Improved air quality and associated mortalities in India under COVID-19 lockdown.

ABSTRACT: India enforced stringent lockdown measures on March 24, 2020 to mitigate the spread of the Severe Acute Respiratory Syndrome Coronovirus-2 (SARS-CoV-2). Here, we examined the impact of lockdown on the air quality index (AQI) [including ambient particulate matter (PM₁₀ and PM_2.5), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), carbon monoxide (CO), ozone (O₃), and ammonia (NH₃)] and tropospheric NO₂ and O₃ densities through Sentinel-5 satellite data approximately 1 d post-lockdown and one month pre-lockdown and post-lockdown. Our findings revealed a marked reduction in the ambient AQI (estimated mean reduction of 17.75% and 20.70%, respectively), tropospheric NO₂ density, and land surface tempe

SUBMITTER: Naqvi HR 

PROVIDER: S-EPMC7590817 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature