%0 Journal Article %1 hodson2022coupled %A Hodson, Daniel L. R. %A Bretonnière, Pierre-Antoine %A Cassou, Christophe %A Davini, Paolo %A Klingaman, Nicholas P. %A Lohmann, Katja %A Lopez-Parages, Jorge %A Martín-Rey, Marta %A Moine, Marie-Pierre %A Monerie, Paul-Arthur %A Putrasahan, Dian A. %A Roberts, Christopher D. %A Robson, Jon %A Ruprich-Robert, Yohan %A Sanchez-Gomez, Emilia %A Seddon, Jon %A Senan, Retish %D 2022 %J Climate Dynamics %K impacts %N 3 %P 805--836 %R 10.1007/s00382-022-06157-9 %T Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble %U https://doi.org/10.1007/s00382-022-06157-9 %V 59 %X 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{hodson2022coupled, 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.}, added-at = {2022-06-27T10:49:41.000+0200}, author = {Hodson, Daniel L. R. and Bretonni{\`e}re, Pierre-Antoine and Cassou, Christophe and Davini, Paolo and Klingaman, Nicholas P. and Lohmann, Katja and Lopez-Parages, Jorge and Mart{\'i}n-Rey, Marta and Moine, Marie-Pierre and Monerie, Paul-Arthur and Putrasahan, Dian A. and Roberts, Christopher D. and Robson, Jon and Ruprich-Robert, Yohan and Sanchez-Gomez, Emilia and Seddon, Jon and Senan, Retish}, biburl = {https://www.bibsonomy.org/bibtex/2707c1196260755531e9ce9144e2235b6/laura.jackson}, day = 01, description = {Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble | SpringerLink}, doi = {10.1007/s00382-022-06157-9}, interhash = {56cadabe79ac6189396c2d09c7a474c2}, intrahash = {707c1196260755531e9ce9144e2235b6}, issn = {1432-0894}, journal = {Climate Dynamics}, keywords = {impacts}, month = aug, number = 3, pages = {805--836}, timestamp = {2022-06-27T10:49:41.000+0200}, title = {Coupled climate response to Atlantic Multidecadal Variability in a multi-model multi-resolution ensemble}, url = {https://doi.org/10.1007/s00382-022-06157-9}, volume = 59, year = 2022 }