Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region
International audience The present work aims at better understanding regional climate–aerosol interactions by studying the relationships between aerosols and synoptic atmospheric circulation over the Euro-Mediterranean region. Two 40-year simulations (1979–2018) have been carried out with version 6....
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980/document https://hal.archives-ouvertes.fr/hal-03013980/file/acp-20-8315-2020.pdf https://doi.org/10.5194/acp-20-8315-2020 |
id |
ftccsdartic:oai:HAL:hal-03013980v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Nabat, Pierre Somot, Samuel Cassou, Christophe Mallet, Marc Michou, Martine Bouniol, Dominique Decharme, Bertrand Drugé, Thomas Roehrig, Romain Saint-Martin, David Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience The present work aims at better understanding regional climate–aerosol interactions by studying the relationships between aerosols and synoptic atmospheric circulation over the Euro-Mediterranean region. Two 40-year simulations (1979–2018) have been carried out with version 6.3 of the Centre National de Recherches Météorologiques (National Centre for Meteorological Research) – Aire Limitée Adaptation dynamique Développement InterNational (CNRM-ALADIN) regional climate model, one using interactive aerosols and the other one without any aerosol. The simulation with aerosols has been evaluated in terms of different climate and aerosol parameters. This evaluation shows a good agreement between the model and observations, significant improvements compared to the previous model version and consequently the relevance of using this model for the study of climate–aerosol interactions over this region. A first attempt to explain the climate variability of aerosols is based on the use of the North Atlantic Oscillation (NAO) index. The latter explains a significant part of the interannual variability, notably in winter for the export of dust aerosols over the Atlantic Ocean and the eastern Mediterranean, and in summer for the positive anomalies of anthropogenic aerosols over western Europe. This index is however not sufficient to fully understand the variations of aerosols in this region, notably at daily scale. The use of “weather regimes”, namely persisting meteorological patterns, stable at synoptic scale for a few days, provides a relevant description of atmospheric circulation, which drives the emission, transport and deposition of aerosols. The four weather regimes usually defined in this area in winter and in summer bring significant information to answer this question. The blocking and NAO+ regimes are largely favourable to strong aerosol effects on shortwave surface radiation and near-surface temperature, either because of higher aerosol loads or because of weaker cloud fraction, which ... |
author2 |
Centre national de recherches météorologiques (CNRM) Météo France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Climat, Environnement, Couplages et Incertitudes Toulouse (CECI) CERFACS-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Nabat, Pierre Somot, Samuel Cassou, Christophe Mallet, Marc Michou, Martine Bouniol, Dominique Decharme, Bertrand Drugé, Thomas Roehrig, Romain Saint-Martin, David |
author_facet |
Nabat, Pierre Somot, Samuel Cassou, Christophe Mallet, Marc Michou, Martine Bouniol, Dominique Decharme, Bertrand Drugé, Thomas Roehrig, Romain Saint-Martin, David |
author_sort |
Nabat, Pierre |
title |
Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region |
title_short |
Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region |
title_full |
Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region |
title_fullStr |
Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region |
title_full_unstemmed |
Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region |
title_sort |
modulation of radiative aerosols effects by atmospheric circulation over the euro-mediterranean region |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980/document https://hal.archives-ouvertes.fr/hal-03013980/file/acp-20-8315-2020.pdf https://doi.org/10.5194/acp-20-8315-2020 |
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.archives-ouvertes.fr/hal-03013980 Atmospheric Chemistry and Physics, European Geosciences Union, 2020, 20 (14), pp.8315-8349. ⟨10.5194/acp-20-8315-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-20-8315-2020 hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980/document https://hal.archives-ouvertes.fr/hal-03013980/file/acp-20-8315-2020.pdf doi:10.5194/acp-20-8315-2020 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-20-8315-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
14 |
container_start_page |
8315 |
op_container_end_page |
8349 |
_version_ |
1766135336471101440 |
spelling |
ftccsdartic:oai:HAL:hal-03013980v1 2023-05-15T17:36:00+02:00 Modulation of radiative aerosols effects by atmospheric circulation over the Euro-Mediterranean region Nabat, Pierre Somot, Samuel Cassou, Christophe Mallet, Marc Michou, Martine Bouniol, Dominique Decharme, Bertrand Drugé, Thomas Roehrig, Romain Saint-Martin, David Centre national de recherches météorologiques (CNRM) Météo France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Climat, Environnement, Couplages et Incertitudes Toulouse (CECI) CERFACS-Centre National de la Recherche Scientifique (CNRS) 2020 https://hal.archives-ouvertes.fr/hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980/document https://hal.archives-ouvertes.fr/hal-03013980/file/acp-20-8315-2020.pdf https://doi.org/10.5194/acp-20-8315-2020 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-20-8315-2020 hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980 https://hal.archives-ouvertes.fr/hal-03013980/document https://hal.archives-ouvertes.fr/hal-03013980/file/acp-20-8315-2020.pdf doi:10.5194/acp-20-8315-2020 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.archives-ouvertes.fr/hal-03013980 Atmospheric Chemistry and Physics, European Geosciences Union, 2020, 20 (14), pp.8315-8349. ⟨10.5194/acp-20-8315-2020⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.5194/acp-20-8315-2020 2021-11-28T00:02:04Z International audience The present work aims at better understanding regional climate–aerosol interactions by studying the relationships between aerosols and synoptic atmospheric circulation over the Euro-Mediterranean region. Two 40-year simulations (1979–2018) have been carried out with version 6.3 of the Centre National de Recherches Météorologiques (National Centre for Meteorological Research) – Aire Limitée Adaptation dynamique Développement InterNational (CNRM-ALADIN) regional climate model, one using interactive aerosols and the other one without any aerosol. The simulation with aerosols has been evaluated in terms of different climate and aerosol parameters. This evaluation shows a good agreement between the model and observations, significant improvements compared to the previous model version and consequently the relevance of using this model for the study of climate–aerosol interactions over this region. A first attempt to explain the climate variability of aerosols is based on the use of the North Atlantic Oscillation (NAO) index. The latter explains a significant part of the interannual variability, notably in winter for the export of dust aerosols over the Atlantic Ocean and the eastern Mediterranean, and in summer for the positive anomalies of anthropogenic aerosols over western Europe. This index is however not sufficient to fully understand the variations of aerosols in this region, notably at daily scale. The use of “weather regimes”, namely persisting meteorological patterns, stable at synoptic scale for a few days, provides a relevant description of atmospheric circulation, which drives the emission, transport and deposition of aerosols. The four weather regimes usually defined in this area in winter and in summer bring significant information to answer this question. The blocking and NAO+ regimes are largely favourable to strong aerosol effects on shortwave surface radiation and near-surface temperature, either because of higher aerosol loads or because of weaker cloud fraction, which ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Atmospheric Chemistry and Physics 20 14 8315 8349 |