Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer

Abstract The Sao Paulo Metropolitan Area is a unique case worldwide due to the extensive use of biofuel, particularly ethanol, by its large fleet of nearly 8 million cars. Based on source apportionment analysis of Organic Aerosols in downtown Sao Paulo, and using ethanol as tracer of passenger vehic...

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Autores principales:	Joel Brito, Samara Carbone, Djacinto A. Monteiro dos Santos, Pamela Dominutti, Nilmara de Oliveira Alves, Luciana V. Rizzo, Paulo Artaxo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3b054c80042a43228f374ba16ecd198a
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spelling	oai:doaj.org-article:3b054c80042a43228f374ba16ecd198a2021-12-02T12:32:22ZDisentangling vehicular emission impact on urban air pollution using ethanol as a tracer10.1038/s41598-018-29138-72045-2322https://doaj.org/article/3b054c80042a43228f374ba16ecd198a2018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-29138-7https://doaj.org/toc/2045-2322Abstract The Sao Paulo Metropolitan Area is a unique case worldwide due to the extensive use of biofuel, particularly ethanol, by its large fleet of nearly 8 million cars. Based on source apportionment analysis of Organic Aerosols in downtown Sao Paulo, and using ethanol as tracer of passenger vehicles, we have identified primary emissions from light-duty-vehicles (LDV) and heavy-duty-vehicles (HDV), as well as secondary process component. Each of those factors mirror a relevant primary source or secondary process in this densely occupied area. Using those factors as predictors in a multiple linear regression analysis of a wide range of pollutants, we have quantified the role of primary LDV or HDV emissions, as well as atmospheric secondary processes, on air quality degradation. Results show a significant contribution of HDV emissions, despite contributing only about 5% of vehicles number in the region. The latter is responsible, for example, of 40% and 47% of benzene and black carbon atmospheric concentration, respectively. This work describes an innovative use of biofuel as a tracer of passenger vehicle emissions, allowing to better understand the role of vehicular sources on air quality degradation in one of most populated megacities worldwide.Joel BritoSamara CarboneDjacinto A. Monteiro dos SantosPamela DominuttiNilmara de Oliveira AlvesLuciana V. RizzoPaulo ArtaxoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Joel Brito Samara Carbone Djacinto A. Monteiro dos Santos Pamela Dominutti Nilmara de Oliveira Alves Luciana V. Rizzo Paulo Artaxo Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
description	Abstract The Sao Paulo Metropolitan Area is a unique case worldwide due to the extensive use of biofuel, particularly ethanol, by its large fleet of nearly 8 million cars. Based on source apportionment analysis of Organic Aerosols in downtown Sao Paulo, and using ethanol as tracer of passenger vehicles, we have identified primary emissions from light-duty-vehicles (LDV) and heavy-duty-vehicles (HDV), as well as secondary process component. Each of those factors mirror a relevant primary source or secondary process in this densely occupied area. Using those factors as predictors in a multiple linear regression analysis of a wide range of pollutants, we have quantified the role of primary LDV or HDV emissions, as well as atmospheric secondary processes, on air quality degradation. Results show a significant contribution of HDV emissions, despite contributing only about 5% of vehicles number in the region. The latter is responsible, for example, of 40% and 47% of benzene and black carbon atmospheric concentration, respectively. This work describes an innovative use of biofuel as a tracer of passenger vehicle emissions, allowing to better understand the role of vehicular sources on air quality degradation in one of most populated megacities worldwide.
format	article
author	Joel Brito Samara Carbone Djacinto A. Monteiro dos Santos Pamela Dominutti Nilmara de Oliveira Alves Luciana V. Rizzo Paulo Artaxo
author_facet	Joel Brito Samara Carbone Djacinto A. Monteiro dos Santos Pamela Dominutti Nilmara de Oliveira Alves Luciana V. Rizzo Paulo Artaxo
author_sort	Joel Brito
title	Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
title_short	Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
title_full	Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
title_fullStr	Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
title_full_unstemmed	Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
title_sort	disentangling vehicular emission impact on urban air pollution using ethanol as a tracer
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/3b054c80042a43228f374ba16ecd198a
work_keys_str_mv	AT joelbrito disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer AT samaracarbone disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer AT djacintoamonteirodossantos disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer AT pameladominutti disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer AT nilmaradeoliveiraalves disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer AT lucianavrizzo disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer AT pauloartaxo disentanglingvehicularemissionimpactonurbanairpollutionusingethanolasatracer
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Disentangling vehicular emission impact on urban air pollution using ethanol as a tracer

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