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

Saginela Ravindra Babu This email address is being protected from spambots. You need JavaScript enabled to view it.1, N. Narasimha Rao2, S. Vijaya Kumar3, Surender Paul4, Shantanu Kumar Pani This email address is being protected from spambots. You need JavaScript enabled to view it.5

1 Center for Space and Remote Sensing Research, National Central University, Taoyuan 32001, Taiwan
2 Department of Geophysics, Banaras Hindu University, Varanasi 221005, India
3 Department of Information Technology, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal 518501, India
4 Meteorological Centre, India Meteorological Department, Chandigarh 160037, India
5 Department of Atmospheric Sciences, National Central University, Taoyuan 32001, Taiwan


Received: June 14, 2020
Revised: August 5, 2020
Accepted: August 7, 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.2020.06.0314  

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Cite this article:

Babu, S.R., Rao, N.N., Kumar, S.V., Paul, S. and Pani, S.K. (2020). Plausible Role of Environmental Factors on COVID-19 Transmission in the Megacity Delhi, India. Aerosol Air Qual. Res. 20: 2075–2084. https://doi.org/10.4209/aaqr.2020.06.0314


  • The study examines the impact of weather conditions on COVID-19 pandemic in Delhi.
  • Temperature and wind speed shows positive and significant associations.
  • RH negatively correlates with daily COVID-19 cases.
  • O3 shows positive association with COVID-19 daily cases.


The role of environmental factors in the transmission of COVID-19 still needs to be determined. The main objective of the present study is to explore the relationship between environmental factors (both meteorological and air pollution parameters) and the daily confirmed COVID-19 cases over Delhi, India. This study employed a secondary data analysis of COVID-19 (from 1 March to 30 June, 2020) from the Delhi State Health Bulletin and the environmental factors from the Indian Meteorological Department (IMD) and Central Pollution Control Board (CPCB) of India. Pearson's correlation coefficients were assessed to show the correlation between environmental factors and daily confirmed COVID-19 cases. The temperature (maximum, minimum, average, and dew point) and wind speed exhibited a significant positive correlation with daily COVID-19 cases. However, diurnal temperature range, rainfall, and relative humidity showed non-significant correlations. Air pollutants were found to be weakly associated with daily COVID-19 cases. However, O3 exhibited a significant positive correlation with daily COVID-19 cases in Delhi. The probability distribution analysis reveals that approximately 80% of the total confirmed cases were registered when the average temperature was higher than 30°C. The present study finds a prominent relationship between different environmental factors and COVID-19 transmission in Delhi. However, further detailed analysis over different parts of entire India is required to get a complete picture and solid conclusion.

Keywords: COVID-19; Temperature; Humidity; AQI; Delhi.


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Aerosol Air Qual. Res. 20 :2075 -2084 . https://doi.org/10.4209/aaqr.2020.06.0314  

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