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Changes in tropospheric ozone concentration over Indo-Gangetic Plains: the role of meteorological parameters

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dc.contributor.authorPayra, Swagata
dc.contributor.authorGupta, Priyanshu
dc.contributor.authorSarkar, Abhijit
dc.contributor.authorBhatla, R.
dc.contributor.authorVerma, Sunita
dc.date.accessioned2025-01-27T09:41:47Z
dc.date.available2025-01-27T09:41:47Z
dc.date.issued2022
dc.description.abstractThis study seeks to understand and quantify the changes in tropospheric ozone (O3) in lower troposphere (LT), middle troposphere (MT) and upper middle troposphere (UMT) over the Indo-Gangetic Plains (IGPs), India during the COVID-19 lockdown 2020 with that of pre-lockdown 2019. The gridded datasets of ozone from the European Centre for Medium-range Weather Forecasts (ECMWF) reanalysis product, ERA5 in combination with statistical interpolated (IDWs) surface NO2 observations, present a consistent picture and indicate a significant tropospheric ozone enhancement over IGP during COVID-19 lockdown restrictions in May 2020. The�Paper also examines the influencing role of meteorological parameters on increasing ozone concentration. Over LT, an increase in O3 concentration (23%) is observed and in MT to UMT an enhancement of about 9�18% in O3 concentration have been seen during May 2020 with respect to May 2019. An investigation on causes�of�increasing ozone concentration (35�85�ppbv) from MT to UMT during May 2020 reveals that there was significant rise (by 1�6%) in low cloud cover (LCC). Notably, higher LCC increases the backscattering of upward solar radiation from the top of the�atmosphere. A positive difference of 5�25�W/m2 in upward solar radiation (USR) is observed across the entire study region. The�result suggests that higher LCC significantly contributed to the enhanced USR. Thereby, resulting in higher photolysis rate�that lead to an increase in mid tropospheric ozone concentration during May 2020. The results highlight the importance of LCC as an�important pathway in ozone formation and aid in scientific understanding of it. � 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.
dc.identifier.doihttps://doi.org/10.1007/s00703-022-00932-3
dc.identifier.issn1777971
dc.identifier.urihttps://dl.bhu.ac.in/ir/handle/123456789/12670
dc.publisherSpringer
dc.titleChanges in tropospheric ozone concentration over Indo-Gangetic Plains: the role of meteorological parameters
dc.typeArticle
dspace.entity.typePublication
journal.titleMeteorology and Atmospheric Physics
journalvolume.identifier.volume134

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