Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation
Observational evidence and climate model experiments suggest a slowdown of the Atlantic Meridional Overturning Circulation (AMOC) since the mid-1990s. Increased greenhouse gases and the declined anthropogenic aerosols (AAs) over North America and Europe are believed to contribute to the AMOC slowdow...
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ftpubmed:oai:pubmedcentral.nih.gov:10762259 2024-02-04T10:01:55+01:00 Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation Liu, Fukai Li, Xun Luo, Yiyong Cai, Wenju Lu, Jian Zheng, Xiao-Tong Kang, Sarah M. Wang, Hai Zhou, Lei 2024-01-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10762259/ http://www.ncbi.nlm.nih.gov/pubmed/38168125 https://doi.org/10.1038/s41467-023-44597-x en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10762259/ http://www.ncbi.nlm.nih.gov/pubmed/38168125 http://dx.doi.org/10.1038/s41467-023-44597-x © The Author(s) 2024 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/) . Nat Commun Article Text 2024 ftpubmed https://doi.org/10.1038/s41467-023-44597-x 2024-01-07T02:01:23Z Observational evidence and climate model experiments suggest a slowdown of the Atlantic Meridional Overturning Circulation (AMOC) since the mid-1990s. Increased greenhouse gases and the declined anthropogenic aerosols (AAs) over North America and Europe are believed to contribute to the AMOC slowdown. Asian AAs continue to increase but the associated impact has been unclear. Using ensembles of climate simulations, here we show that the radiative cooling resulting from increased Asian AAs drives an AMOC reduction. The increased AAs over Asia generate circumglobal stationary Rossby waves in the northern midlatitudes, which shift the westerly jet stream southward and weaken the subpolar North Atlantic westerlies. Consequently, reduced transport of cold air from North America hinders water mass transformation in the Labrador Sea and thus contributes to the AMOC slowdown. The link between increased Asian AAs and an AMOC slowdown is supported by different models with different configurations. Thus, reducing emissions of Asian AAs will not only lower local air pollution, but also help stabilize the AMOC. Text Labrador Sea North Atlantic PubMed Central (PMC) Nature Communications 15 1 |
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Article Liu, Fukai Li, Xun Luo, Yiyong Cai, Wenju Lu, Jian Zheng, Xiao-Tong Kang, Sarah M. Wang, Hai Zhou, Lei Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation |
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Observational evidence and climate model experiments suggest a slowdown of the Atlantic Meridional Overturning Circulation (AMOC) since the mid-1990s. Increased greenhouse gases and the declined anthropogenic aerosols (AAs) over North America and Europe are believed to contribute to the AMOC slowdown. Asian AAs continue to increase but the associated impact has been unclear. Using ensembles of climate simulations, here we show that the radiative cooling resulting from increased Asian AAs drives an AMOC reduction. The increased AAs over Asia generate circumglobal stationary Rossby waves in the northern midlatitudes, which shift the westerly jet stream southward and weaken the subpolar North Atlantic westerlies. Consequently, reduced transport of cold air from North America hinders water mass transformation in the Labrador Sea and thus contributes to the AMOC slowdown. The link between increased Asian AAs and an AMOC slowdown is supported by different models with different configurations. Thus, reducing emissions of Asian AAs will not only lower local air pollution, but also help stabilize the AMOC. |
format |
Text |
author |
Liu, Fukai Li, Xun Luo, Yiyong Cai, Wenju Lu, Jian Zheng, Xiao-Tong Kang, Sarah M. Wang, Hai Zhou, Lei |
author_facet |
Liu, Fukai Li, Xun Luo, Yiyong Cai, Wenju Lu, Jian Zheng, Xiao-Tong Kang, Sarah M. Wang, Hai Zhou, Lei |
author_sort |
Liu, Fukai |
title |
Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation |
title_short |
Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation |
title_full |
Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation |
title_fullStr |
Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation |
title_full_unstemmed |
Increased Asian aerosols drive a slowdown of Atlantic Meridional Overturning Circulation |
title_sort |
increased asian aerosols drive a slowdown of atlantic meridional overturning circulation |
publisher |
Nature Publishing Group UK |
publishDate |
2024 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10762259/ http://www.ncbi.nlm.nih.gov/pubmed/38168125 https://doi.org/10.1038/s41467-023-44597-x |
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Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
Nat Commun |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10762259/ http://www.ncbi.nlm.nih.gov/pubmed/38168125 http://dx.doi.org/10.1038/s41467-023-44597-x |
op_rights |
© The Author(s) 2024 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/) . |
op_doi |
https://doi.org/10.1038/s41467-023-44597-x |
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Nature Communications |
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