Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates
International audience In January/February 2006, a hydrographic section under Jason track 104 across Drake Passage (DP) was performed twice within 3 weeks, on board of the R/V Polarstern. Two LADCPs mounted on the CTD rosette provided the most comprehensive synoptic top-to-bottom observations of dir...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://doi.org/10.1016/J.DSR2.2011.01.004 https://hal.archives-ouvertes.fr/hal-00755389 |
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English |
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geo envir |
spellingShingle |
geo envir Renault, Alice Provost, Christine Sennéchael, Nathalie Barré, Nicolas Kartavtseff, Annie Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates |
topic_facet |
geo envir |
description |
International audience In January/February 2006, a hydrographic section under Jason track 104 across Drake Passage (DP) was performed twice within 3 weeks, on board of the R/V Polarstern. Two LADCPs mounted on the CTD rosette provided the most comprehensive synoptic top-to-bottom observations of directly measured velocity available in the Drake Passage to date, with an estimated error of less than 3 cm s-1. Geostrophic velocities computed from the hydrographic data were referenced to LADCP velocities. The velocity structure of the Antarctic Circumpolar Current (ACC) along the track and its evolution within 3 weeks reflect the frontal branches presented by Barré et al. (2011) and Provost et al. (2011). The repeated section offers two independent transport estimates, computed from the LADCP velocities (145±8.8 and 137.9±10.5 Sv, respectively) and from the adjusted geostrophic velocities (136.6±7 and 129±7 Sv, respectively). Error bars of the transport estimates are small. Contributions of the fronts and eddies to the total transport are modified within 3 weeks but tend to compensate each other. The total transport is reduced by about 10% (15--17 Sv) between the southward and northward journey. Total transport estimations are compared to previous results, in particular the ISOS (International Southern Ocean Study) data, from which the canonical value of 134 Sv has been estimated. Within the uncertainties due to uneven data distribution, no trend is discernible neither in the baroclinic nor total transports from 1975 to 2006. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Renault, Alice Provost, Christine Sennéchael, Nathalie Barré, Nicolas Kartavtseff, Annie |
author_facet |
Renault, Alice Provost, Christine Sennéchael, Nathalie Barré, Nicolas Kartavtseff, Annie |
author_sort |
Renault, Alice |
title |
Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates |
title_short |
Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates |
title_full |
Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates |
title_fullStr |
Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates |
title_full_unstemmed |
Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates |
title_sort |
two full-depth velocity sections in the drake passage in 2006--transport estimates |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://doi.org/10.1016/J.DSR2.2011.01.004 https://hal.archives-ouvertes.fr/hal-00755389 |
long_lat |
ENVELOPE(-68.550,-68.550,-67.500,-67.500) |
geographic |
Antarctic Barré Drake Passage Southern Ocean The Antarctic |
geographic_facet |
Antarctic Barré Drake Passage Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography Deep Sea Research Part II: Topical Studies in Oceanography, Elsevier, 2011, 58, pp.2572-2591. ⟨10.1016/J.DSR2.2011.01.004⟩ |
op_relation |
hal-00755389 doi:10.1016/J.DSR2.2011.01.004 BIBCODE: 2011DSR.58.2572R 10670/1.rmcvi2 https://hal.archives-ouvertes.fr/hal-00755389 |
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https://doi.org/10.1016/J.DSR2.2011.01.004 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
58 |
container_issue |
25-26 |
container_start_page |
2572 |
op_container_end_page |
2591 |
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1766038322884378624 |
spelling |
fttriple:oai:gotriple.eu:10670/1.rmcvi2 2023-05-15T13:33:05+02:00 Two full-depth velocity sections in the Drake Passage in 2006--Transport estimates Renault, Alice Provost, Christine Sennéchael, Nathalie Barré, Nicolas Kartavtseff, Annie Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2011-12-01 https://doi.org/10.1016/J.DSR2.2011.01.004 https://hal.archives-ouvertes.fr/hal-00755389 en eng HAL CCSD Elsevier hal-00755389 doi:10.1016/J.DSR2.2011.01.004 BIBCODE: 2011DSR.58.2572R 10670/1.rmcvi2 https://hal.archives-ouvertes.fr/hal-00755389 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography Deep Sea Research Part II: Topical Studies in Oceanography, Elsevier, 2011, 58, pp.2572-2591. ⟨10.1016/J.DSR2.2011.01.004⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.1016/J.DSR2.2011.01.004 2023-01-22T17:08:56Z International audience In January/February 2006, a hydrographic section under Jason track 104 across Drake Passage (DP) was performed twice within 3 weeks, on board of the R/V Polarstern. Two LADCPs mounted on the CTD rosette provided the most comprehensive synoptic top-to-bottom observations of directly measured velocity available in the Drake Passage to date, with an estimated error of less than 3 cm s-1. Geostrophic velocities computed from the hydrographic data were referenced to LADCP velocities. The velocity structure of the Antarctic Circumpolar Current (ACC) along the track and its evolution within 3 weeks reflect the frontal branches presented by Barré et al. (2011) and Provost et al. (2011). The repeated section offers two independent transport estimates, computed from the LADCP velocities (145±8.8 and 137.9±10.5 Sv, respectively) and from the adjusted geostrophic velocities (136.6±7 and 129±7 Sv, respectively). Error bars of the transport estimates are small. Contributions of the fronts and eddies to the total transport are modified within 3 weeks but tend to compensate each other. The total transport is reduced by about 10% (15--17 Sv) between the southward and northward journey. Total transport estimations are compared to previous results, in particular the ISOS (International Southern Ocean Study) data, from which the canonical value of 134 Sv has been estimated. Within the uncertainties due to uneven data distribution, no trend is discernible neither in the baroclinic nor total transports from 1975 to 2006. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Southern Ocean Unknown Antarctic Barré ENVELOPE(-68.550,-68.550,-67.500,-67.500) Drake Passage Southern Ocean The Antarctic Deep Sea Research Part II: Topical Studies in Oceanography 58 25-26 2572 2591 |