Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection
21 pages, 10 figures, 3 tables, supporting information https://doi.org/10.1029/2021JC018150.-- Data Availability Statement: The hydrographic and biogeochemical cruise data is available at the Clivar and Carbon Hydrographic Data Office (Rios et al., 2012) and the hydrographic and velocity data for le...
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American Geophysical Union
2022
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Online Access: | http://hdl.handle.net/10261/272067 https://doi.org/10.1029/2021JC018150 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100003329 |
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ftcsic:oai:digital.csic.es:10261/272067 2024-02-11T10:06:22+01:00 Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection Vallès Casanova, Ignasi Berenguer Fraile-Nuez, Eugenio Martín-Rey, Marta van Sebille, E. Cabré Albos, Anna Olivé Abelló, Anna Pelegrí, Josep Lluís Ministerio de Ciencia, Innovación y Universidades (España) Ministerio de Economía y Competitividad (España) European Commission Agencia Estatal de Investigación (España) 2022-05 http://hdl.handle.net/10261/272067 https://doi.org/10.1029/2021JC018150 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100003329 en eng American Geophysical Union #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-100844-B-C33/ES/EL PORTAL SUDATLANTICO EN LA CINTA TRANSPORTADORA GLOBAL/ info:eu-repo/grantAgreement/MINECO//BES-2015-071314/ES/BES-2015-071314/ info:eu-repo/grantAgreement/EC/H2020/797236 Publisher's version https://doi.org/10.1029/2021JC018150 Sí Journal of Geophysical Research - Part C - Oceans 127(5): e2021JC018150 (2022) CEX2019-000928-S http://hdl.handle.net/10261/272067 doi:10.1029/2021JC018150 2169-9291 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 open artículo 2022 ftcsic https://doi.org/10.1029/2021JC01815010.13039/50110001103310.13039/50110000078010.13039/501100003329 2024-01-16T11:25:42Z 21 pages, 10 figures, 3 tables, supporting information https://doi.org/10.1029/2021JC018150.-- Data Availability Statement: The hydrographic and biogeochemical cruise data is available at the Clivar and Carbon Hydrographic Data Office (Rios et al., 2012) and the hydrographic and velocity data for leg 1 of the cruise is available at Zenodo (https://doi.org/10.5281/zenodo.6359412; Pelegrí et al., 2022) The equatorial retroflection of the North Brazil Current (NBC) into the Equatorial Undercurrent (EUC) and its posterior tropical recirculation is a major regulator for the returning limb of the Atlantic Meridional Overturning Circulation. Indeed, most surface and thermocline NBC waters retroflect at the equator all the way into the central and eastern Atlantic Ocean, before they recirculate back through the tropics to the western boundary. Here, we use cruise data in the western equatorial Atlantic during April 2010 and reanalysis time series for the equatorial and tropical waters in both hemispheres in order to explore the recirculation pathways and transport variability. During the 1998–2016 period, the annual-mean EUC transports 15.1 ± 1.3 Sv at 32°W, with 2.8 ± 0.4 Sv from the North Atlantic and 11.4 ± 1.3 Sv from the South Atlantic. At 32°W most of the total EUC transport comes from the western boundary retroflection south of 3°N (7.2 ± 0.9 Sv), a substantial fraction retroflects north of 3°N (5.6 ± 0.4 Sv), and the remaining flow (2.3 Sv) joins through the interior basin. The South Atlantic subtropical waters feed the EUC at all thermocline depths while the North Atlantic and South Atlantic tropical waters do so at the surface and upper-thermocline levels. The EUC transport at 32°W has a pronounced seasonality, with spring and fall maxima and a range of 8.8 Sv. The 18 yr of reanalysis data shows a weak yet significant correlation with an Atlantic Niño index, and also suggests an enhanced contribution from the South Atlantic tropical waters during 2008–2016 as compared with 1997–2007 This work has been ... Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Journal of Geophysical Research: Oceans 127 5 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
