Numerical modeling of the Patos Lagoon coastal plume
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da FURG (RI FURG) |
Texto Completo: | http://repositorio.furg.br/handle/1/942 |
Resumo: | The Southern Brazilian Shelf (SBS) is a freshwater-influenced region, but studies on the dynamics of coastal plumes are sparse and lack in space-time resolution. Studies on the dynamics of the Patos Lagoon plume are even more limited. The aim of this paper is to investigate the influence of the principal physical forcing for the formation and behavior of the Patos Lagoon coastal plume. The study is carried out through 3D numerical modeling experiments and empirical orthogonal function (EOF) analysis. Results showed that the amount of freshwater is the principal physical forcing controlling the plume formation. The Coriolis effect enhances the northward transport over the shelf, while the tidal effects contribute to intensify horizontal and vertical mixing, which are responsible for spreading the freshwater over the shelf. The wind effect, on the other hand, is the main mechanism controlling the behavior of the Patos Lagoon coastal plume over the inner SBS in synoptic time scales. Southeasterly and southwesterly winds contribute to the northeastward displacement of the plume, breaking the vertical stratification of the inner continental shelf. Northeasterly and northwesterly winds favor ebb conditions in the Patos Lagoon, contributing to the southwestward displacement of the plume enhancing the vertical stratification along and across-shore. The EOF analysis reveals two modes controlling the variability of the plume on the surface. The first mode (explaining 70% of the variability) is associated to the southwestward transportation of the plume due to the dominance of north quadrant winds, while the second mode (explaining 19% of the variability) is associated to the intermittent migration of the plume northeastward due to the passage of frontal systems over the area. Large scale plumes can be expected during winter and spring months, and are enhanced during El Nin˜o events. |
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Numerical modeling of the Patos Lagoon coastal plumeCoastal plumeSouthern Brazilian shelfFreshwaterNumerical modelingEOF analysisThe Southern Brazilian Shelf (SBS) is a freshwater-influenced region, but studies on the dynamics of coastal plumes are sparse and lack in space-time resolution. Studies on the dynamics of the Patos Lagoon plume are even more limited. The aim of this paper is to investigate the influence of the principal physical forcing for the formation and behavior of the Patos Lagoon coastal plume. The study is carried out through 3D numerical modeling experiments and empirical orthogonal function (EOF) analysis. Results showed that the amount of freshwater is the principal physical forcing controlling the plume formation. The Coriolis effect enhances the northward transport over the shelf, while the tidal effects contribute to intensify horizontal and vertical mixing, which are responsible for spreading the freshwater over the shelf. The wind effect, on the other hand, is the main mechanism controlling the behavior of the Patos Lagoon coastal plume over the inner SBS in synoptic time scales. Southeasterly and southwesterly winds contribute to the northeastward displacement of the plume, breaking the vertical stratification of the inner continental shelf. Northeasterly and northwesterly winds favor ebb conditions in the Patos Lagoon, contributing to the southwestward displacement of the plume enhancing the vertical stratification along and across-shore. The EOF analysis reveals two modes controlling the variability of the plume on the surface. The first mode (explaining 70% of the variability) is associated to the southwestward transportation of the plume due to the dominance of north quadrant winds, while the second mode (explaining 19% of the variability) is associated to the intermittent migration of the plume northeastward due to the passage of frontal systems over the area. Large scale plumes can be expected during winter and spring months, and are enhanced during El Nin˜o events.2011-08-30T17:07:45Z2011-08-30T17:07:45Z2008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfMARQUES, W. C. et al. Numerical modeling of the Patos Lagoon coastal plume. Continental Shelf Research, Brazil, v. 29, p. 556-571, 2009. Disponível em: <http://www.sciencedirect.com.ez40.periodicos.capes.gov.br/science?_ob=MImg&_imagekey=B6VBJ-4TRCYK9-1-15&_cdi=5928&_user=923856&_pii=S0278434308003166&_origin=browse&_zone=rslt_list_item&_coverDate=03%2F01%2F2009&_sk=999709996&wchp=dGLbVlz-zSkWB&md5=c03dc24cb29d200e38426775eca61069&ie=/sdarticle.pdf> Acesso em: 28 ago. 2011.0278-4343http://repositorio.furg.br/handle/1/94210.1016/j.csr.2008.09.022engMarques, Wiliam CorreaFernandes, Elisa Helena LeãoMonteiro, Igor OliveiraMöller Junior, Osmar Olintoinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2023-01-17T13:21:32Zoai:repositorio.furg.br:1/942Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2023-01-17T13:21:32Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false |
