Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model
The Southern Ocean exerts a strong influence on global climate, regulating the storage and transport of heat, freshwater and carbon throughout the world's oceans. While the majority of previous studies focus on how wind changes influence Southern Ocean circulation patterns, here we set out to e...
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ftunibolognairis:oai:cris.unibo.it:11585/897234 2024-02-11T10:08:30+01:00 Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model Purich, Ariaan Boschat, Ghyslaine Liguori, Giovanni Purich, Ariaan Boschat, Ghyslaine Liguori, Giovanni 2021 ELETTRONICO https://hdl.handle.net/11585/897234 https://doi.org/10.1038/s41598-021-01306-2 https://www.nature.com/articles/s41598-021-01306-2 eng eng info:eu-repo/semantics/altIdentifier/pmid/34764339 info:eu-repo/semantics/altIdentifier/wos/WOS:000717747400083 volume:11 issue:1 firstpage:1 lastpage:11 numberofpages:11 journal:SCIENTIFIC REPORTS https://hdl.handle.net/11585/897234 doi:10.1038/s41598-021-01306-2 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85118948399 https://www.nature.com/articles/s41598-021-01306-2 info:eu-repo/semantics/openAccess SST variability Coupled Climate Model Southern Ocean info:eu-repo/semantics/article 2021 ftunibolognairis https://doi.org/10.1038/s41598-021-01306-2 2024-01-17T17:36:15Z The Southern Ocean exerts a strong influence on global climate, regulating the storage and transport of heat, freshwater and carbon throughout the world's oceans. While the majority of previous studies focus on how wind changes influence Southern Ocean circulation patterns, here we set out to explore potential feedbacks from the ocean to the atmosphere. To isolate the role of oceanic variability on Southern Hemisphere climate, we perform coupled climate model experiments in which Southern Ocean variability is suppressed by restoring sea surface temperatures (SST) over 40 degrees-65 degrees S to the model's monthly mean climatology. We find that suppressing Southern Ocean SST variability does not impact the Southern Annular Mode, suggesting air-sea feedbacks do not play an important role in the persistence of the Southern Annular Mode in our model. Suppressing Southern Ocean SST variability does lead to robust mean-state changes in SST and sea ice. Changes in mixed layer processes and convection associated with the SST restoring lead to SST warming and a sea ice decline in southern high latitudes, and SST cooling in midlatitudes. These results highlight the impact non-linear processes can have on a model's mean state, and the need to consider these when performing simulations of the Southern Ocean. Article in Journal/Newspaper Sea ice Southern Ocean IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Southern Ocean Scientific Reports 11 1 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
SST variability Coupled Climate Model Southern Ocean |
spellingShingle |
SST variability Coupled Climate Model Southern Ocean Purich, Ariaan Boschat, Ghyslaine Liguori, Giovanni Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model |
topic_facet |
SST variability Coupled Climate Model Southern Ocean |
description |
The Southern Ocean exerts a strong influence on global climate, regulating the storage and transport of heat, freshwater and carbon throughout the world's oceans. While the majority of previous studies focus on how wind changes influence Southern Ocean circulation patterns, here we set out to explore potential feedbacks from the ocean to the atmosphere. To isolate the role of oceanic variability on Southern Hemisphere climate, we perform coupled climate model experiments in which Southern Ocean variability is suppressed by restoring sea surface temperatures (SST) over 40 degrees-65 degrees S to the model's monthly mean climatology. We find that suppressing Southern Ocean SST variability does not impact the Southern Annular Mode, suggesting air-sea feedbacks do not play an important role in the persistence of the Southern Annular Mode in our model. Suppressing Southern Ocean SST variability does lead to robust mean-state changes in SST and sea ice. Changes in mixed layer processes and convection associated with the SST restoring lead to SST warming and a sea ice decline in southern high latitudes, and SST cooling in midlatitudes. These results highlight the impact non-linear processes can have on a model's mean state, and the need to consider these when performing simulations of the Southern Ocean. |
author2 |
Purich, Ariaan Boschat, Ghyslaine Liguori, Giovanni |
format |
Article in Journal/Newspaper |
author |
Purich, Ariaan Boschat, Ghyslaine Liguori, Giovanni |
author_facet |
Purich, Ariaan Boschat, Ghyslaine Liguori, Giovanni |
author_sort |
Purich, Ariaan |
title |
Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model |
title_short |
Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model |
title_full |
Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model |
title_fullStr |
Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model |
title_full_unstemmed |
Assessing the impact of suppressing Southern Ocean SST variability in a coupled climate model |
title_sort |
assessing the impact of suppressing southern ocean sst variability in a coupled climate model |
publishDate |
2021 |
url |
https://hdl.handle.net/11585/897234 https://doi.org/10.1038/s41598-021-01306-2 https://www.nature.com/articles/s41598-021-01306-2 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/34764339 info:eu-repo/semantics/altIdentifier/wos/WOS:000717747400083 volume:11 issue:1 firstpage:1 lastpage:11 numberofpages:11 journal:SCIENTIFIC REPORTS https://hdl.handle.net/11585/897234 doi:10.1038/s41598-021-01306-2 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85118948399 https://www.nature.com/articles/s41598-021-01306-2 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-021-01306-2 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1790607876825284608 |