21 pages, 10 figures, 3 tables, supporting information https://doi.org/10.1029/2021JC018150.-- Data Availability Statement: The hydrographic and biogeochemical cruise data is available at the Clivar and Carbon Hydrographic Data Office (Rios et al., 2012) and the hydrographic and velocity data for leg 1 of the cruise is available at Zenodo (https://doi.org/10.5281/zenodo.6359412; Pelegrí et al., 2022) The equatorial retroflection of the North Brazil Current (NBC) into the Equatorial Undercurrent (EUC) and its posterior tropical recirculation is a major regulator for the returning limb of the Atlantic Meridional Overturning Circulation. Indeed, most surface and thermocline NBC waters retroflect at the equator all the way into the central and eastern Atlantic Ocean, before they recirculate back through the tropics to the western boundary. Here, we use cruise data in the western equatorial Atlantic during April 2010 and reanalysis time series for the equatorial and tropical waters in both hemispheres in order to explore the recirculation pathways and transport variability. During the 1998–2016 period, the annual-mean EUC transports 15.1 ± 1.3 Sv at 32°W, with 2.8 ± 0.4 Sv from the North Atlantic and 11.4 ± 1.3 Sv from the South Atlantic. At 32°W most of the total EUC transport comes from the western boundary retroflection south of 3°N (7.2 ± 0.9 Sv), a substantial fraction retroflects north of 3°N (5.6 ± 0.4 Sv), and the remaining flow (2.3 Sv) joins through the interior basin. The South Atlantic subtropical waters feed the EUC at all thermocline depths while the North Atlantic and South Atlantic tropical waters do so at the surface and upper-thermocline levels. The EUC transport at 32°W has a pronounced seasonality, with spring and fall maxima and a range of 8.8 Sv. The 18 yr of reanalysis data shows a weak yet significant correlation with an Atlantic Niño index, and also suggests an enhanced contribution from the South Atlantic tropical waters during 2008–2016 as compared with 1997–2007 This work has been ... |
author2 |
Ministerio de Ciencia, Innovación y Universidades (España) Ministerio de Economía y Competitividad (España) European Commission Agencia Estatal de Investigación (España) |
format |
Article in Journal/Newspaper |
author |
Vallès Casanova, Ignasi Berenguer Fraile-Nuez, Eugenio Martín-Rey, Marta van Sebille, E. Cabré Albos, Anna Olivé Abelló, Anna Pelegrí, Josep Lluís |
spellingShingle |
Vallès Casanova, Ignasi Berenguer Fraile-Nuez, Eugenio Martín-Rey, Marta van Sebille, E. Cabré Albos, Anna Olivé Abelló, Anna Pelegrí, Josep Lluís Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection |
author_facet |
Vallès Casanova, Ignasi Berenguer Fraile-Nuez, Eugenio Martín-Rey, Marta van Sebille, E. Cabré Albos, Anna Olivé Abelló, Anna Pelegrí, Josep Lluís |
author_sort |
Vallès Casanova, Ignasi Berenguer |
title |
Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection |
title_short |
Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection |
title_full |
Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection |
title_fullStr |
Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection |
title_full_unstemmed |
Water Mass Transports and Pathways in the North Brazil-Equatorial Undercurrent Retroflection |
title_sort |
water mass transports and pathways in the north brazil-equatorial undercurrent retroflection |
publisher |
American Geophysical Union |
publishDate |
2022 |
url |
http://hdl.handle.net/10261/272067 https://doi.org/10.1029/2021JC018150 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100003329 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-100844-B-C33/ES/EL PORTAL SUDATLANTICO EN LA CINTA TRANSPORTADORA GLOBAL/ info:eu-repo/grantAgreement/MINECO//BES-2015-071314/ES/BES-2015-071314/ info:eu-repo/grantAgreement/EC/H2020/797236 Publisher's version https://doi.org/10.1029/2021JC018150 Sí Journal of Geophysical Research - Part C - Oceans 127(5): e2021JC018150 (2022) CEX2019-000928-S http://hdl.handle.net/10261/272067 doi:10.1029/2021JC018150 2169-9291 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 |
op_rights |
open |
op_doi |
https://doi.org/10.1029/2021JC01815010.13039/50110001103310.13039/50110000078010.13039/501100003329 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
5 |
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1790604027807924224 |