The oceanic tides in the South Atlantic Ocean
The finite element ocean tide model of Le Provost and Vincent (1986) has been applied to the simulation of the M 2 and K 1 components over the South Atlantic Ocean. The discretisation of the domain, of the order of 200 km over the deep ocean, is refined down to 15 km along the coasts, such refinemen...
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1994
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ftdoajarticles:oai:doaj.org/article:7ae5b0e4f7bc469faeee411b6d708880 2023-05-15T13:40:20+02:00 The oceanic tides in the South Atlantic Ocean M. L. Genco F. Lyard C. Le Provost 1994-08-01T00:00:00Z https://doi.org/10.1007/s00585-994-0868-8 https://doaj.org/article/7ae5b0e4f7bc469faeee411b6d708880 EN eng Copernicus Publications https://www.ann-geophys.net/12/868/1994/angeo-12-868-1994.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-994-0868-8 0992-7689 1432-0576 https://doaj.org/article/7ae5b0e4f7bc469faeee411b6d708880 Annales Geophysicae, Vol 12, Pp 868-886 (1994) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 1994 ftdoajarticles https://doi.org/10.1007/s00585-994-0868-8 2022-12-31T14:02:01Z The finite element ocean tide model of Le Provost and Vincent (1986) has been applied to the simulation of the M 2 and K 1 components over the South Atlantic Ocean. The discretisation of the domain, of the order of 200 km over the deep ocean, is refined down to 15 km along the coasts, such refinement enables wave propagation and damping over the continental shelves to be correctly solved. The marine boundary conditions, from Dakar to Natal, through the Drake passage and from South Africa to Antarctica, are deduced from in situ data and from Schwiderski's solution and then optimised following a procedure previously developed by the authors. The solutions presented are in very good agreement with in situ data: the root mean square deviations from a standard subset of 13 pelagic stations are 1.4 cm for M 2 and 0.45 cm for K 1 , which is significantly better overall than solutions published to date in the literature. Zooms of the M 2 solution are presented for the Falkland Archipelago, the Weddell Sea and the Patagonian Shelf. The first zoom allows detailing of the tidal structure around the Falklands and its interpretation in terms of a stationary trapped Kelvin wave system. The second zoom, over the Weddell Sea, reveals for the first time what must be the tidal signal under the permanent ice shelf and gives a solution over that sea which is generally in agreement with observations. The third zoom is over the complex Patagonian Shelf. This zoom illustrates the ability of the model to simulate the tides, even over this area, with a surprising level of realism, following purely hydrodynamic modelling procedures, within a global ocean tide model. Maps of maximum associated tidal currents are also given, as a first illustration of a by-product of these simulations. Article in Journal/Newspaper Antarc* Antarctica Drake Passage Ice Shelf South Atlantic Ocean Weddell Sea Directory of Open Access Journals: DOAJ Articles Weddell Sea Drake Passage Weddell Annales Geophysicae 12 9 868 886 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 M. L. Genco F. Lyard C. Le Provost The oceanic tides in the South Atlantic Ocean |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The finite element ocean tide model of Le Provost and Vincent (1986) has been applied to the simulation of the M 2 and K 1 components over the South Atlantic Ocean. The discretisation of the domain, of the order of 200 km over the deep ocean, is refined down to 15 km along the coasts, such refinement enables wave propagation and damping over the continental shelves to be correctly solved. The marine boundary conditions, from Dakar to Natal, through the Drake passage and from South Africa to Antarctica, are deduced from in situ data and from Schwiderski's solution and then optimised following a procedure previously developed by the authors. The solutions presented are in very good agreement with in situ data: the root mean square deviations from a standard subset of 13 pelagic stations are 1.4 cm for M 2 and 0.45 cm for K 1 , which is significantly better overall than solutions published to date in the literature. Zooms of the M 2 solution are presented for the Falkland Archipelago, the Weddell Sea and the Patagonian Shelf. The first zoom allows detailing of the tidal structure around the Falklands and its interpretation in terms of a stationary trapped Kelvin wave system. The second zoom, over the Weddell Sea, reveals for the first time what must be the tidal signal under the permanent ice shelf and gives a solution over that sea which is generally in agreement with observations. The third zoom is over the complex Patagonian Shelf. This zoom illustrates the ability of the model to simulate the tides, even over this area, with a surprising level of realism, following purely hydrodynamic modelling procedures, within a global ocean tide model. Maps of maximum associated tidal currents are also given, as a first illustration of a by-product of these simulations. |
format |
Article in Journal/Newspaper |
author |
M. L. Genco F. Lyard C. Le Provost |
author_facet |
M. L. Genco F. Lyard C. Le Provost |
author_sort |
M. L. Genco |
title |
The oceanic tides in the South Atlantic Ocean |
title_short |
The oceanic tides in the South Atlantic Ocean |
title_full |
The oceanic tides in the South Atlantic Ocean |
title_fullStr |
The oceanic tides in the South Atlantic Ocean |
title_full_unstemmed |
The oceanic tides in the South Atlantic Ocean |
title_sort |
oceanic tides in the south atlantic ocean |
publisher |
Copernicus Publications |
publishDate |
1994 |
url |
https://doi.org/10.1007/s00585-994-0868-8 https://doaj.org/article/7ae5b0e4f7bc469faeee411b6d708880 |
geographic |
Weddell Sea Drake Passage Weddell |
geographic_facet |
Weddell Sea Drake Passage Weddell |
genre |
Antarc* Antarctica Drake Passage Ice Shelf South Atlantic Ocean Weddell Sea |
genre_facet |
Antarc* Antarctica Drake Passage Ice Shelf South Atlantic Ocean Weddell Sea |
op_source |
Annales Geophysicae, Vol 12, Pp 868-886 (1994) |
op_relation |
https://www.ann-geophys.net/12/868/1994/angeo-12-868-1994.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-994-0868-8 0992-7689 1432-0576 https://doaj.org/article/7ae5b0e4f7bc469faeee411b6d708880 |
op_doi |
https://doi.org/10.1007/s00585-994-0868-8 |
container_title |
Annales Geophysicae |
container_volume |
12 |
container_issue |
9 |
container_start_page |
868 |
op_container_end_page |
886 |
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