Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3
We report a multi-centennial oscillation of the Atlantic Meridional Overturning Circulation (AMOC) simulated by the ECEarth3 climate model under the pre-industrial climate. This oscillation has an amplitude of ~6 Sv and a period of ~150 years and signifcantly impacts the atmosphere. We fnd that it i...
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Online Access: | https://hdl.handle.net/11583/2972641 https://doi.org/10.1007/s00382-022-06534-4 https://link.springer.com/article/10.1007/s00382-022-06534-4 |
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ftpoltorinoiris:oai:iris.polito.it:11583/2972641 2024-04-14T08:06:30+00:00 Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 Meccia, Virna L. Fuentes-Franco, Ramón Davini, Paolo Bellomo, Katinka Fabiano, Federico Yang, Shuting von Hardenberg, Jost Meccia, Virna L. Fuentes-Franco, Ramón Davini, Paolo Bellomo, Katinka Fabiano, Federico Yang, Shuting von Hardenberg, Jost 2022 https://hdl.handle.net/11583/2972641 https://doi.org/10.1007/s00382-022-06534-4 https://link.springer.com/article/10.1007/s00382-022-06534-4 eng eng Springer info:eu-repo/semantics/altIdentifier/wos/WOS:000870935500001 numberofpages:18 journal:CLIMATE DYNAMICS https://hdl.handle.net/11583/2972641 doi:10.1007/s00382-022-06534-4 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85140341824 https://link.springer.com/article/10.1007/s00382-022-06534-4 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article 2022 ftpoltorinoiris https://doi.org/10.1007/s00382-022-06534-4 2024-03-21T16:08:55Z We report a multi-centennial oscillation of the Atlantic Meridional Overturning Circulation (AMOC) simulated by the ECEarth3 climate model under the pre-industrial climate. This oscillation has an amplitude of ~6 Sv and a period of ~150 years and signifcantly impacts the atmosphere. We fnd that it is a self-sustained low-frequency internal variability, driven by the accumulation of salinity anomalies in the Arctic and their release into the North Atlantic, afecting the water column stability and the deep convection. Sea ice plays a major role in creating the salinity anomaly in the Arctic, while the anomalous Arctic oceanic circulation, which drives the exchange of liquid freshwater between the Arctic and the open ocean, is the main responsible for its southward propagation. Interestingly, EC-Earth3 simulations with increased greenhouse concentrations, and therefore under a warmer climate, do not exhibit these strong AMOC fuctuations. We hypothesize that in a quasi-equilibrium climate with a global air surface temperature 4.5° higher than the pre-industrial period, the low amount of sea ice in the high latitudes of the North Atlantic is no longer able to trigger the mechanism. Article in Journal/Newspaper Arctic North Atlantic Sea ice PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino) Arctic Climate Dynamics |
institution |
Open Polar |
collection |
PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino) |
op_collection_id |
ftpoltorinoiris |
language |
English |
description |
We report a multi-centennial oscillation of the Atlantic Meridional Overturning Circulation (AMOC) simulated by the ECEarth3 climate model under the pre-industrial climate. This oscillation has an amplitude of ~6 Sv and a period of ~150 years and signifcantly impacts the atmosphere. We fnd that it is a self-sustained low-frequency internal variability, driven by the accumulation of salinity anomalies in the Arctic and their release into the North Atlantic, afecting the water column stability and the deep convection. Sea ice plays a major role in creating the salinity anomaly in the Arctic, while the anomalous Arctic oceanic circulation, which drives the exchange of liquid freshwater between the Arctic and the open ocean, is the main responsible for its southward propagation. Interestingly, EC-Earth3 simulations with increased greenhouse concentrations, and therefore under a warmer climate, do not exhibit these strong AMOC fuctuations. We hypothesize that in a quasi-equilibrium climate with a global air surface temperature 4.5° higher than the pre-industrial period, the low amount of sea ice in the high latitudes of the North Atlantic is no longer able to trigger the mechanism. |
author2 |
Meccia, Virna L. Fuentes-Franco, Ramón Davini, Paolo Bellomo, Katinka Fabiano, Federico Yang, Shuting von Hardenberg, Jost |
format |
Article in Journal/Newspaper |
author |
Meccia, Virna L. Fuentes-Franco, Ramón Davini, Paolo Bellomo, Katinka Fabiano, Federico Yang, Shuting von Hardenberg, Jost |
spellingShingle |
Meccia, Virna L. Fuentes-Franco, Ramón Davini, Paolo Bellomo, Katinka Fabiano, Federico Yang, Shuting von Hardenberg, Jost Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 |
author_facet |
Meccia, Virna L. Fuentes-Franco, Ramón Davini, Paolo Bellomo, Katinka Fabiano, Federico Yang, Shuting von Hardenberg, Jost |
author_sort |
Meccia, Virna L. |
title |
Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 |
title_short |
Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 |
title_full |
Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 |
title_fullStr |
Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 |
title_full_unstemmed |
Internal multi-centennial variability of the Atlantic Meridional Overturning Circulation simulated by EC-Earth3 |
title_sort |
internal multi-centennial variability of the atlantic meridional overturning circulation simulated by ec-earth3 |
publisher |
Springer |
publishDate |
2022 |
url |
https://hdl.handle.net/11583/2972641 https://doi.org/10.1007/s00382-022-06534-4 https://link.springer.com/article/10.1007/s00382-022-06534-4 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic Sea ice |
genre_facet |
Arctic North Atlantic Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000870935500001 numberofpages:18 journal:CLIMATE DYNAMICS https://hdl.handle.net/11583/2972641 doi:10.1007/s00382-022-06534-4 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85140341824 https://link.springer.com/article/10.1007/s00382-022-06534-4 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00382-022-06534-4 |
container_title |
Climate Dynamics |
_version_ |
1796303459433054208 |