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Biomass burning aerosols in most climate models are too absorbing
Uncertainty in the representation of biomass burning (BB) aerosol composition and optical properties in climate models contributes to a range in modeled aerosol effects on incoming solar radiation. Depending on the model, the top-of-the-atmosphere BB aerosol effect can range from cooling to warming....
Autores principales: | , , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7804930/ https://www.ncbi.nlm.nih.gov/pubmed/33436592 http://dx.doi.org/10.1038/s41467-020-20482-9 |
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author | Brown, Hunter Liu, Xiaohong Pokhrel, Rudra Murphy, Shane Lu, Zheng Saleh, Rawad Mielonen, Tero Kokkola, Harri Bergman, Tommi Myhre, Gunnar Skeie, Ragnhild B. Watson-Paris, Duncan Stier, Philip Johnson, Ben Bellouin, Nicolas Schulz, Michael Vakkari, Ville Beukes, Johan Paul van Zyl, Pieter Gideon Liu, Shang Chand, Duli |
author_facet | Brown, Hunter Liu, Xiaohong Pokhrel, Rudra Murphy, Shane Lu, Zheng Saleh, Rawad Mielonen, Tero Kokkola, Harri Bergman, Tommi Myhre, Gunnar Skeie, Ragnhild B. Watson-Paris, Duncan Stier, Philip Johnson, Ben Bellouin, Nicolas Schulz, Michael Vakkari, Ville Beukes, Johan Paul van Zyl, Pieter Gideon Liu, Shang Chand, Duli |
author_sort | Brown, Hunter |
collection | PubMed |
description | Uncertainty in the representation of biomass burning (BB) aerosol composition and optical properties in climate models contributes to a range in modeled aerosol effects on incoming solar radiation. Depending on the model, the top-of-the-atmosphere BB aerosol effect can range from cooling to warming. By relating aerosol absorption relative to extinction and carbonaceous aerosol composition from 12 observational datasets to nine state-of-the-art Earth system models/chemical transport models, we identify varying degrees of overestimation in BB aerosol absorptivity by these models. Modifications to BB aerosol refractive index, size, and mixing state improve the Community Atmosphere Model version 5 (CAM5) agreement with observations, leading to a global change in BB direct radiative effect of −0.07 W m(−2), and regional changes of −2 W m(−2) (Africa) and −0.5 W m(−2) (South America/Temperate). Our findings suggest that current modeled BB contributes less to warming than previously thought, largely due to treatments of aerosol mixing state. |
format | Online Article Text |
id | pubmed-7804930 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-78049302021-01-21 Biomass burning aerosols in most climate models are too absorbing Brown, Hunter Liu, Xiaohong Pokhrel, Rudra Murphy, Shane Lu, Zheng Saleh, Rawad Mielonen, Tero Kokkola, Harri Bergman, Tommi Myhre, Gunnar Skeie, Ragnhild B. Watson-Paris, Duncan Stier, Philip Johnson, Ben Bellouin, Nicolas Schulz, Michael Vakkari, Ville Beukes, Johan Paul van Zyl, Pieter Gideon Liu, Shang Chand, Duli Nat Commun Article Uncertainty in the representation of biomass burning (BB) aerosol composition and optical properties in climate models contributes to a range in modeled aerosol effects on incoming solar radiation. Depending on the model, the top-of-the-atmosphere BB aerosol effect can range from cooling to warming. By relating aerosol absorption relative to extinction and carbonaceous aerosol composition from 12 observational datasets to nine state-of-the-art Earth system models/chemical transport models, we identify varying degrees of overestimation in BB aerosol absorptivity by these models. Modifications to BB aerosol refractive index, size, and mixing state improve the Community Atmosphere Model version 5 (CAM5) agreement with observations, leading to a global change in BB direct radiative effect of −0.07 W m(−2), and regional changes of −2 W m(−2) (Africa) and −0.5 W m(−2) (South America/Temperate). Our findings suggest that current modeled BB contributes less to warming than previously thought, largely due to treatments of aerosol mixing state. Nature Publishing Group UK 2021-01-12 /pmc/articles/PMC7804930/ /pubmed/33436592 http://dx.doi.org/10.1038/s41467-020-20482-9 Text en © The Author(s) 2021 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/. |
spellingShingle | Article Brown, Hunter Liu, Xiaohong Pokhrel, Rudra Murphy, Shane Lu, Zheng Saleh, Rawad Mielonen, Tero Kokkola, Harri Bergman, Tommi Myhre, Gunnar Skeie, Ragnhild B. Watson-Paris, Duncan Stier, Philip Johnson, Ben Bellouin, Nicolas Schulz, Michael Vakkari, Ville Beukes, Johan Paul van Zyl, Pieter Gideon Liu, Shang Chand, Duli Biomass burning aerosols in most climate models are too absorbing |
title | Biomass burning aerosols in most climate models are too absorbing |
title_full | Biomass burning aerosols in most climate models are too absorbing |
title_fullStr | Biomass burning aerosols in most climate models are too absorbing |
title_full_unstemmed | Biomass burning aerosols in most climate models are too absorbing |
title_short | Biomass burning aerosols in most climate models are too absorbing |
title_sort | biomass burning aerosols in most climate models are too absorbing |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7804930/ https://www.ncbi.nlm.nih.gov/pubmed/33436592 http://dx.doi.org/10.1038/s41467-020-20482-9 |
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