Zonal intermediate currents in the equatorial Atlantic Ocean.
International audience Acoustic float data collected near 800 m depth, are used to map zonal mean currents within the Antarctic Intermediate Water (AAIW) tongue in the equatorial Atlantic. Alternating zonal jets of 2° latitudinal width are revealed between 6°S and 6°N. Displacements from profiling f...
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ftunivbrest:oai:HAL:hal-00308765v1 2023-12-17T10:19:45+01:00 Zonal intermediate currents in the equatorial Atlantic Ocean. Ollitrault, Michel Lankhorst, Matthias Fratantoni, David Richardson, Philip Zenk, Walter 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) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) Woods Hole Oceanographic Institution (WHOI) 2006 https://hal.science/hal-00308765 https://doi.org/10.1029/2005GL025368 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL025368 hal-00308765 https://hal.science/hal-00308765 doi:10.1029/2005GL025368 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00308765 Geophysical Research Letters, 2006, 33, pp.L05605. ⟨10.1029/2005GL025368⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2006 ftunivbrest https://doi.org/10.1029/2005GL025368 2023-11-21T23:40:17Z International audience Acoustic float data collected near 800 m depth, are used to map zonal mean currents within the Antarctic Intermediate Water (AAIW) tongue in the equatorial Atlantic. Alternating zonal jets of 2° latitudinal width are revealed between 6°S and 6°N. Displacements from profiling floats drifting near 1000 m depth, also reveal similar zonal jets at the base of the AAIW layer. The strongest jets (15 cm s−1 peak) are found at 4°S, 2°S, 0°, 2°N and 4°N. They are coherent longitudinally over order of 3000 km and, poleward of 1°S and 1°N, generally coherent vertically between 800 m and 1000 m. Large seasonal fluctuations exist at both levels: within 1° of equator, AAIW at 800 m flows westward (8 cm s−1 mean) in boreal summer and fall but eastward (3 cm s−1 mean) in winter, whereas the flow at 1000 m is eastward in late fall and winter. Article in Journal/Newspaper Antarc* Antarctic Université de Bretagne Occidentale: HAL Antarctic The Antarctic Geophysical Research Letters 33 5 |
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Open Polar |
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Université de Bretagne Occidentale: HAL |
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ftunivbrest |
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 Ollitrault, Michel Lankhorst, Matthias Fratantoni, David Richardson, Philip Zenk, Walter Zonal intermediate currents in the equatorial Atlantic Ocean. |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Acoustic float data collected near 800 m depth, are used to map zonal mean currents within the Antarctic Intermediate Water (AAIW) tongue in the equatorial Atlantic. Alternating zonal jets of 2° latitudinal width are revealed between 6°S and 6°N. Displacements from profiling floats drifting near 1000 m depth, also reveal similar zonal jets at the base of the AAIW layer. The strongest jets (15 cm s−1 peak) are found at 4°S, 2°S, 0°, 2°N and 4°N. They are coherent longitudinally over order of 3000 km and, poleward of 1°S and 1°N, generally coherent vertically between 800 m and 1000 m. Large seasonal fluctuations exist at both levels: within 1° of equator, AAIW at 800 m flows westward (8 cm s−1 mean) in boreal summer and fall but eastward (3 cm s−1 mean) in winter, whereas the flow at 1000 m is eastward in late fall and winter. |
author2 |
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) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) Woods Hole Oceanographic Institution (WHOI) |
format |
Article in Journal/Newspaper |
author |
Ollitrault, Michel Lankhorst, Matthias Fratantoni, David Richardson, Philip Zenk, Walter |
author_facet |
Ollitrault, Michel Lankhorst, Matthias Fratantoni, David Richardson, Philip Zenk, Walter |
author_sort |
Ollitrault, Michel |
title |
Zonal intermediate currents in the equatorial Atlantic Ocean. |
title_short |
Zonal intermediate currents in the equatorial Atlantic Ocean. |
title_full |
Zonal intermediate currents in the equatorial Atlantic Ocean. |
title_fullStr |
Zonal intermediate currents in the equatorial Atlantic Ocean. |
title_full_unstemmed |
Zonal intermediate currents in the equatorial Atlantic Ocean. |
title_sort |
zonal intermediate currents in the equatorial atlantic ocean. |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00308765 https://doi.org/10.1029/2005GL025368 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00308765 Geophysical Research Letters, 2006, 33, pp.L05605. ⟨10.1029/2005GL025368⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL025368 hal-00308765 https://hal.science/hal-00308765 doi:10.1029/2005GL025368 |
op_doi |
https://doi.org/10.1029/2005GL025368 |
container_title |
Geophysical Research Letters |
container_volume |
33 |
container_issue |
5 |
_version_ |
1785586048312541184 |