Increased ozone levels during the COVID-19 lockdown: Analysis for the city of Rio de Janeiro, Brazil

Siciliano, Bruno; Dantas, Guilherme; Silva, Cleyton Martins da; Arbilla, Graciela

doi:10.1016/j.scitotenv.2020.139765

Cited by 159 publications

(183 citation statements)

References 19 publications

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“…Similar to the present study reduction in PM10, PM2.5, NO2, CO and SO2 levels and a significant enhancement in O3 is observed at Iran, China, Kazakhstan, Singapore, Morocco, Brazil, Malaysia and Spain (Table 2) (Broomandi et al, 2020;Chen et al, 2020;Kerimray et al, 2020;Li and Tartarini, 2020;Otmani et al, 2020;Siciliano et al, 2020;Suhaimi et al, 2020;Tobias et al, 2020).…”

Section: Accepted Manuscriptsupporting

confidence: 90%

COVID-19 and Air Pollution in Indian Cities: World’s Most Polluted Cities

Kumari¹,

Lakhani²,

Kumari³

2020

Aerosol Air Qual. Res.

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In the present study, pollutants levels from 24 th March-31 st May in 2020 were compared with the same time period in 2019 to estimate the impact of lockdown on air pollutants levels in 39 different cities of India (including 10 Indian cities considered among the world's 20 most polluted cities). Data for air pollutants was obtained from the Central Pollution Control Board (CPCB) which was statistically analyzed. Tropospheric NO2 column retrieved from Ozone Monitoring Instrument (OMI) were compared between 2019 and 2020 to compare the NO2 levels. Impact of lockdown measures on Ghaziabad which is the world's most polluted city and Patiala which showed maximum reduction during the lockdown period in the present study was studied in detail. After the implementation of lockdown measures, air pollution decreased but with substantial variation among pollutants. The most significant reduction was observed for nitrogen dioxide (NO2) (3-79%) and carbon monoxide (CO) (2-61%), pollutants which are mainly related to traffic emissions. Ozone (O3) showed a mixed trend with increasing levels at some cities which may be attributed to lower titration of O3 by NO. Maximum reduction observed in PM10 and PM2.5 was 58 and 57%, respectively during the lockdown period in 2020 as compared to the previous year. Air quality of the cities also improved in 2020. During the lockdown period in 2020, AQI of only 15% of cities was in the 'Unhealthy' category (151-200) while in 2019, 56% of cities were in the 'Unhealthy' category. In Ghaziabad and Patiala all the pollutants showed significant reduction after lockdown implementation except O3. Diurnal patterns of PM10, PM2.5, CO and NO2 showed lower values during lockdown period in 2020 with less distinct bimodal patterns as compared to 2019. The present study provides evidence that widespread implementation of air pollution measures can result in immediate air quality benefits.

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Section: Accepted Manuscriptsupporting

confidence: 90%

COVID-19 and Air Pollution in Indian Cities: World’s Most Polluted Cities

Kumari¹,

Lakhani²,

Kumari³

2020

Aerosol Air Qual. Res.

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“…Ozone in 2020 was found to have higher values than the historical mean. Similar trends, attributed to a decrease in nitrogen oxide concentration, have been observed in Brazil (Siciliano et al 2020), Barcelona (Tobías et al 2020), and India (Mahato et al 2020;Sharma et al 2020a). The greatest effect of lockdown on air pollution could be observed in NO 2 distribution over Port Harcourt.…”

Section: Resultssupporting

confidence: 74%

Impact of COVID -19 pandemic lockdown on distribution of inorganic pollutants in selected cities of Nigeria

Fuwape

Okpalaonwuka

Ogunjo

2020

Air Qual Atmos Health

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The COVID-19 global pandemic has necessitated some drastic measures to curb its spread. Several countries around the world instituted partial or total lockdown as part of the control measures for the pandemic. This presented a unique opportunity to study air pollution under reduced human activities. In this study, we investigated the impact of the lockdown on air pollution in three highly populated and industrious cities in Nigeria. Compared with historical mean values, NO 2 levels increased marginally by 0.3% and 12% in Lagos and Kaduna respectively. However, the city of Port Harcourt saw a decrease of 1.1% and 215.5% in NO 2 and SO 2 levels respectively. Elevated levels of O 3 were observed during the period of lockdown. Our result suggests that there are other sources of air pollution apart from transportation and industrial sources. Our findings showed that the COVID-19-induced lockdown was responsible for a decrease in NO 2 levels in two of the locations studied. These results presents an opportunity for country wide policies to mitigate the impact of air pollution on the health of citizens.

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“…Similar findings are reported in Thailand ( Stratoulias and Nuthammachot, 2020 ), China and Japan ( Ma and Kang, 2020 ; Zhang et al, 2020 ), Ecuador ( Zalakeviciute et al, 2020 ), Iran ( Broomandi et al, 2020 ), Milan, Italy ( Collivignarelli et al, 2020 ) and Morocco ( Otmani et al, 2020 ). Siciliano et al (2020) and Zhao et al (2020) , in turn, identified noteworthy increases in ozone concentrations (O 3 ) during the measures of social distancing adopted respectively by Brazil and China.…”

Section: Resultsmentioning

confidence: 98%

Analysis of the scientific production of the effect of COVID-19 on the environment: A bibliometric study

Casado‐Aranda

Sánchez‐Fernández

Viedma-del-Jesús

2021

Environmental Research

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The fight against COVID-19 since January 2020 has become the top priority of more than 200 countries. In order to offer solutions to eradicate this global pandemic, the scientific community has published hundreds of articles covering a wide range of areas of knowledge. With the aim of synthesizing these publications, academics are resorting to bibliometric analyses from the perspectives of the disciplines such as biology, medicine, socioeconomics and tourism. Yet no bibliometric analysis has explored the diffuse and little-known growth of COVID-19 scientific publications in the field of environmental studies. The current study is the first of this type to fill this research gap. It has resorted to SciMAT software to evaluate the main topics, authors and journals of publications on the subject of COVID-19 combined with environmental studies spanning the period between 1 December 2019 and 6 September 2020. The search yielded a collection of 440 articles published in scientific journals indexed on by Web of Science and Scopus databases. These publications can be broken down into six main themes: (i) a sharp reduction in air pollution and an improvement of the level of water pollution; (ii) the relationship of wind speed (positive), ultraviolet radiation (positive) and humidity (negative) with the rate of infections; (iii) the effect of the pandemic on the food supply chain and waste habits; (iv) wastewater monitoring offers a great potential as an early warning sign of COVID-19 transmission; (v) artificial intelligence and smart devices can be of great use in monitoring citizen mobilization; and (vi) the lessons gleaned from the pandemic that help define actions to mitigate climate change. The results of the current study therefore offer an agenda for future research and constitute a starting point for academics in the field of environmental studies to evaluate the effects of COVID-19.

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Increased ozone levels during the COVID-19 lockdown: Analysis for the city of Rio de Janeiro, Brazil

Cited by 159 publications

References 19 publications

COVID-19 and Air Pollution in Indian Cities: World’s Most Polluted Cities

COVID-19 and Air Pollution in Indian Cities: World’s Most Polluted Cities

Impact of COVID -19 pandemic lockdown on distribution of inorganic pollutants in selected cities of Nigeria

Analysis of the scientific production of the effect of COVID-19 on the environment: A bibliometric study

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