Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades
The circulation in the Atlantic Ocean is marked by the complex system of pathways of the Atlantic Meridional Overturning Circulation (AMOC). These currents change meridionally due to the interaction with nearby water masses. Hydrographic data provide the opportunity to characterize these currents fo...
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/os-19-1009-2023 https://doaj.org/article/5a58673d4da3489bbdc586ed8a0fc6be |
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ftdoajarticles:oai:doaj.org/article:5a58673d4da3489bbdc586ed8a0fc6be 2023-07-30T03:57:52+02:00 Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades V. Caínzos M. D. Pérez-Hernández D. Santana-Toscano C. Arumí-Planas A. Hernández-Guerra 2023-07-01T00:00:00Z https://doi.org/10.5194/os-19-1009-2023 https://doaj.org/article/5a58673d4da3489bbdc586ed8a0fc6be EN eng Copernicus Publications https://os.copernicus.org/articles/19/1009/2023/os-19-1009-2023.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-19-1009-2023 1812-0784 1812-0792 https://doaj.org/article/5a58673d4da3489bbdc586ed8a0fc6be Ocean Science, Vol 19, Pp 1009-1045 (2023) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.5194/os-19-1009-2023 2023-07-09T00:34:13Z The circulation in the Atlantic Ocean is marked by the complex system of pathways of the Atlantic Meridional Overturning Circulation (AMOC). These currents change meridionally due to the interaction with nearby water masses. Hydrographic data provide the opportunity to characterize these currents for the whole water column with high-resolution data over the last 30 years. Moreover, inverse methods enable the quantification of absolute zonal transports across these sections, determining the strength of each current at a certain latitude in terms of mass, heat, and freshwater, as well as their transport-weighted temperature and salinity. Generally, no changes can be found among decades for each of the currents in terms of transport or their properties. In the South Atlantic, the circulation describes the subtropical gyre affected by several recirculations. There are nearly 61 Sv entering from the Southern and Indian oceans at 45 ∘ S. The South Atlantic subtropical gyre exports 17.0 ± 1.2 Sv and around 1 PW northward via the North Brazil Current, as well as − 55 Sv southward at 45 ∘ S into the Antarctic Circumpolar Current. In the North Atlantic, most of the transport is advected northward via the western boundary currents, which reduce their strength as they take part in convection processes in the subpolar North Atlantic, also reflected in the northward progress of mass and heat transport. Deep layers carry waters southward along the western boundary, maintaining similar values of mass and heat transport until the separation into an eastern branch crossing the mid-Atlantic Ridge in the South Atlantic. Abyssal waters originating in the Southern Ocean are distributed along the South Atlantic mainly through its western subbasin, flowing northward up to 24.5 ∘ N, subjected to an increasing trend in their temperature with time. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Indian Mid-Atlantic Ridge Southern Ocean The Antarctic Ocean Science 19 4 1009 1045 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 V. Caínzos M. D. Pérez-Hernández D. Santana-Toscano C. Arumí-Planas A. Hernández-Guerra Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
The circulation in the Atlantic Ocean is marked by the complex system of pathways of the Atlantic Meridional Overturning Circulation (AMOC). These currents change meridionally due to the interaction with nearby water masses. Hydrographic data provide the opportunity to characterize these currents for the whole water column with high-resolution data over the last 30 years. Moreover, inverse methods enable the quantification of absolute zonal transports across these sections, determining the strength of each current at a certain latitude in terms of mass, heat, and freshwater, as well as their transport-weighted temperature and salinity. Generally, no changes can be found among decades for each of the currents in terms of transport or their properties. In the South Atlantic, the circulation describes the subtropical gyre affected by several recirculations. There are nearly 61 Sv entering from the Southern and Indian oceans at 45 ∘ S. The South Atlantic subtropical gyre exports 17.0 ± 1.2 Sv and around 1 PW northward via the North Brazil Current, as well as − 55 Sv southward at 45 ∘ S into the Antarctic Circumpolar Current. In the North Atlantic, most of the transport is advected northward via the western boundary currents, which reduce their strength as they take part in convection processes in the subpolar North Atlantic, also reflected in the northward progress of mass and heat transport. Deep layers carry waters southward along the western boundary, maintaining similar values of mass and heat transport until the separation into an eastern branch crossing the mid-Atlantic Ridge in the South Atlantic. Abyssal waters originating in the Southern Ocean are distributed along the South Atlantic mainly through its western subbasin, flowing northward up to 24.5 ∘ N, subjected to an increasing trend in their temperature with time. |
format |
Article in Journal/Newspaper |
author |
V. Caínzos M. D. Pérez-Hernández D. Santana-Toscano C. Arumí-Planas A. Hernández-Guerra |
author_facet |
V. Caínzos M. D. Pérez-Hernández D. Santana-Toscano C. Arumí-Planas A. Hernández-Guerra |
author_sort |
V. Caínzos |
title |
Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades |
title_short |
Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades |
title_full |
Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades |
title_fullStr |
Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades |
title_full_unstemmed |
Consistent picture of the horizontal circulation of the Atlantic Ocean over 3 decades |
title_sort |
consistent picture of the horizontal circulation of the atlantic ocean over 3 decades |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/os-19-1009-2023 https://doaj.org/article/5a58673d4da3489bbdc586ed8a0fc6be |
geographic |
Antarctic Indian Mid-Atlantic Ridge Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Mid-Atlantic Ridge Southern Ocean The Antarctic |
genre |
Antarc* Antarctic North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic North Atlantic Southern Ocean |
op_source |
Ocean Science, Vol 19, Pp 1009-1045 (2023) |
op_relation |
https://os.copernicus.org/articles/19/1009/2023/os-19-1009-2023.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-19-1009-2023 1812-0784 1812-0792 https://doaj.org/article/5a58673d4da3489bbdc586ed8a0fc6be |
op_doi |
https://doi.org/10.5194/os-19-1009-2023 |
container_title |
Ocean Science |
container_volume |
19 |
container_issue |
4 |
container_start_page |
1009 |
op_container_end_page |
1045 |
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1772819880563703808 |