Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic
This study combines float data from different projects collected between 1991 and 2003 in the South Atlantic to describe the flow of Antarctic Intermediate Water (AAIW). Velocity space-time averages are calculated for various grid resolutions and with cells deformed to match the bathymetry, f/H or f...
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fttriple:oai:gotriple.eu:10670/1.aeb4ep 2023-05-15T13:35:23+02:00 Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic Nunez Riboni, Ismael Boebel, Olaf Ollitrault, Michel You, Yuzhu Richardson, Philip Davis, Russ 2005-01-01 https://doi.org/10.1016/j.dsr2.2004.12.006 https://archimer.ifremer.fr/doc/2005/publication-781.pdf https://archimer.ifremer.fr/doc/00000/781/ en eng Elsevier doi:10.1016/j.dsr2.2004.12.006 10670/1.aeb4ep https://archimer.ifremer.fr/doc/2005/publication-781.pdf https://archimer.ifremer.fr/doc/00000/781/ Archimer, archive institutionnelle de l'Ifremer Deep Sea Research Part II: Topical Studies in Oceanography (0967-0645) (Elsevier), 2005-02 , Vol. 52 , N. 3-4 , P. 545-564 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2005 fttriple https://doi.org/10.1016/j.dsr2.2004.12.006 2023-01-22T17:09:19Z This study combines float data from different projects collected between 1991 and 2003 in the South Atlantic to describe the flow of Antarctic Intermediate Water (AAIW). Velocity space-time averages are calculated for various grid resolutions and with cells deformed to match the bathymetry, f/H or f/h (with H being the water depth and It being the thickness of the AAIW layer). When judged by the degree of alignment between respective isolines and the resulting average velocity fields, the best grid is based on a nominal cell size of 3° (latitude) by 4° (longitude) with cell shapes deformed according to f/h. Using this grid, objectively estimated mean currents (and their associated errors), as well as meridional and zonal volume transports are estimated. Results show an anticyclonic Subtropical Gyre centred near 36° S and spanning from 23 ± 1° S to 46 + 1° S. The South Atlantic Current meanders from 33° S to 46° S and shows a mean speed of 9.6 ± 7.8 cm s(-1) (8.5 ± 3.5 Sv; 1 Sv = 1 x 10(6) m(3) s(-1)). The northern branch of the Subtropical Gyre is located between 22° s and 32° S and flows westward with a mean speed of 4.7 ± 3.3 cm s(-1) (9.3 ± 3.4 Sv). Evidence of a cyclonic Tropical Gyre divided in two sub-cells is visible on the stream function. © 2005 Elsevier Ltd. All rights reserved. Text Antarc* Antarctic Unknown Antarctic Deep Sea Research Part II: Topical Studies in Oceanography 52 3-4 545 564 |
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geo envir Nunez Riboni, Ismael Boebel, Olaf Ollitrault, Michel You, Yuzhu Richardson, Philip Davis, Russ Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic |
topic_facet |
geo envir |
description |
This study combines float data from different projects collected between 1991 and 2003 in the South Atlantic to describe the flow of Antarctic Intermediate Water (AAIW). Velocity space-time averages are calculated for various grid resolutions and with cells deformed to match the bathymetry, f/H or f/h (with H being the water depth and It being the thickness of the AAIW layer). When judged by the degree of alignment between respective isolines and the resulting average velocity fields, the best grid is based on a nominal cell size of 3° (latitude) by 4° (longitude) with cell shapes deformed according to f/h. Using this grid, objectively estimated mean currents (and their associated errors), as well as meridional and zonal volume transports are estimated. Results show an anticyclonic Subtropical Gyre centred near 36° S and spanning from 23 ± 1° S to 46 + 1° S. The South Atlantic Current meanders from 33° S to 46° S and shows a mean speed of 9.6 ± 7.8 cm s(-1) (8.5 ± 3.5 Sv; 1 Sv = 1 x 10(6) m(3) s(-1)). The northern branch of the Subtropical Gyre is located between 22° s and 32° S and flows westward with a mean speed of 4.7 ± 3.3 cm s(-1) (9.3 ± 3.4 Sv). Evidence of a cyclonic Tropical Gyre divided in two sub-cells is visible on the stream function. © 2005 Elsevier Ltd. All rights reserved. |
format |
Text |
author |
Nunez Riboni, Ismael Boebel, Olaf Ollitrault, Michel You, Yuzhu Richardson, Philip Davis, Russ |
author_facet |
Nunez Riboni, Ismael Boebel, Olaf Ollitrault, Michel You, Yuzhu Richardson, Philip Davis, Russ |
author_sort |
Nunez Riboni, Ismael |
title |
Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic |
title_short |
Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic |
title_full |
Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic |
title_fullStr |
Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic |
title_full_unstemmed |
Lagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlantic |
title_sort |
lagrangian circulation of antarctic intermediate water in the subtropical south atlantic |
publisher |
Elsevier |
publishDate |
2005 |
url |
https://doi.org/10.1016/j.dsr2.2004.12.006 https://archimer.ifremer.fr/doc/2005/publication-781.pdf https://archimer.ifremer.fr/doc/00000/781/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Deep Sea Research Part II: Topical Studies in Oceanography (0967-0645) (Elsevier), 2005-02 , Vol. 52 , N. 3-4 , P. 545-564 |
op_relation |
doi:10.1016/j.dsr2.2004.12.006 10670/1.aeb4ep https://archimer.ifremer.fr/doc/2005/publication-781.pdf https://archimer.ifremer.fr/doc/00000/781/ |
op_doi |
https://doi.org/10.1016/j.dsr2.2004.12.006 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
52 |
container_issue |
3-4 |
container_start_page |
545 |
op_container_end_page |
564 |
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1766065134473576448 |