Directly measured mid-depth circulation in the northeastern North Atlantic Ocean.
International audience The circulation of water masses in the northeastern North Atlantic Ocean has a strong influence on global climate owing to the northward transport of warm subtropical water to high latitudes1. But the ocean circulation at depths below the reach of satellite observations is dif...
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ftccsdartic:oai:HAL:hal-00310107v1 2023-05-15T17:24:22+02:00 Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. Bower, A. S. Le Cann, Bernard Rossby, T. Zenk, W. Gould, J. Speer, K. Richardson, P. L. Prater, M. D. Zhang, H.-M. Woods Hole Oceanographic Institution (WHOI) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Graduate School of Oceanography Narragansett University of Rhode Island (URI) Institut für Meereskunde Kiel (IFMK) Christian-Albrechts-Universität zu Kiel (CAU) Ocean and Earth Science Southampton University of Southampton-National Oceanography Centre (NOC) Department of Oceanography Florida State University Tallahassee (FSU) NOAA National Climatic Data Center (NCDC) National Oceanic and Atmospheric Administration (NOAA) 2002-10-10 https://hal.archives-ouvertes.fr/hal-00310107 https://doi.org/10.1038/nature01078; en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/nature01078; hal-00310107 https://hal.archives-ouvertes.fr/hal-00310107 doi:10.1038/nature01078; ISSN: 0028-0836 EISSN: 1476-4679 Nature https://hal.archives-ouvertes.fr/hal-00310107 Nature, Nature Publishing Group, 2002, 419, pp.603-607. ⟨10.1038/nature01078;⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2002 ftccsdartic https://doi.org/10.1038/nature01078; https://doi.org/10.1038/nature01078 2021-10-24T20:56:08Z International audience The circulation of water masses in the northeastern North Atlantic Ocean has a strong influence on global climate owing to the northward transport of warm subtropical water to high latitudes1. But the ocean circulation at depths below the reach of satellite observations is difficult to measure, and only recently have comprehensive, direct observations of whole ocean basins been possible2, 3, 4. Here we present quantitative maps of the absolute velocities at two levels in the northeastern North Atlantic as obtained from acoustically tracked floats. We find that most of the mean flow transported northward by the Gulf Stream system at the thermocline level (about 600 m depth) remains within the subpolar region, and only relatively little enters the Rockall trough or the Nordic seas. Contrary to previous work5, 6, our data indicate that warm, saline water from the Mediterranean Sea reaches the high latitudes through a combination of narrow slope currents and mixing processes. At both depths under investigation, currents cross the Mid-Atlantic Ridge preferentially over deep gaps in the ridge, demonstrating that sea-floor topography can constrain even upper-ocean circulation patterns. Article in Journal/Newspaper Nordic Seas North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Mid-Atlantic Ridge Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Bower, A. S. Le Cann, Bernard Rossby, T. Zenk, W. Gould, J. Speer, K. Richardson, P. L. Prater, M. D. Zhang, H.-M. Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The circulation of water masses in the northeastern North Atlantic Ocean has a strong influence on global climate owing to the northward transport of warm subtropical water to high latitudes1. But the ocean circulation at depths below the reach of satellite observations is difficult to measure, and only recently have comprehensive, direct observations of whole ocean basins been possible2, 3, 4. Here we present quantitative maps of the absolute velocities at two levels in the northeastern North Atlantic as obtained from acoustically tracked floats. We find that most of the mean flow transported northward by the Gulf Stream system at the thermocline level (about 600 m depth) remains within the subpolar region, and only relatively little enters the Rockall trough or the Nordic seas. Contrary to previous work5, 6, our data indicate that warm, saline water from the Mediterranean Sea reaches the high latitudes through a combination of narrow slope currents and mixing processes. At both depths under investigation, currents cross the Mid-Atlantic Ridge preferentially over deep gaps in the ridge, demonstrating that sea-floor topography can constrain even upper-ocean circulation patterns. |
author2 |
Woods Hole Oceanographic Institution (WHOI) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Graduate School of Oceanography Narragansett University of Rhode Island (URI) Institut für Meereskunde Kiel (IFMK) Christian-Albrechts-Universität zu Kiel (CAU) Ocean and Earth Science Southampton University of Southampton-National Oceanography Centre (NOC) Department of Oceanography Florida State University Tallahassee (FSU) NOAA National Climatic Data Center (NCDC) National Oceanic and Atmospheric Administration (NOAA) |
format |
Article in Journal/Newspaper |
author |
Bower, A. S. Le Cann, Bernard Rossby, T. Zenk, W. Gould, J. Speer, K. Richardson, P. L. Prater, M. D. Zhang, H.-M. |
author_facet |
Bower, A. S. Le Cann, Bernard Rossby, T. Zenk, W. Gould, J. Speer, K. Richardson, P. L. Prater, M. D. Zhang, H.-M. |
author_sort |
Bower, A. S. |
title |
Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. |
title_short |
Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. |
title_full |
Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. |
title_fullStr |
Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. |
title_full_unstemmed |
Directly measured mid-depth circulation in the northeastern North Atlantic Ocean. |
title_sort |
directly measured mid-depth circulation in the northeastern north atlantic ocean. |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.archives-ouvertes.fr/hal-00310107 https://doi.org/10.1038/nature01078; |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Mid-Atlantic Ridge Rockall Trough |
geographic_facet |
Mid-Atlantic Ridge Rockall Trough |
genre |
Nordic Seas North Atlantic |
genre_facet |
Nordic Seas North Atlantic |
op_source |
ISSN: 0028-0836 EISSN: 1476-4679 Nature https://hal.archives-ouvertes.fr/hal-00310107 Nature, Nature Publishing Group, 2002, 419, pp.603-607. ⟨10.1038/nature01078;⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/nature01078; hal-00310107 https://hal.archives-ouvertes.fr/hal-00310107 doi:10.1038/nature01078; |
op_doi |
https://doi.org/10.1038/nature01078; https://doi.org/10.1038/nature01078 |
_version_ |
1766115332296015872 |