Observed change and the extent of coherence in the Gulf Stream system
By transporting warm and salty water poleward, the Gulf Stream system maintains a mild climate in northwestern Europe while also facilitating the dense water formation that feeds the deep ocean. The sensitivity of North Atlantic circulation to future greenhouse gas emissions seen in climate models h...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070387 2024-01-14T10:08:47+01:00 Observed change and the extent of coherence in the Gulf Stream system Asbjørnsen, Helene Eldevik, Tor Skrefsrud, Johanne Johnson, Helen L. Sanchez-Franks, Alejandra 2023-12 electronic https://doi.org/10.5194/egusphere-2023-2963 https://noa.gwlb.de/receive/cop_mods_00070387 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068736/egusphere-2023-2963.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2963/egusphere-2023-2963.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2963 https://noa.gwlb.de/receive/cop_mods_00070387 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068736/egusphere-2023-2963.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2963/egusphere-2023-2963.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2963 2023-12-18T00:22:48Z By transporting warm and salty water poleward, the Gulf Stream system maintains a mild climate in northwestern Europe while also facilitating the dense water formation that feeds the deep ocean. The sensitivity of North Atlantic circulation to future greenhouse gas emissions seen in climate models has prompted an increasing effort to monitor the various ocean circulation components in recent decades. Here, we synthesise available ocean transport measurements from several observational programs in the North Atlantic and Nordic Seas, as well as an ocean state estimate (ECCOv4-r4), for an enhanced understanding of the Gulf Stream and its poleward extensions as an interconnected circulation system. We see limited coherence between the records on interannual time scales, highlighting the local oceanic response to atmospheric circulation patterns and variable recirculation time scales within the gyres. On decadal time scales, we find a weakening subtropical circulation between the mid-2000s and mid-2010s, while the inflow and circulation in the Nordic Seas remained stable. Differing decadal trends in the subtropics, subpolar North Atlantic, and Nordic Seas warrant caution in using observational records at a single latitude to infer large-scale circulation change. Article in Journal/Newspaper Nordic Seas North Atlantic Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Asbjørnsen, Helene Eldevik, Tor Skrefsrud, Johanne Johnson, Helen L. Sanchez-Franks, Alejandra Observed change and the extent of coherence in the Gulf Stream system |
topic_facet |
article Verlagsveröffentlichung |
description |
By transporting warm and salty water poleward, the Gulf Stream system maintains a mild climate in northwestern Europe while also facilitating the dense water formation that feeds the deep ocean. The sensitivity of North Atlantic circulation to future greenhouse gas emissions seen in climate models has prompted an increasing effort to monitor the various ocean circulation components in recent decades. Here, we synthesise available ocean transport measurements from several observational programs in the North Atlantic and Nordic Seas, as well as an ocean state estimate (ECCOv4-r4), for an enhanced understanding of the Gulf Stream and its poleward extensions as an interconnected circulation system. We see limited coherence between the records on interannual time scales, highlighting the local oceanic response to atmospheric circulation patterns and variable recirculation time scales within the gyres. On decadal time scales, we find a weakening subtropical circulation between the mid-2000s and mid-2010s, while the inflow and circulation in the Nordic Seas remained stable. Differing decadal trends in the subtropics, subpolar North Atlantic, and Nordic Seas warrant caution in using observational records at a single latitude to infer large-scale circulation change. |
format |
Article in Journal/Newspaper |
author |
Asbjørnsen, Helene Eldevik, Tor Skrefsrud, Johanne Johnson, Helen L. Sanchez-Franks, Alejandra |
author_facet |
Asbjørnsen, Helene Eldevik, Tor Skrefsrud, Johanne Johnson, Helen L. Sanchez-Franks, Alejandra |
author_sort |
Asbjørnsen, Helene |
title |
Observed change and the extent of coherence in the Gulf Stream system |
title_short |
Observed change and the extent of coherence in the Gulf Stream system |
title_full |
Observed change and the extent of coherence in the Gulf Stream system |
title_fullStr |
Observed change and the extent of coherence in the Gulf Stream system |
title_full_unstemmed |
Observed change and the extent of coherence in the Gulf Stream system |
title_sort |
observed change and the extent of coherence in the gulf stream system |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-2963 https://noa.gwlb.de/receive/cop_mods_00070387 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068736/egusphere-2023-2963.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2963/egusphere-2023-2963.pdf |
genre |
Nordic Seas North Atlantic |
genre_facet |
Nordic Seas North Atlantic |
op_relation |
https://doi.org/10.5194/egusphere-2023-2963 https://noa.gwlb.de/receive/cop_mods_00070387 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068736/egusphere-2023-2963.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2963/egusphere-2023-2963.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2963 |
_version_ |
1788063194076413952 |