4.7 Article

Heterogeneous impacts of mobility restrictions on air quality in the State of Sao Paulo during the COVID-19 pandemic

期刊

ENVIRONMENTAL POLLUTION
卷 300, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2022.118984

关键词

Air quality; Mobility restrictions; COVID-19; Air pollution; Social isolation

资金

  1. Sao Paulo Research Foundation - FAPESP [2018/09011-9]
  2. Laboratory for Process Engineering, Environ-ment, Biotechnology and Energy - LEPABE - FCT/MCTES (PIDDAC) [UID/EQU/00511/2020]
  3. FEDER funds through COMPETE2020 - Programa Oper-acional Competitividade e Internacionalizacao (POCI) [PTDC/EAM-AMB/32391/2017]
  4. national funds (PIDDAC) through FCT/MCTES
  5. Sao Paulo Research Foundation [2019/04564-2, 2017/06670-9]
  6. Portuguese Foundation for Science and Technology (FCT) [CEECIND/02477/2017]
  7. National Council for Scientific and Technological Development-CNPQ [07/2020, 402110/2020-0]
  8. Fundação para a Ciência e a Tecnologia [PTDC/EAM-AMB/32391/2017] Funding Source: FCT

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The study evaluated air quality in the State of Sao Paulo during the COVID-19 pandemic and investigated the relationship between population isolation and pollutant concentrations. While certain pollutants showed significant reductions, the economic and climatic characteristics of each region played a decisive role in the behavior of other pollutants. The lack of data and variable compliance with measurements were limitations, but the study highlighted the opportunity to assess air quality and design future policies.
Air quality in the State of Sao Paulo was evaluated during the first general State plan of mobility restrictions due to the COVID-19 pandemic (24th March to May 31, 2020). Nitrogen dioxide (NO2), ozone (O-3), particulate matter PM10 and PM2.5 and sulphur dioxide (SO2) concentrations were assessed in cities of the Sao Paulo State with a monitoring station and compared to historical data. Linear regression models were built to investigate the relationship between the isolation of the population - determined using mobile phone monitoring data - and the concentration of each pollutant during the studied period. Although the reduction of pollutants such as NO2, SO2 and PM2.5 is very clear, the economic and climatic characteristics of each region were decisive in the general behaviour of O-3 and PM10. It was not possible to establish a correlation between the pollutants and the isolation index, partly due to the lack of data, partly due to the compliance of the population to those measurements, which was variable over time. Another important limitation factor was the absence of data related to the pollutants of interest in many of the stations. However, the isolation measures carried out in the State opened the opportunity to individually assess the air quality measurements in each of the stations, enabling an understanding that will allow in the future the design of air quality policies together with local sanitary policies.

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