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The turbulent future brings a breath of fresh air

Ventilation of health hazardous aerosol pollution within the planetary boundary layer (PBL) – the lowest layer of the atmosphere – is dependent upon turbulent mixing, which again is closely linked to the height of the PBL. Here we show that emissions of both CO(2) and absorbing aerosols such as blac...

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Autores principales: Stjern, Camilla W., Hodnebrog, Øivind, Myhre, Gunnar, Pisso, Ignacio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10287702/
https://www.ncbi.nlm.nih.gov/pubmed/37349317
http://dx.doi.org/10.1038/s41467-023-39298-4
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author Stjern, Camilla W.
Hodnebrog, Øivind
Myhre, Gunnar
Pisso, Ignacio
author_facet Stjern, Camilla W.
Hodnebrog, Øivind
Myhre, Gunnar
Pisso, Ignacio
author_sort Stjern, Camilla W.
collection PubMed
description Ventilation of health hazardous aerosol pollution within the planetary boundary layer (PBL) – the lowest layer of the atmosphere – is dependent upon turbulent mixing, which again is closely linked to the height of the PBL. Here we show that emissions of both CO(2) and absorbing aerosols such as black carbon influence the number of severe air pollution episodes through impacts on turbulence and PBL height. While absorbing aerosols cause increased boundary layer stability and reduced turbulence through atmospheric heating, CO(2) has the opposite effect over land through surface warming. In future scenarios with increasing CO(2) concentrations and reduced aerosol emissions, we find that around 10% of the world’s population currently living in regions with high pollution levels are likely to experience a particularly strong increase in turbulence and PBL height, and thus a reduction in intense pollution events. Our results highlight how these boundary layer processes provide an added positive impact of black carbon mitigation to human health.
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spelling pubmed-102877022023-06-24 The turbulent future brings a breath of fresh air Stjern, Camilla W. Hodnebrog, Øivind Myhre, Gunnar Pisso, Ignacio Nat Commun Article Ventilation of health hazardous aerosol pollution within the planetary boundary layer (PBL) – the lowest layer of the atmosphere – is dependent upon turbulent mixing, which again is closely linked to the height of the PBL. Here we show that emissions of both CO(2) and absorbing aerosols such as black carbon influence the number of severe air pollution episodes through impacts on turbulence and PBL height. While absorbing aerosols cause increased boundary layer stability and reduced turbulence through atmospheric heating, CO(2) has the opposite effect over land through surface warming. In future scenarios with increasing CO(2) concentrations and reduced aerosol emissions, we find that around 10% of the world’s population currently living in regions with high pollution levels are likely to experience a particularly strong increase in turbulence and PBL height, and thus a reduction in intense pollution events. Our results highlight how these boundary layer processes provide an added positive impact of black carbon mitigation to human health. Nature Publishing Group UK 2023-06-22 /pmc/articles/PMC10287702/ /pubmed/37349317 http://dx.doi.org/10.1038/s41467-023-39298-4 Text en © The Author(s) 2023 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Stjern, Camilla W.
Hodnebrog, Øivind
Myhre, Gunnar
Pisso, Ignacio
The turbulent future brings a breath of fresh air
title The turbulent future brings a breath of fresh air
title_full The turbulent future brings a breath of fresh air
title_fullStr The turbulent future brings a breath of fresh air
title_full_unstemmed The turbulent future brings a breath of fresh air
title_short The turbulent future brings a breath of fresh air
title_sort turbulent future brings a breath of fresh air
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10287702/
https://www.ncbi.nlm.nih.gov/pubmed/37349317
http://dx.doi.org/10.1038/s41467-023-39298-4
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