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eISSN: 2581-9615 || CODEN: WJARAI || Impact Factor 8.2 ||  CrossRef DOI

Research and review articles are invited for publication in March 2026 (Volume 29, Issue 3) Submit manuscript

An assessment of air quality indicators Sentinel-5P TROPOMI data were used to examine the NO2 SO2 O3 AEROSOL levels in Uttar Pradesh before, after, and during the COVID 19 phase

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  • An assessment of air quality indicators Sentinel-5P TROPOMI data were used to examine the NO2 SO2 O3 AEROSOL levels in Uttar Pradesh before, after, and during the COVID 19 phase

Alka Chandra * and Saumya Singh

Department of Civil Engineering, Institute of Engineering and Technology Lucknow, Uttar Pradesh, -226021, India.
 
Research Article
World Journal of Advanced Research and Reviews, 2023, 20(01), 324-336
Article DOI: 10.30574/wjarr.2023.20.1.2021
DOI url: https://doi.org/10.30574/wjarr.2023.20.1.2021
 
Received on 20 August 2023; revised on 03 October 2023; accepted on 06 October 2023
 
Significantly affecting human activities and economic sectors were the COVID-19 pandemic and related lockdowns. Nevertheless, despite these difficulties, the environment saw some improvement, especially in terms of the air quality. A dearth of thorough research comparing air quality indicators before, during, and after the epidemic has been noted despite the many studies that have emphasized the decrease in pollutants across India during the early phases of the pandemic. In-depth analyses of four important air quality indicators nitrogen dioxide (NO2), sulphur dioxide (SO2), ultraviolet aerosol index (UVAI) and ozone (O2) are conducted in this work. We examined the patterns on the Google Earth Engine (GEE) platform, specifically for the state of Uttar Pradesh in India, utilizing data from the TROPOMI (Tropospheric Monitoring Instrument) during a five-year period, focusing on the same three-month timeline each year. For several atmospheric variables (NO2,SO2,O2, Aerosol,), the given data from 2019 to 2023 includes monthly averages and standard deviations. The overall trend from 2019 to 2023 shows varying quantities of pollutants, with some, like NO2, rebounding after an initial decrease and others, like aerosols, exhibiting considerable annual changes, underscoring the dynamic character of environmental circumstances over time.
 
Sentinel-5p; Google Earth Engine (GEE); European Space Agency (ESA); COVID-19; TROPOMI (Tropospheric Monitoring Instrument); Uttar Pradesh
 
https://wjarr.com/sites/default/files/fulltext_pdf/WJARR-2023-2021.pdf

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Alka Chandra and Saumya Singh. An assessment of air quality indicators Sentinel-5P TROPOMI data were used to examine the NO2 SO2 O3 AEROSOL levels in Uttar Pradesh before, after, and during the COVID 19 phase. World Journal of Advanced Research and Reviews, 2023, 20(1), 324-336. Article DOI: https://doi.org/10.30574/wjarr.2023.20.1.2021

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