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 |
---|---|
Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2011
|
Subjects: | |
Online Access: | https://hal.science/hal-00755389 https://doi.org/10.1016/J.DSR2.2011.01.004 |
id |
ftunivparis:oai:HAL:hal-00755389v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes 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 |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
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) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) 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-PSL) 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://hal.science/hal-00755389 https://doi.org/10.1016/J.DSR2.2011.01.004 |
genre |
Antarc* Antarctic Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Southern Ocean |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.science/hal-00755389 Deep Sea Research Part II: Topical Studies in Oceanography, 2011, 58, pp.2572-2591. ⟨10.1016/J.DSR2.2011.01.004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/J.DSR2.2011.01.004 hal-00755389 https://hal.science/hal-00755389 BIBCODE: 2011DSR.58.2572R doi:10.1016/J.DSR2.2011.01.004 |
op_doi |
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 |
_version_ |
1799468782974926848 |
spelling |
ftunivparis:oai:HAL:hal-00755389v1 2024-05-19T07:30:56+00:00 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) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) 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-PSL) 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 https://hal.science/hal-00755389 https://doi.org/10.1016/J.DSR2.2011.01.004 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/J.DSR2.2011.01.004 hal-00755389 https://hal.science/hal-00755389 BIBCODE: 2011DSR.58.2572R doi:10.1016/J.DSR2.2011.01.004 ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.science/hal-00755389 Deep Sea Research Part II: Topical Studies in Oceanography, 2011, 58, pp.2572-2591. ⟨10.1016/J.DSR2.2011.01.004⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2011 ftunivparis https://doi.org/10.1016/J.DSR2.2011.01.004 2024-04-23T03:25:06Z 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 Université de Paris: Portail HAL Deep Sea Research Part II: Topical Studies in Oceanography 58 25-26 2572 2591 |