Exploring the Interruption-Recovery Pattern of Air Pollutants During the COVID-19 Pandemic in Southern Brazil: An Analysis of the New Normal

IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION
MAPAN Pub Date : 2023-09-01 DOI:10.1007/s12647-023-00681-7
Ronan Adler Tavella, Flavio Manoel Rodrigues da Silva Júnior
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Abstract

This study investigated the interruption-recovery pattern of air pollutants (O3, PM2.5 and PM10) during and after the COVID-19 pandemic in Southern Brazil using machine learning models. The results showed that 2020 was an atypical year for air pollution levels due to restriction measures. However, we also found that 2021 was not a definitive year for the assessed air pollutants in the region but rather a transitional year. It was only in 2022 that the pollutant levels returned to usual levels in the region. In this sense, our findings suggest that the levels observed in 2022 can be considered the "new normal" for air pollutants in the region. Furthermore, we found that O3 levels decreased significantly and were sustained and further decreased in 2022, while PM2.5 and PM10 levels showed a reversed but similar trend with a slight increase in concentrations from 2020 to 2021 and again from 2021 to 2022. Overall, this study provides valuable insights into the impacts of COVID-19 on air pollution levels and highlights the need for continued efforts to improve air quality in the region.

Abstract Image

探讨新冠肺炎大流行期间巴西南部空气污染物的中断-恢复模式:新常态分析
本研究利用机器学习模型调查了 COVID-19 大流行期间和之后巴西南部空气污染物(O3、PM2.5 和 PM10)的中断-恢复模式。结果表明,由于采取了限制措施,2020 年是空气污染水平非典型的一年。不过,我们也发现,2021 年并非该地区空气污染物评估的确定年份,而是一个过渡年份。直到 2022 年,该地区的污染物水平才恢复到正常水平。从这个意义上说,我们的研究结果表明,2022 年观测到的污染物水平可被视为该地区空气污染物的 "新常态"。此外,我们还发现 O3 水平在 2022 年显著下降,并持续进一步下降,而 PM2.5 和 PM10 水平则呈现出相反但相似的趋势,即 2020 年至 2021 年浓度略有上升,2021 年至 2022 年浓度再次上升。总之,这项研究为了解 COVID-19 对空气污染水平的影响提供了宝贵的见解,并强调了继续努力改善该地区空气质量的必要性。
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来源期刊
MAPAN
MAPAN 工程技术-物理:应用
CiteScore
2.30
自引率
20.00%
发文量
91
审稿时长
3 months
期刊介绍: MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology. The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.
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