Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble
International audience Abstract North Atlantic sea surface temperatures (SSTs) underwent pronounced multidecadal variability during the twentieth and early twenty-first century. We examine the impacts of this Atlantic Multidecadal Variability (AMV), also referred to as the Atlantic Multidecadal Osci...
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ftunivnantes:oai:HAL:hal-03875174v1 2023-05-15T17:28:25+02:00 Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble Hodson, Daniel Bretonnière, Pierre-Antoine Cassou, Christophe Davini, Paolo Klingaman, Nicholas Lohmann, Katja Lopez-Parages, Jorge Martín-Rey, Marta Moine, Marie-Pierre Monerie, Paul-Arthur Putrasahan, Dian Roberts, Christopher Robson, Jon Ruprich-Robert, Yohan Sanchez-Gomez, Emilia Seddon, Jon Senan, Retish Climat, Environnement, Couplages et Incertitudes Toulouse (CECI) Institut national des sciences de l'Univers (INSU - CNRS)-Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique - CERFACS (CERFACS)-Centre National de la Recherche Scientifique (CNRS) CERFACS Toulouse Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2022-08 https://hal.science/hal-03875174 https://hal.science/hal-03875174/document https://hal.science/hal-03875174/file/s00382-022-06157-9.pdf https://doi.org/10.1007/s00382-022-06157-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-022-06157-9 hal-03875174 https://hal.science/hal-03875174 https://hal.science/hal-03875174/document https://hal.science/hal-03875174/file/s00382-022-06157-9.pdf doi:10.1007/s00382-022-06157-9 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-03875174 Climate Dynamics, 2022, 59 (3-4), pp.805-836. ⟨10.1007/s00382-022-06157-9⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1007/s00382-022-06157-9 2023-02-08T02:06:01Z International audience Abstract North Atlantic sea surface temperatures (SSTs) underwent pronounced multidecadal variability during the twentieth and early twenty-first century. We examine the impacts of this Atlantic Multidecadal Variability (AMV), also referred to as the Atlantic Multidecadal Oscillation (AMO), on climate in an ensemble of five coupled climate models at both low and high spatial resolution. We use a SST nudging scheme specified by the Coupled Model Intercomparision Project’s Decadal Climate Prediction Project Component C (CMIP6 DCPP-C) to impose a persistent positive/negative phase of the AMV in the North Atlantic in coupled model simulations; SSTs are free to evolve outside this region. The large-scale seasonal mean response to the positive AMV involves widespread warming over Eurasia and the Americas, with a pattern of cooling over the Pacific Ocean similar to the Pacific Decadal Oscillation (PDO), together with a northward displacement of the inter-tropical convergence zone (ITCZ). The accompanying changes in global atmospheric circulation lead to widespread changes in precipitation. We use Analysis of Variance (ANOVA) to demonstrate that this large-scale climate response is accompanied by significant differences between models in how they respond to the common AMV forcing, particularly in the tropics. These differences may arise from variations in North Atlantic air-sea heat fluxes between models despite a common North Atlantic SST forcing pattern. We cannot detect a widespread effect of increased model horizontal resolution in this climate response, with the exception of the ITCZ, which shifts further northwards in the positive phase of the AMV in the higher resolution configurations. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Pacific Climate Dynamics 59 3-4 805 836 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Hodson, Daniel Bretonnière, Pierre-Antoine Cassou, Christophe Davini, Paolo Klingaman, Nicholas Lohmann, Katja Lopez-Parages, Jorge Martín-Rey, Marta Moine, Marie-Pierre Monerie, Paul-Arthur Putrasahan, Dian Roberts, Christopher Robson, Jon Ruprich-Robert, Yohan Sanchez-Gomez, Emilia Seddon, Jon Senan, Retish Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Abstract North Atlantic sea surface temperatures (SSTs) underwent pronounced multidecadal variability during the twentieth and early twenty-first century. We examine the impacts of this Atlantic Multidecadal Variability (AMV), also referred to as the Atlantic Multidecadal Oscillation (AMO), on climate in an ensemble of five coupled climate models at both low and high spatial resolution. We use a SST nudging scheme specified by the Coupled Model Intercomparision Project’s Decadal Climate Prediction Project Component C (CMIP6 DCPP-C) to impose a persistent positive/negative phase of the AMV in the North Atlantic in coupled model simulations; SSTs are free to evolve outside this region. The large-scale seasonal mean response to the positive AMV involves widespread warming over Eurasia and the Americas, with a pattern of cooling over the Pacific Ocean similar to the Pacific Decadal Oscillation (PDO), together with a northward displacement of the inter-tropical convergence zone (ITCZ). The accompanying changes in global atmospheric circulation lead to widespread changes in precipitation. We use Analysis of Variance (ANOVA) to demonstrate that this large-scale climate response is accompanied by significant differences between models in how they respond to the common AMV forcing, particularly in the tropics. These differences may arise from variations in North Atlantic air-sea heat fluxes between models despite a common North Atlantic SST forcing pattern. We cannot detect a widespread effect of increased model horizontal resolution in this climate response, with the exception of the ITCZ, which shifts further northwards in the positive phase of the AMV in the higher resolution configurations. |
author2 |
Climat, Environnement, Couplages et Incertitudes Toulouse (CECI) Institut national des sciences de l'Univers (INSU - CNRS)-Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique - CERFACS (CERFACS)-Centre National de la Recherche Scientifique (CNRS) CERFACS Toulouse Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Hodson, Daniel Bretonnière, Pierre-Antoine Cassou, Christophe Davini, Paolo Klingaman, Nicholas Lohmann, Katja Lopez-Parages, Jorge Martín-Rey, Marta Moine, Marie-Pierre Monerie, Paul-Arthur Putrasahan, Dian Roberts, Christopher Robson, Jon Ruprich-Robert, Yohan Sanchez-Gomez, Emilia Seddon, Jon Senan, Retish |
author_facet |
Hodson, Daniel Bretonnière, Pierre-Antoine Cassou, Christophe Davini, Paolo Klingaman, Nicholas Lohmann, Katja Lopez-Parages, Jorge Martín-Rey, Marta Moine, Marie-Pierre Monerie, Paul-Arthur Putrasahan, Dian Roberts, Christopher Robson, Jon Ruprich-Robert, Yohan Sanchez-Gomez, Emilia Seddon, Jon Senan, Retish |
author_sort |
Hodson, Daniel |
title |
Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble |
title_short |
Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble |
title_full |
Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble |
title_fullStr |
Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble |
title_full_unstemmed |
Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble |
title_sort |
coupled climate response to atlantic multidecadal variability in a multi-model multi-resolution ensemble |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03875174 https://hal.science/hal-03875174/document https://hal.science/hal-03875174/file/s00382-022-06157-9.pdf https://doi.org/10.1007/s00382-022-06157-9 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-03875174 Climate Dynamics, 2022, 59 (3-4), pp.805-836. ⟨10.1007/s00382-022-06157-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-022-06157-9 hal-03875174 https://hal.science/hal-03875174 https://hal.science/hal-03875174/document https://hal.science/hal-03875174/file/s00382-022-06157-9.pdf doi:10.1007/s00382-022-06157-9 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00382-022-06157-9 |
container_title |
Climate Dynamics |
container_volume |
59 |
container_issue |
3-4 |
container_start_page |
805 |
op_container_end_page |
836 |
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1766121076418412544 |