqr.2020.05.0209


HIGHLIGHTS

  • COVID-19 lockdown reduced air pollutants in Delhi, Mumbai, Kolkata and Chennai.
  • Nearly 50% decrease in NO2, PM10 and PM2.5 concentrations was observed.
  • Significant (p < 0.05) increase in O3 levels observed in Delhi during lockdown.
 

ABSTRACT


In view of emerging threat of COVID-19 pandemic, stringent lockdown measures have been implemented in India since 25th March, 2020. The present study aims to assess the changes in air quality before and during lockdown in the four major metropolitan cities of India viz., Delhi, Mumbai, Kolkata and Chennai. The data on major air quality parameters and meteorological parameters was collected for 15 days before lockdown (i.e., March 10th–March 24th, 2020) and 15 days after implementation of lockdown (25th March–April 8th, 2020). The lockdown measures reflected a significant reduction in air pollutants, most significant fall was estimated for NO2 (29.3–74.4%) while the least reduction was noticed for SO2. On the contrary, levels of ground level ozone were found to be increased (except in Mumbai), could be related to the lower utilization of O3 owing to decrease of NOx in the environment. Since, the lockdown period has been extended, therefore further reduction of most pollutants is expected. Among the various metrological parameters, significant increase in diurnal temperature was observed at Delhi, Kolkata and Mumbai, however relative humidity has changed significantly only in Mumbai. In the absence of any major violent meteorological phenomena in India during recent months the significant difference in air quality parameters could be majorly attributed to the effect of lockdown measures. However, the regional differences may be because of the local emission of pollutants and the prevailing effects of secondary pollutants. These observations highlight the contribution of anthropogenic sources in air pollution, therefore, sustainable polices for mitigation of air pollution are essential in India.


Keywords: Air Pollution; Air Quality; COVID-19; India; Lockdown; Metropolitan cities.



REFERENCES


  1. Balakrishnan, K., Dey, S., Gupta, T., Dhaliwal, R.S., Brauer, M., Cohen, A.J., Stanaway, J.D., Beig, G., Joshi, T.K., Aggarwal, A.N. and Sabde, Y. (2019). The impact of air pollution on deaths, disease burden, and life expectancy across the states of India: The Global Burden of Disease Study 2017. Lancet Planet. Health 3: e26–e39. [Publisher Site]

  2. Barzeghar, V., Sarbakhsh, P., Hassanvand, M.S., Faridi, S. and Gholampour, A. (2020). Long-term trend of ambient air PM10, PM2.5, and O3 and their health effects in Tabriz city, Iran, during 2006–2017. Sustainable Cities Soc. 54: 101988. [Publisher Site]

  3. CensusInfo India (2011). [Website Link]

  4. Centre for Research on Energy and Clean Air (CREA) (2020). 11,000 air pollution-related deaths avoided in Europe as coal, oil consumption plummet[Website Link]

  5. Chakraborty, P. (2018, December 12). Kolkata’s polluted air. The Statesman. [Website Link]

  6. Chen, Q.X., Huang, C.L., Yuan, Y. and Tan, H.P. (2020). Influence of COVID-19 event on air quality and their association in mainland China. Aerosol Air Qual. Res. 20: 1541–1551. [Publisher Site]

  7. Collivignarelli, M.C., Abbà, A., Bertanza, G., Pedrazzani, R., Ricciardi, P. and Miino, M.C. (2020). Lockdown for CoViD-2019 in Milan: What are the effects on air quality? Sci. Total Environ. 732: 139280. [Publisher Site]

  8. Dang, R. and Liao, H. (2019). Radiative forcing and health impact of aerosols and ozone in China as the consequence of clean air actions over 2012–2017. Geophys. Res. Lett. 46: 12511–12519. [Publisher Site]

  9. Dantas, G., Siciliano, B., França, B.B., da Silva, C.M. and Arbilla, G. (2020). The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil. Sci. Total Environ. 729: 139085. [Publisher Site]

