The impact of improved air-quality due to COVID-19 lockdown on surface meteorological parameters and planetary boundary layer over Gadanki, a tropical rural site in India

Kumar, Sarvan; Rao, T. Narayana

doi:10.1016/j.atmosres.2021.105738

Cited by 2 publications

(3 citation statements)

References 41 publications

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“…Even though there was no national lockdown, vehicular traffic had reduced drastically during the second wave of COVID-19 in May 2021. Similar observations of shallow boundary layers influenced by rain events have been reported from the southern part of the country (Satheesh Kumar & Narayana Rao, 2021 ). Alvarado et al ( 2021 ) also observed reduced BLH during their lockdown period in Colombia.…”

Section: Resultssupporting

confidence: 85%

“…Jain et al ( 2021 ) reported a decline in trace gases and particulate matter over Gadanki, a tropical rural setting in southern India. Satheesh Kumar and Narayana Rao ( 2021 ) reported similar improved air quality conditions during the lockdown over Gadanki. Suman et al ( 2021 ) credited the COVID-19 lockdown for the purification of the atmosphere over the metropolitan cities of Delhi, Kolkata, Mumbai and Chennai.…”

Section: Introductionmentioning

confidence: 83%

“…Miech et al ( 2021 ) monitored the planetary boundary layer (PBL) over Phoenix, Arizona, during their lockdown episode to study the air quality. Satheesh Kumar and Narayana Rao ( 2021 ) reported shallow PBLs using ground-based sensors over a rural site in southern India. Jain et al ( 2021 ) used ERA5 reanalysis to show a reduction in the boundary layer over southern India in 2020.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Boundary Layer Over Ahmedabad, Western Indian Region: Impact of COVID-19 Nationwide Lockdown

Saha

Sharma

Chhabra

et al. 2023

Pure Appl. Geophys.

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The government of India imposed a nationwide lockdown to tackle the outbreak of COVID-19 in 2020. This period witnessed record low anthropogenic activity, which had severe socio-economic impacts but also had orthogonal effects on the ambient air quality of the atmosphere. This study focuses on the variations in the atmospheric boundary layer (ABL) over a western Indian urban region in the light of COVID-19. Continuous backscatter recorded by a ceilometer, stationed at Ahmedabad, was used in this study to monitor the ABL during the national lockdown (NLD) in 2020 and state restrictions in 2021, and compared with the control year of 2019. In parallel, improvement in air quality during the NLD was observed by the SAFAR air quality station at Ahmedabad, with decreased particulate matter concentrations. The ground-based observations were substantiated by the ERA5 reanalysis dataset. A decline in the ABL height was recorded during the NLD, which showed improvement in 2021 but which was shy of the ABL in 2019. This was correlated with rain events during the observational period, recorded by an automatic weather station.

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Section: Resultssupporting

confidence: 85%