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

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 (B...

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Autores principales: Carabali, Giovanni, Villanueva-Macias, José, Ladino, Luis A., Álvarez-Ospina, Harry, Raga, Graciela B., Andraca-Ayala, Gema, Miranda, Javier, Grutter, Michel, Silva, Ma. Montserrat, Riveros-Rosas, David
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8602652/
https://www.ncbi.nlm.nih.gov/pubmed/34795342
http://dx.doi.org/10.1038/s41598-021-01873-4
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author Carabali, Giovanni
Villanueva-Macias, José
Ladino, Luis A.
Álvarez-Ospina, Harry
Raga, Graciela B.
Andraca-Ayala, Gema
Miranda, Javier
Grutter, Michel
Silva, Ma. Montserrat
Riveros-Rosas, David
author_facet Carabali, Giovanni
Villanueva-Macias, José
Ladino, Luis A.
Álvarez-Ospina, Harry
Raga, Graciela B.
Andraca-Ayala, Gema
Miranda, Javier
Grutter, Michel
Silva, Ma. Montserrat
Riveros-Rosas, David
author_sort Carabali, Giovanni
collection PubMed
description 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 PM(2.5) levels ~ 2 times higher than the nation's air quality standards. Average PM(2.5) 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.
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spelling pubmed-86026522021-11-22 Characterization of aerosol particles during a high pollution episode over Mexico City Carabali, Giovanni Villanueva-Macias, José Ladino, Luis A. Álvarez-Ospina, Harry Raga, Graciela B. Andraca-Ayala, Gema Miranda, Javier Grutter, Michel Silva, Ma. Montserrat Riveros-Rosas, David Sci Rep Article 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 PM(2.5) levels ~ 2 times higher than the nation's air quality standards. Average PM(2.5) 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. Nature Publishing Group UK 2021-11-18 /pmc/articles/PMC8602652/ /pubmed/34795342 http://dx.doi.org/10.1038/s41598-021-01873-4 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Carabali, Giovanni
Villanueva-Macias, José
Ladino, Luis A.
Álvarez-Ospina, Harry
Raga, Graciela B.
Andraca-Ayala, Gema
Miranda, Javier
Grutter, Michel
Silva, Ma. Montserrat
Riveros-Rosas, David
Characterization of aerosol particles during a high pollution episode over Mexico City
title 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_short 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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8602652/
https://www.ncbi.nlm.nih.gov/pubmed/34795342
http://dx.doi.org/10.1038/s41598-021-01873-4
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