  10. Elperin, T., Fominykh, A., Krasovitov, B. and Vikhansky, A. (2011). Effect of rain scavenging on altitudinal distribution of soluble gaseous pollutants in the atmosphere. Atmos. Environ. 45: 2427–2433. [Publisher Site]

  11. Faridi, S., Yousefian, F., Niazi, S., Ghalhari, M.R., Hassanvand, M.S. and Naddafi. K. (2020). Impact of SARS-CoV-2 on ambient air particulate matter in Tehran. Aerosol Air Qual. Res. 20: 1805–1811. [Publisher Site]

  12. Fortelli, A., Scafetta, N. and Mazzarella, A. (2016). Influence of synoptic and local atmospheric patterns on PM10 air pollution levels: A model application to Naples (Italy). Atmos. Environ. 143: 218–228. [Publisher Site]

  13. Gorai, A.K., Tchounwou, P.B. and Mitra, G. (2017). Spatial variation of ground level ozone concentrations and its health impacts in an urban area in India. Aerosol Air Qual. Res. 17: 951–964. [Publisher Site]

  14. Gordon, T., Balakrishnan, K., Dey, S., Rajagopalan, S., Thornburg, J., Thurston, G., Agrawal, A., Collman, G., Guleria, R., Limaye, S. and Salvi, S. (2018). Air pollution health research priorities for India: Perspectives of the Indo-US Communities of Researchers. Environ. Int. 119: 100–108. [Publisher Site]

  15. Guo, L.C., Zhang, Y., Lin, H., Zeng, W., Liu, T., Xiao, J., Rutherford, S., You, J. and Ma, W. (2016). The washout effects of rainfall on atmospheric particulate pollution in two Chinese cities. Environ. Pollut. 215: 195–202. [Publisher Site]

  16. Guttikunda, S.K., Nishadh, K.A. and Jawahar, P. (2019). Air pollution knowledge assessments (APnA) for 20 Indian cities. Urban Clim. 27:1 24–141. [Publisher Site]

  17. Hanaoka, T. and Masui, T. (2020). Exploring effective short-lived climate pollutant mitigation scenarios by considering synergies and trade-offs of combinations of air pollutant measures and low carbon measures towards the level of the 2°C target in Asia. Environ. Pollut. 261: 113650. [Publisher Site]

  18. He, Z.R., Wang, X.M., Ling, Z.H., Zhao, J., Guo, H., Shao, M. and Wang, Z. (2019). Contributions of different anthropogenic volatile organic compound sources to ozone formation at a receptor site in the Pearl River Delta region and its policy implications. Atmos. Chem. Phys. 19: 8801–8816. [Publisher Site]

  19. IQAir (2019). World's most polluted cities 2019 (PM2.5), Norway. [Website Link]

  20. Jain, S. and Sharma, T. (2020). Social and travel lockdown impact considering coronavirus disease (COVID-19) on air quality in megacities of India: Present benefits, future challenges and way forward. Aerosol Air Qual. Res. 20: 1222–1236. [Publisher Site]

  21. Jones, A.M. and Harrison, R.M. (2011). Temporal trends in sulphate concentrations at European sites and relationships to sulphur dioxide. Atmos. Environ. 45:873–882. [Publisher Site]

  22. Kean, A.J., Harley, R.A., Littlejohn, D. and Kendall, G.R. (2000). On-road measurement of ammonia and other motor vehicle exhaust emissions. Environ. Sci. Technol. 34: 3535–3539. [Publisher Site]

  23. Koshy, J. (2020, April 11). Coronavirus- Without lockdown, India would have seen over 8 lakh cases by April 15, says Health Ministry. The Hindu. [Website Link]

  24. Kumari, P. and Toshniwal, D. (2020). Impact of lockdown measures during COVID-19 on air quality–A case study of India. Int. J. Environ. Health Res. [Publisher Site]

