Journal
JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING
Volume 48, Issue 7, Pages 999-1006Publisher
SPRINGER
DOI: 10.1007/s12524-020-01130-7
Keywords
COVID-19; Air pollution; NO2; India; Lockdown
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Air pollution poses a grave health risk and is a matter of concern for researchers around the globe. Toxic pollutants like nitrogen dioxide (NO2) is a result of industrial and transport sector emissions and need to be analysed at the current scenario. After the world realised the effect of COVID-19 pandemic, countries around the globe proposed complete lockdown to contain the spread. The present research focuses on analysing the gaseous pollution scenarios, before and during lockdown through satellite (Sentinel-5P data sets) and ground-based measurements (Central Pollution Control Board's Air Quality Index, AQI) for 8 five-million plus cities in India (Delhi, Ahmedabad, Kolkata, Mumbai, Hyderabad, Chennai, Bengaluru and Pune). The long-term exposure to NO(2)was also linked to pandemic-related mortality cases across the country. An average of 46% reduction in average NO(2)values and 27% improvement in AQI was observed in the eight cities during the first lockdown phase with respect to pre-lockdown phase. Also, 53% of Corona positive cases and 61% of fatality cases were observed in the eight major cities of the country alone, coinciding with locations having high long-term NO(2)exposure.
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