2021
DOI: 10.1007/s00477-021-02071-4
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Functional ANOVA approaches for detecting changes in air pollution during the COVID-19 pandemic

Abstract: Faced with novel coronavirus outbreak, the most hard-hit countries adopted a lockdown strategy to contrast the spread of virus. Many studies have already documented that the COVID-19 control actions have resulted in improved air quality locally and around the world. Following these lines of research, we focus on air quality changes in the urban territory of Chieti-Pescara (Central Italy), identified as an area of criticality in terms of air pollution. Concentrations of $$\hbox {NO}_{{2}}$$ … Show more

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Cited by 15 publications
(15 citation statements)
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“…The recent studies indicate that NO 2 , PM 10 , PM 2.5 , and benzene in the urban territory of Chieti-Pescara (Central Italy) is changed due to the lock-down with an analysis of variance for functional data (FANOVA) and it is based on the multivariate functional principal component analysis. (Acal 2021 ).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…The recent studies indicate that NO 2 , PM 10 , PM 2.5 , and benzene in the urban territory of Chieti-Pescara (Central Italy) is changed due to the lock-down with an analysis of variance for functional data (FANOVA) and it is based on the multivariate functional principal component analysis. (Acal 2021 ).…”
Section: Discussionmentioning
confidence: 99%
“…data (FANOVA) and it is based on the multivariate functional principal component analysis. (Acal 2021).…”
Section: Supplementary Informationmentioning
confidence: 99%
“…The recent studies indicate that NO2, PM10, PM2.5, and benzene in the urban territory of Chieti-Pescara (Central Italy) is changed due to the lock-down with an analysis of variance for functional data (FANOVA) and it is based on the multivariate functional principal component analysis. [59] The limitation of this research is that the air pollution indices are not adjusted due to the metrological conditions such as temperature, wind, rain, etc. We also show that Precipitation as an important weather condition is not the same among countries and time [60].…”
Section: Discussionmentioning
confidence: 99%
“…Additionally, several authors have also focused their efforts on providing some tools to deal with the multivariate ANOVA problem for functional data (Górecki and Smaga 2017 ; Acal et al. 2021 ).…”
Section: Introductionmentioning
confidence: 99%
“…These statistics were extended by considering the basis expansion of the sample curves with the aim of detecting changes in air pollution during the COVID-19 pandemic in Acal et al. ( 2021 ). In the more general context of testing homogeneity of paired functional data, a Cramér-von-Mises type test statistic is introduced in Ditzhaus and Gaigall ( 2021 ) with application to stock market returns.…”
Section: Introductionmentioning
confidence: 99%