  25. Li, K., Jacob, D.J., Liao, H., Shen, L., Zhang, Q. and Bates, K.H. (2019). Anthropogenic drivers of 2013–2017 trends in summer surface ozone in China. PNAS 116: 422–427. [Publisher Site]

  26. Livemint (2019). Why is Delhi’s air so toxic? [Website Link]

  27. Mahato, S., Pal, S. and Ghosh, K.G. (2020). Effect of lockdown amid COVID-19 pandemic on air quality of the megacity Delhi, India. Sci. Total Environ. 730: 139086. [Publisher Site]

  28. Manisalidis, I., Stavropoulou, E., Stavropoulos, A. and Bezirtzoglou, E. (2020). Environmental and health impacts of air pollution: A review. Front. Public Health 8: 14. [Publisher Site]

  29. Mannucci, P.M. and Franchini, M. (2017). Health effects of ambient air pollution in developing countries. Int. J. Environ. Res. Public Health. 14: 1048. [Publisher Site]

  30. Marlier, M.E., Jina, A.S., Kinney, P.L. and DeFries, R.S. (2016). Extreme air pollution in global megacities. Curr. Clim. Change Rep. 2: 15–27. [Publisher Site]

  31. Martelletti, L. and Martelletti, P. (2020). Air pollution and the novel Covid-19 disease: A putative disease risk factor. SN Compr. Clin. Med. 2: 383–387. [Publisher Site]

  32. Monks, P.S., Archibald, A.T., Colette, A., Cooper, O., Coyle, M., Derwent, R., Fowler, D., Granier, C., Law, K.S., Mills, G.E. and Stevenson, D.S. (2015). Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer. Atmos. Chem. Phys. 15: 8889–8973. [Publisher Site]

  33. Muhammad, S., Long, X. and Salman, M. (2020). COVID-19 pandemic and environmental pollution: A blessing in disguise? Sci. Total Environ. 728: 138820. [Publisher Site]

  34. Myllyvirta, L. (2020, February 19). Analysis: Coronavirus temporarily reduced China’s CO2 emissions by a quarter. Carbon Brief. Website Link]

  35. National Aeronautics and Space Administration (NASA) (2020). [Website Link]

  36. Pawlak, I. and Jarosławski, J. (2015). The influence of selected meteorological parameters on the concentration of surface ozone in the central region of Poland. Atmos. Ocean 53: 126–139. [Publisher Site]

  37. Pyrgou, A., Hadjinicolaou, P. and Santamouris, M. (2018). Enhanced near-surface ozone under heatwave conditions in a Mediterranean island. Sci. Rep. 8: 9191. [Publisher Site]

  38. Radaideh, A.J. (2017). Effect of meteorological variables on air pollutants variation in arid climates. J. Environ. Anal. Toxicol. 7: 2161–0525. [Publisher Site]

  39. Ray, D., Salvatore, M., Bhattacharyya, R., Wang, L., Mohammed, S., Purkayastha, S., Halder, A., Rix, A., Barker, D., Kleinsasser, M. and Zhou, Y. (2020). Predictions, role of interventions and effects of a historic national lockdown in India's response to the COVID-19 pandemic: Data science call to arms. medRxiv 2020.04.15.20067256. [Publisher Site]

  40. Sergeant, E.S.G. (2018). Epitools epidemiology calculator. Ausvet. [Website Link]

  41. Setti, L., Passarini, F., De Gennaro, G., Barbieri, P., Perrone, M.G., Piazzalunga, A., Borelli, M., Palmisani, J., Di Gilio, A., Piscitelli, P. and Miani, A. (2020). The Potential role of Particulate Matter in the Spreading of COVID-19 in Northern Italy: First Evidence-based Research Hypotheses. medRxiv 2020.04.11.20061713. [Publisher Site]

