The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality
International audience Numerical model scenarios of future climate depict a global increase in temperatures and changing precipitation patterns, primarily driven by increasing greenhouse gas (GHG) concentrations. Aerosol particles also play an important role by altering the Earth's radiation bu...
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Online Access: | https://hal.science/hal-04115216 https://hal.science/hal-04115216/document https://hal.science/hal-04115216/file/acp-15-1725-2015.pdf https://doi.org/10.5194/acp-15-1725-2015 |
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ftuniversailles:oai:HAL:hal-04115216v1 2024-04-21T08:07:31+00:00 The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality Pausata, F. S. R. Gaetani, M. Messori, G. Kloster, S. Dentener, F. J. Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2015 https://hal.science/hal-04115216 https://hal.science/hal-04115216/document https://hal.science/hal-04115216/file/acp-15-1725-2015.pdf https://doi.org/10.5194/acp-15-1725-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-15-1725-2015 hal-04115216 https://hal.science/hal-04115216 https://hal.science/hal-04115216/document https://hal.science/hal-04115216/file/acp-15-1725-2015.pdf BIBCODE: 2015ACP.15.1725P doi:10.5194/acp-15-1725-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-04115216 Atmospheric Chemistry and Physics, 2015, 15, pp.1725-1743. ⟨10.5194/acp-15-1725-2015⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2015 ftuniversailles https://doi.org/10.5194/acp-15-1725-2015 2024-03-28T00:48:59Z International audience Numerical model scenarios of future climate depict a global increase in temperatures and changing precipitation patterns, primarily driven by increasing greenhouse gas (GHG) concentrations. Aerosol particles also play an important role by altering the Earth's radiation budget and consequently surface temperature. Here, we use the general circulation aerosol model ECHAM5-HAM, coupled to a mixed layer ocean model, to investigate the impacts of future air pollution mitigation strategies in Europe on winter atmospheric circulation over the North Atlantic. We analyse the extreme case of a maximum feasible end-of-pipe reduction of aerosols in the near future (2030), in combination with increasing GHG concentrations. Our results show a more positive North Atlantic Oscillation (NAO) mean state by 2030, together with a significant eastward shift of the southern centre of action of sea-level pressure (SLP). Moreover, we show a significantly increased blocking frequency over the western Mediterranean. By separating the impacts of aerosols and GHGs, our study suggests that future aerosol abatement may be the primary driver of both the eastward shift in the southern SLP centre of action and the increased blocking frequency over the western Mediterranean. These concomitant modifications of the atmospheric circulation over the Euro-Atlantic sector lead to more stagnant weather conditions that favour air pollutant accumulation, especially in the western Mediterranean sector. Changes in atmospheric circulation should therefore be included in future air pollution mitigation assessments. The indicator-based evaluation of atmospheric circulation changes presented in this work will allow an objective first-order assessment of the role of changes in wintertime circulation on future air quality in other climate model simulations. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Atmospheric Chemistry and Physics 15 4 1725 1743 |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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ftuniversailles |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Pausata, F. S. R. Gaetani, M. Messori, G. Kloster, S. Dentener, F. J. The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Numerical model scenarios of future climate depict a global increase in temperatures and changing precipitation patterns, primarily driven by increasing greenhouse gas (GHG) concentrations. Aerosol particles also play an important role by altering the Earth's radiation budget and consequently surface temperature. Here, we use the general circulation aerosol model ECHAM5-HAM, coupled to a mixed layer ocean model, to investigate the impacts of future air pollution mitigation strategies in Europe on winter atmospheric circulation over the North Atlantic. We analyse the extreme case of a maximum feasible end-of-pipe reduction of aerosols in the near future (2030), in combination with increasing GHG concentrations. Our results show a more positive North Atlantic Oscillation (NAO) mean state by 2030, together with a significant eastward shift of the southern centre of action of sea-level pressure (SLP). Moreover, we show a significantly increased blocking frequency over the western Mediterranean. By separating the impacts of aerosols and GHGs, our study suggests that future aerosol abatement may be the primary driver of both the eastward shift in the southern SLP centre of action and the increased blocking frequency over the western Mediterranean. These concomitant modifications of the atmospheric circulation over the Euro-Atlantic sector lead to more stagnant weather conditions that favour air pollutant accumulation, especially in the western Mediterranean sector. Changes in atmospheric circulation should therefore be included in future air pollution mitigation assessments. The indicator-based evaluation of atmospheric circulation changes presented in this work will allow an objective first-order assessment of the role of changes in wintertime circulation on future air quality in other climate model simulations. |
author2 |
Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Pausata, F. S. R. Gaetani, M. Messori, G. Kloster, S. Dentener, F. J. |
author_facet |
Pausata, F. S. R. Gaetani, M. Messori, G. Kloster, S. Dentener, F. J. |
author_sort |
Pausata, F. S. R. |
title |
The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality |
title_short |
The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality |
title_full |
The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality |
title_fullStr |
The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality |
title_full_unstemmed |
The role of aerosol in altering North Atlantic atmospheric circulation in winter and its impact on air quality |
title_sort |
role of aerosol in altering north atlantic atmospheric circulation in winter and its impact on air quality |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-04115216 https://hal.science/hal-04115216/document https://hal.science/hal-04115216/file/acp-15-1725-2015.pdf https://doi.org/10.5194/acp-15-1725-2015 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-04115216 Atmospheric Chemistry and Physics, 2015, 15, pp.1725-1743. ⟨10.5194/acp-15-1725-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-15-1725-2015 hal-04115216 https://hal.science/hal-04115216 https://hal.science/hal-04115216/document https://hal.science/hal-04115216/file/acp-15-1725-2015.pdf BIBCODE: 2015ACP.15.1725P doi:10.5194/acp-15-1725-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-15-1725-2015 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
15 |
container_issue |
4 |
container_start_page |
1725 |
op_container_end_page |
1743 |
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1796947415567171584 |