Characterization of aerosol particles during a high pollution episode over Mexico City

Abstract More than 7 thousand wildfires were recorded over Mexico in 2019, affecting almost 640 thousand hectares. Most of these fires occurred during the spring season generating dense smoke plumes, impacting urban areas in the central part of the Mexican plateau. From May 10 to 17, 2019, biomass b...

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Autores principales:	Giovanni Carabali, José Villanueva-Macias, Luis A. Ladino, Harry Álvarez-Ospina, Graciela B. Raga, Gema Andraca-Ayala, Javier Miranda, Michel Grutter, Ma. Montserrat Silva, David Riveros-Rosas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f0bbc8f7b1a44d5d8c6956965a06f97e
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spelling	oai:doaj.org-article:f0bbc8f7b1a44d5d8c6956965a06f97e2021-11-21T12:19:00ZCharacterization of aerosol particles during a high pollution episode over Mexico City10.1038/s41598-021-01873-42045-2322https://doaj.org/article/f0bbc8f7b1a44d5d8c6956965a06f97e2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01873-4https://doaj.org/toc/2045-2322Abstract More than 7 thousand wildfires were recorded over Mexico in 2019, affecting almost 640 thousand hectares. Most of these fires occurred during the spring season generating dense smoke plumes, impacting urban areas in the central part of the Mexican plateau. From May 10 to 17, 2019, biomass burning (BB) plumes affected Mexico City (MC) and diffused across the basin, producing PM2.5 levels ~ 2 times higher than the nation's air quality standards. Average PM2.5 concentrations increased sharply from 29.4 ± 7.2 µg m−3 to 65.1 ± 13.6 µg m−3 when the dense smoke plumes were detected. The higher particle concentration impacted the aerosol optical depth (AOD) as values ~ 3 times greater than the annual mean (0.32 ± 0.12) were measured, which resulted in a 17% loss of global horizontal irradiation (GHI). Under these severe pollution conditions, the visibility (V a ) was reduced by ~ 80%. The high incidence of strong absorbent particles, such as soot and tarballs was revealed through electron microscopy and X-ray fluorescence (XRF) analysis. These techniques show chemical similarities between MC aerosols and those from the high-altitude (~ 4010 m. a. g. l.) Altzomoni Atmospheric Observatory, evidencing a strong influence of the BB emissions, suggesting a regional transport of these pollutants.Giovanni CarabaliJosé Villanueva-MaciasLuis A. LadinoHarry Álvarez-OspinaGraciela B. RagaGema Andraca-AyalaJavier MirandaMichel GrutterMa. Montserrat SilvaDavid Riveros-RosasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Giovanni Carabali José Villanueva-Macias Luis A. Ladino Harry Álvarez-Ospina Graciela B. Raga Gema Andraca-Ayala Javier Miranda Michel Grutter Ma. Montserrat Silva David Riveros-Rosas Characterization of aerosol particles during a high pollution episode over Mexico City
description	Abstract More than 7 thousand wildfires were recorded over Mexico in 2019, affecting almost 640 thousand hectares. Most of these fires occurred during the spring season generating dense smoke plumes, impacting urban areas in the central part of the Mexican plateau. From May 10 to 17, 2019, biomass burning (BB) plumes affected Mexico City (MC) and diffused across the basin, producing PM2.5 levels ~ 2 times higher than the nation's air quality standards. Average PM2.5 concentrations increased sharply from 29.4 ± 7.2 µg m−3 to 65.1 ± 13.6 µg m−3 when the dense smoke plumes were detected. The higher particle concentration impacted the aerosol optical depth (AOD) as values ~ 3 times greater than the annual mean (0.32 ± 0.12) were measured, which resulted in a 17% loss of global horizontal irradiation (GHI). Under these severe pollution conditions, the visibility (V a ) was reduced by ~ 80%. The high incidence of strong absorbent particles, such as soot and tarballs was revealed through electron microscopy and X-ray fluorescence (XRF) analysis. These techniques show chemical similarities between MC aerosols and those from the high-altitude (~ 4010 m. a. g. l.) Altzomoni Atmospheric Observatory, evidencing a strong influence of the BB emissions, suggesting a regional transport of these pollutants.
format	article
author	Giovanni Carabali José Villanueva-Macias Luis A. Ladino Harry Álvarez-Ospina Graciela B. Raga Gema Andraca-Ayala Javier Miranda Michel Grutter Ma. Montserrat Silva David Riveros-Rosas
author_facet	Giovanni Carabali José Villanueva-Macias Luis A. Ladino Harry Álvarez-Ospina Graciela B. Raga Gema Andraca-Ayala Javier Miranda Michel Grutter Ma. Montserrat Silva David Riveros-Rosas
author_sort	Giovanni Carabali
title	Characterization of aerosol particles during a high pollution episode over Mexico City
title_short	Characterization of aerosol particles during a high pollution episode over Mexico City
title_full	Characterization of aerosol particles during a high pollution episode over Mexico City
title_fullStr	Characterization of aerosol particles during a high pollution episode over Mexico City
title_full_unstemmed	Characterization of aerosol particles during a high pollution episode over Mexico City
title_sort	characterization of aerosol particles during a high pollution episode over mexico city
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f0bbc8f7b1a44d5d8c6956965a06f97e
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Characterization of aerosol particles during a high pollution episode over Mexico City

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