  42. Sharma, S.K. and Mandal, T.K. (2017). Chemical composition of fine mode particulate matter (PM2.5) in an urban area of Delhi, India and its source apportionment. Urban Clim. 21: 106–122. [Publisher Site]

  43. Sharma, S., Zhang, M., Gao, J., Zhang, H. and Kota, S.H. (2020). Effect of restricted emissions during COVID-19 on air quality in India. Sci. Total Environ. 728: 138878. [Publisher Site]

  44. Sicard, P., De Marco, A., Agathokleous, E., Feng, Z., Xu, X., Paoletti, E., Rodriguez, J.J.D. and Calatayud, V. (2020). Amplified ozone pollution in cities during the COVID-19 lockdown. Sci. Total Environ. 735: 139542. [Publisher Site]

  45. Skymet Weather Team (2020, April). Weather highlights of March 2020: India rain surplus by 47% in March. [Website Link]

  46. Tasić, V., Kovačević, R. and Milošević, N. (2013). Investigating the impacts of winds on SO2 concentrations in Bor, Serbia. J. Sustainable Dev. Energy Water Environ. 1: 141–151. [Publisher Site]

  47. The Asian Age (2019, August 20). Maharashtra has most hotspots of SO2: Greenpeace. [Website Link]

  48. Tobías, A., Carnerero, C., Reche, C., Massagué, J., Via, M., Minguillón, M.C., Alastuey, A. and Querol, X. (2020). Changes in air quality during the lockdown in Barcelona (Spain) one month into the SARS-CoV-2 epidemic. Sci. Total Environ. 726: 138540. [Publisher Site]

  49. Urban Emissions (2019). City – Mumbai (Maharashtra, India). [Website Link]

  50. Veefkind, J.P., Aben, I., McMullan, K., Förster, H., De Vries, J., Otter, G., Claas, J., Eskes, H.J., De Haan, J.F., Kleipool, Q. and Van Weele, M. (2012). TROPOMI on the ESA Sentinel-5 Precursor: A GMES mission for global observations of the atmospheric composition for climate, air quality and ozone layer applications. Remote Sens. Environ. 120: 70–83. [Publisher Site]

  51. Wang, Q.G., Han, Z.W. and Higano, Y. (2005) An inventory of nitric oxide emissions from soils in China. Environ. Pollut. 135: 83–90. [Publisher Site]

  52. Wise, E.K. and Comrie, A.C. (2005). Meteorologically adjusted urban air quality trends in the Southwestern United States. Atmos. Environ. 39: 2969–2980. [Publisher Site]

  53. World Health Organization (WHO) (2018). Ambient (outdoor) air pollution. [Website Link]

  54. World Health Organization (WHO) (2020a). Air pollution: Health impacts. [Website Link]

  55. World Health Organization (WHO) (‎2020b)‎. Coronavirus disease 2019 (‎‎COVID-19)‎‎: Situation report, 107. World Health Organization. [Publisher Site]

  56. Wu, X., Nethery, R.C., Sabath, B.M., Braun, D. and Dominici, F. (2020). Exposure to air pollution and COVID-19 mortality in the United States. medRxiv 2020.04.05.20054502. [Publisher Site]

  57. Xu, K., Cui, K., Young, L.H., Wang, Y.F., Hsieh, Y.K., Wan, S. and Zhang, J. (2020). Air quality index, indicatory air pollutants and impact of COVID-19 event on the air quality near central China. Aerosol Air Qual. Res. 20: 1204–1221. [Publisher Site]

  58. Xu, Y., Xue, W., Lei, Y., Zhao, Y., Cheng, S., Ren, Z. and Huang, Q. (2018). Impact of meteorological conditions on PM2.5 Pollution in China during winter. Atmosphere 9: 429. [Publisher Site]

Aerosol Air Qual. Res. 20 :2062 -2070 . https://doi.org/10.4209/aaqr.2020.05.0209  


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