IIA Institutional Repository

Silver linings in the dark clouds of COVID-19: Improvement of air quality over India and Delhi metropolitan area from measurements and WRF-CHIMERE model simulations

Show simple item record

dc.contributor.author Dumka, U. C
dc.contributor.author Kaskaoutis, D. G
dc.contributor.author Verma, Shubha
dc.contributor.author Shantikumar, N. S
dc.contributor.author Sarvan Kumar
dc.contributor.author Ghosh, Sanhita
dc.date.accessioned 2021-03-07T06:25:25Z
dc.date.available 2021-03-07T06:25:25Z
dc.date.issued 2021-02
dc.identifier.citation Atmospheric Pollution Research, Vol. 12, No. 2, pp. 225-242 en_US
dc.identifier.issn 1309-1042
dc.identifier.uri http://hdl.handle.net/2248/7685
dc.description Restricted Access © Elsevier B.V. https://doi.org/10.1016/j.apr.2020.11.005 en_US
dc.description.abstract The current study examines the impact of the COVID-19 lockdown (25th March until May 17, 2020) period in particulate matter (PM) concentrations and air pollutants (NOx, SO2, CO, NH3, and O3) at 63 stations located at Delhi, Uttar Pradesh and Haryana states within the Delhi-NCR, India. Large average reductions are recorded between the stations in each state such as PM10 (−46 to −58%), PM2.5 (−49 to −55%), NO2 (−27 to −58%), NO (−54% to −59%), CO (−4 to −44%), NH3 (−2 to −38%), while a slight increase is observed for O3 (+4 to +6%) during the lockdown period compared to same periods in previous years. Furthermore, PM and air pollutants are significantly reduced during lockdown compared to the respective period in previous years, while a significant increase in pollution levels is observed after the re-opening of economy. The meteorological changes were rather marginal between the examined periods in order to justify such large reductions in pollution levels, which are mostly attributed to traffic-related pollutants (NOx, CO and road-dust PM). The WRF-CHIMERE model simulations reveal a remarkable reduction in PM2.5, NO2 and SO2 levels over whole Indian subcontinent and mostly over urban areas, due to limitation in emissions from the traffic and industrial sectors. A PM2.5 reduction of −48% was simulated in Delhi in great consistency with measurements, rendering the model as a powerful tool for simulations of lower pollution levels during lockdown period. en_US
dc.language.iso en en_US
dc.publisher Elsevier B.V. en_US
dc.subject COVID-19 en_US
dc.subject Air pollutants en_US
dc.subject Aerosols en_US
dc.subject Ground measurements en_US
dc.subject Remote sensing en_US
dc.title Silver linings in the dark clouds of COVID-19: Improvement of air quality over India and Delhi metropolitan area from measurements and WRF-CHIMERE model simulations en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account