The spreading of Antarctic bottom water in the tropical Atlantic
Hydrographic and tracer [chlorofluorocarbon (CFC), component F11] data in the tropical Atlantic off Brazil taken in spring 1994 are used to describe the development of the water mass characteristics of Antarctic Bottom Water (AABW) between 10 degrees S and 11 degrees N. To compute the AABW transport...
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1998
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ftoceanrep:oai:oceanrep.geomar.de:1627 2023-05-15T14:13:08+02:00 The spreading of Antarctic bottom water in the tropical Atlantic Rhein, Monika Stramma, Lothar Krahmann, Gerd 1998 text https://oceanrep.geomar.de/id/eprint/1627/ https://oceanrep.geomar.de/id/eprint/1627/1/1-s2.0-S0967063797000307-main.pdf https://doi.org/10.1016/S0967-0637(97)00030-7 en eng Elsevier https://oceanrep.geomar.de/id/eprint/1627/1/1-s2.0-S0967063797000307-main.pdf Rhein, M., Stramma, L. and Krahmann, G. (1998) The spreading of Antarctic bottom water in the tropical Atlantic. Deep Sea Research Part I: Oceanographic Research Papers, 45 (4-5). pp. 507-527. DOI 10.1016/S0967-0637(97)00030-7 <https://doi.org/10.1016/S0967-0637%2897%2900030-7>. doi:10.1016/S0967-0637(97)00030-7 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1998 ftoceanrep https://doi.org/10.1016/S0967-0637(97)00030-7 2023-04-07T14:44:18Z Hydrographic and tracer [chlorofluorocarbon (CFC), component F11] data in the tropical Atlantic off Brazil taken in spring 1994 are used to describe the development of the water mass characteristics of Antarctic Bottom Water (AABW) between 10 degrees S and 11 degrees N. To compute the AABW transports, geostrophic computations and directly measured velocity fields are combined. Velocity profiles were measured with the Pegasus profiling system and an ADCP attached to the CTD. The F11 increase from 10 degrees S to 11 degrees N, mainly in the upper part of the tracer-poor AABW, reveals the mixing of AABW along its path with the overlying North Atlantic Deep Water, which carries a significant F11 signal in the equatorial Atlantic. While propagating north of 5 degrees S, the AABW shifts to higher salinities at a given temperature. About one-third of the northward flowing AABW at 10 degrees S (4.8 Sv) and at 5 degrees S (4.7 Sv) west of about 31 degrees 30'W enters the Guiana Basin, mainly through the southern half of the Equatorial Channel at 35 degrees W (1.5-1.8 Sv). The other part recirculates and some of it flows through the Romanche Fracture Zone into the eastern Atlantic. In the Guiana Basin, west of 40 degrees W, the sloping topography and the strong, eastward flowing deep western boundary current might prevent the AABW from flowing west: thus it has to turn north at the eastern slope of the Ceara Rise (2.2 Sv). At 44 degrees W, north of the Ceara Rise, AABW flows west in the interior of the basin in a main core near 7 degrees 15'N (1.9 Sv). A net return how of about 0.5 Sv was found north of 8 degrees 43'N. A large fraction of the AABW (1.1 Sv) enters the eastern Atlantic through the Vema Fracture Zone, leaving only 0.3 Sv of AABW for the western Atlantic basins Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Deep Sea Research Part I: Oceanographic Research Papers 45 4-5 507 527 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Hydrographic and tracer [chlorofluorocarbon (CFC), component F11] data in the tropical Atlantic off Brazil taken in spring 1994 are used to describe the development of the water mass characteristics of Antarctic Bottom Water (AABW) between 10 degrees S and 11 degrees N. To compute the AABW transports, geostrophic computations and directly measured velocity fields are combined. Velocity profiles were measured with the Pegasus profiling system and an ADCP attached to the CTD. The F11 increase from 10 degrees S to 11 degrees N, mainly in the upper part of the tracer-poor AABW, reveals the mixing of AABW along its path with the overlying North Atlantic Deep Water, which carries a significant F11 signal in the equatorial Atlantic. While propagating north of 5 degrees S, the AABW shifts to higher salinities at a given temperature. About one-third of the northward flowing AABW at 10 degrees S (4.8 Sv) and at 5 degrees S (4.7 Sv) west of about 31 degrees 30'W enters the Guiana Basin, mainly through the southern half of the Equatorial Channel at 35 degrees W (1.5-1.8 Sv). The other part recirculates and some of it flows through the Romanche Fracture Zone into the eastern Atlantic. In the Guiana Basin, west of 40 degrees W, the sloping topography and the strong, eastward flowing deep western boundary current might prevent the AABW from flowing west: thus it has to turn north at the eastern slope of the Ceara Rise (2.2 Sv). At 44 degrees W, north of the Ceara Rise, AABW flows west in the interior of the basin in a main core near 7 degrees 15'N (1.9 Sv). A net return how of about 0.5 Sv was found north of 8 degrees 43'N. A large fraction of the AABW (1.1 Sv) enters the eastern Atlantic through the Vema Fracture Zone, leaving only 0.3 Sv of AABW for the western Atlantic basins |
format |
Article in Journal/Newspaper |
author |
Rhein, Monika Stramma, Lothar Krahmann, Gerd |
spellingShingle |
Rhein, Monika Stramma, Lothar Krahmann, Gerd The spreading of Antarctic bottom water in the tropical Atlantic |
author_facet |
Rhein, Monika Stramma, Lothar Krahmann, Gerd |
author_sort |
Rhein, Monika |
title |
The spreading of Antarctic bottom water in the tropical Atlantic |
title_short |
The spreading of Antarctic bottom water in the tropical Atlantic |
title_full |
The spreading of Antarctic bottom water in the tropical Atlantic |
title_fullStr |
The spreading of Antarctic bottom water in the tropical Atlantic |
title_full_unstemmed |
The spreading of Antarctic bottom water in the tropical Atlantic |
title_sort |
spreading of antarctic bottom water in the tropical atlantic |
publisher |
Elsevier |
publishDate |
1998 |
url |
https://oceanrep.geomar.de/id/eprint/1627/ https://oceanrep.geomar.de/id/eprint/1627/1/1-s2.0-S0967063797000307-main.pdf https://doi.org/10.1016/S0967-0637(97)00030-7 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/1627/1/1-s2.0-S0967063797000307-main.pdf Rhein, M., Stramma, L. and Krahmann, G. (1998) The spreading of Antarctic bottom water in the tropical Atlantic. Deep Sea Research Part I: Oceanographic Research Papers, 45 (4-5). pp. 507-527. DOI 10.1016/S0967-0637(97)00030-7 <https://doi.org/10.1016/S0967-0637%2897%2900030-7>. doi:10.1016/S0967-0637(97)00030-7 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/S0967-0637(97)00030-7 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
45 |
container_issue |
4-5 |
container_start_page |
507 |
op_container_end_page |
527 |
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1766285549536018432 |