Subinertial response of a density-driven eastern boundary poleward current to wind forcing
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/40968 |
Resumo: | A high-resolution primitive equation numerical model is used to generate a poleward flow along a meridionally oriented eastern boundary slope/shelf system by imposing an along-coast density gradient as the forcing mechanism. Wind forcing is applied to the resulting quasi-steady current system, and the subinertial response is analyzed. Parallel experiments with no slope-poleward flow are conducted for comparison. Moderately strong upwelling- and downwelling-favorable, week-to-month-scale wind events modify the poleward flow but do not significantly change the density-driven current structure at the slope. The alongshore transport within the slope region is reduced by 0.2–0.3 Sv (from 1.2 Sv, where Sv [ 106 m3 s21), under the influence of either downwelling or upwelling winds. Independent of the wind direction, the density-driven poleward flow always remains surface intensified. Wind-driven shelf currents develop with a considerable degree of independence from the slopepoleward circulation. On the shelf, the density field is modified by cross-shelf buoyancy advection within the boundary layers and by strong vertical mixing. The presence of the poleward flow over the slope constitutes an important factor in the behavior of the bottom boundary layer at the shelf break and for the patterns of crossslope circulation. |
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spelling |
Subinertial response of a density-driven eastern boundary poleward current to wind forcingA high-resolution primitive equation numerical model is used to generate a poleward flow along a meridionally oriented eastern boundary slope/shelf system by imposing an along-coast density gradient as the forcing mechanism. Wind forcing is applied to the resulting quasi-steady current system, and the subinertial response is analyzed. Parallel experiments with no slope-poleward flow are conducted for comparison. Moderately strong upwelling- and downwelling-favorable, week-to-month-scale wind events modify the poleward flow but do not significantly change the density-driven current structure at the slope. The alongshore transport within the slope region is reduced by 0.2–0.3 Sv (from 1.2 Sv, where Sv [ 106 m3 s21), under the influence of either downwelling or upwelling winds. Independent of the wind direction, the density-driven poleward flow always remains surface intensified. Wind-driven shelf currents develop with a considerable degree of independence from the slopepoleward circulation. On the shelf, the density field is modified by cross-shelf buoyancy advection within the boundary layers and by strong vertical mixing. The presence of the poleward flow over the slope constitutes an important factor in the behavior of the bottom boundary layer at the shelf break and for the patterns of crossslope circulation.American Meteorological Society2024-03-07T10:56:07Z2003-01-01T00:00:00Z2003info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/40968eng0022-367010.1175/2415.1Peliz, ÁlvaroDubert, JesúsHaidvogel, Dale B.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T01:46:30Zoai:ria.ua.pt:10773/40968Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:19:48.849157Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
title |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
spellingShingle |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing Peliz, Álvaro |
title_short |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
title_full |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
title_fullStr |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
title_full_unstemmed |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
title_sort |
Subinertial response of a density-driven eastern boundary poleward current to wind forcing |
author |
Peliz, Álvaro |
author_facet |
Peliz, Álvaro Dubert, Jesús Haidvogel, Dale B. |
author_role |
author |
author2 |
Dubert, Jesús Haidvogel, Dale B. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Peliz, Álvaro Dubert, Jesús Haidvogel, Dale B. |
description |
A high-resolution primitive equation numerical model is used to generate a poleward flow along a meridionally oriented eastern boundary slope/shelf system by imposing an along-coast density gradient as the forcing mechanism. Wind forcing is applied to the resulting quasi-steady current system, and the subinertial response is analyzed. Parallel experiments with no slope-poleward flow are conducted for comparison. Moderately strong upwelling- and downwelling-favorable, week-to-month-scale wind events modify the poleward flow but do not significantly change the density-driven current structure at the slope. The alongshore transport within the slope region is reduced by 0.2–0.3 Sv (from 1.2 Sv, where Sv [ 106 m3 s21), under the influence of either downwelling or upwelling winds. Independent of the wind direction, the density-driven poleward flow always remains surface intensified. Wind-driven shelf currents develop with a considerable degree of independence from the slopepoleward circulation. On the shelf, the density field is modified by cross-shelf buoyancy advection within the boundary layers and by strong vertical mixing. The presence of the poleward flow over the slope constitutes an important factor in the behavior of the bottom boundary layer at the shelf break and for the patterns of crossslope circulation. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01T00:00:00Z 2003 2024-03-07T10:56:07Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/40968 |
url |
http://hdl.handle.net/10773/40968 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0022-3670 10.1175/2415.1 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
American Meteorological Society |
publisher.none.fl_str_mv |
American Meteorological Society |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137840636887040 |