dc.title.none.fl_str_mv |
Numerical modeling of the Patos Lagoon coastal plume |
title |
Numerical modeling of the Patos Lagoon coastal plume |
spellingShingle |
Numerical modeling of the Patos Lagoon coastal plume Marques, Wiliam Correa Coastal plume Southern Brazilian shelf Freshwater Numerical modeling EOF analysis |
title_short |
Numerical modeling of the Patos Lagoon coastal plume |
title_full |
Numerical modeling of the Patos Lagoon coastal plume |
title_fullStr |
Numerical modeling of the Patos Lagoon coastal plume |
title_full_unstemmed |
Numerical modeling of the Patos Lagoon coastal plume |
title_sort |
Numerical modeling of the Patos Lagoon coastal plume |
author |
Marques, Wiliam Correa |
author_facet |
Marques, Wiliam Correa Fernandes, Elisa Helena Leão Monteiro, Igor Oliveira Möller Junior, Osmar Olinto |
author_role |
author |
author2 |
Fernandes, Elisa Helena Leão Monteiro, Igor Oliveira Möller Junior, Osmar Olinto |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Marques, Wiliam Correa Fernandes, Elisa Helena Leão Monteiro, Igor Oliveira Möller Junior, Osmar Olinto |
dc.subject.por.fl_str_mv |
Coastal plume Southern Brazilian shelf Freshwater Numerical modeling EOF analysis |
topic |
Coastal plume Southern Brazilian shelf Freshwater Numerical modeling EOF analysis |
description |
The Southern Brazilian Shelf (SBS) is a freshwater-influenced region, but studies on the dynamics of coastal plumes are sparse and lack in space-time resolution. Studies on the dynamics of the Patos Lagoon plume are even more limited. The aim of this paper is to investigate the influence of the principal physical forcing for the formation and behavior of the Patos Lagoon coastal plume. The study is carried out through 3D numerical modeling experiments and empirical orthogonal function (EOF) analysis. Results showed that the amount of freshwater is the principal physical forcing controlling the plume formation. The Coriolis effect enhances the northward transport over the shelf, while the tidal effects contribute to intensify horizontal and vertical mixing, which are responsible for spreading the freshwater over the shelf. The wind effect, on the other hand, is the main mechanism controlling the behavior of the Patos Lagoon coastal plume over the inner SBS in synoptic time scales. Southeasterly and southwesterly winds contribute to the northeastward displacement of the plume, breaking the vertical stratification of the inner continental shelf. Northeasterly and northwesterly winds favor ebb conditions in the Patos Lagoon, contributing to the southwestward displacement of the plume enhancing the vertical stratification along and across-shore. The EOF analysis reveals two modes controlling the variability of the plume on the surface. The first mode (explaining 70% of the variability) is associated to the southwestward transportation of the plume due to the dominance of north quadrant winds, while the second mode (explaining 19% of the variability) is associated to the intermittent migration of the plume northeastward due to the passage of frontal systems over the area. Large scale plumes can be expected during winter and spring months, and are enhanced during El Nin˜o events. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 2011-08-30T17:07:45Z 2011-08-30T17:07:45Z |
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 |
MARQUES, W. C. et al. Numerical modeling of the Patos Lagoon coastal plume. Continental Shelf Research, Brazil, v. 29, p. 556-571, 2009. Disponível em: <http://www.sciencedirect.com.ez40.periodicos.capes.gov.br/science?_ob=MImg&_imagekey=B6VBJ-4TRCYK9-1-15&_cdi=5928&_user=923856&_pii=S0278434308003166&_origin=browse&_zone=rslt_list_item&_coverDate=03%2F01%2F2009&_sk=999709996&wchp=dGLbVlz-zSkWB&md5=c03dc24cb29d200e38426775eca61069&ie=/sdarticle.pdf> Acesso em: 28 ago. 2011. 0278-4343 http://repositorio.furg.br/handle/1/942 10.1016/j.csr.2008.09.022 |
identifier_str_mv |
MARQUES, W. C. et al. Numerical modeling of the Patos Lagoon coastal plume. Continental Shelf Research, Brazil, v. 29, p. 556-571, 2009. Disponível em: <http://www.sciencedirect.com.ez40.periodicos.capes.gov.br/science?_ob=MImg&_imagekey=B6VBJ-4TRCYK9-1-15&_cdi=5928&_user=923856&_pii=S0278434308003166&_origin=browse&_zone=rslt_list_item&_coverDate=03%2F01%2F2009&_sk=999709996&wchp=dGLbVlz-zSkWB&md5=c03dc24cb29d200e38426775eca61069&ie=/sdarticle.pdf> Acesso em: 28 ago. 2011. 0278-4343 10.1016/j.csr.2008.09.022 |
url |
http://repositorio.furg.br/handle/1/942 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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.source.none.fl_str_mv |
reponame:Repositório Institucional da FURG (RI FURG) instname:Universidade Federal do Rio Grande (FURG) instacron:FURG |
instname_str |
Universidade Federal do Rio Grande (FURG) |
instacron_str |
FURG |
institution |
FURG |
reponame_str |
Repositório Institucional da FURG (RI FURG) |
collection |
Repositório Institucional da FURG (RI FURG) |
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Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG) |
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