Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil
Autor(a) principal: | |
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Data de Publicação: | 1980 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Boletim do Instituto Oceanográfico |
Texto Completo: | https://www.revistas.usp.br/biocean/article/view/39874 |
Resumo: | A mesosoale study was made of the Ilha Grande area. The local circulation described through -progressive vector diagrams showed a clochwise bottom circulation determined in June 1976, while in the upper 10 m the direction of the flow entering the Ilha Grande Bay was towards the center in the west and towards the Marambaia sandbank in the east side of the Bay. Short periods and amplitude fluctuations were evaluted using power spectral analysis, Fourier and Maximum Entropy Method, which showed that in the upper 10 m predominant periods decrease from 1.1h (A = 6.3cm sec-1) (position = 3C) to 1.0h (A = 7.4 cm sec-1) (position = 2D) and increase to 5.8h (A = 6.8 cm., sec-1) (position = ID), while at the bottom layer the predominant period increases from 0.4 h (A = 5.0 cm sec-1) (position = 3G) to 6.4h (A = 7.0 cm sec-1) (position = 2G) and to 4.4h (A = 7.9 cm sec-1) (position = 1G) . From the original data it has been possible to determine an "intense pulsation" between 30-70 cm sec-1 in the upper 10 m with about 1.0h period and 10-20 min duration in all the stations. |
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Boletim do Instituto Oceanográfico |
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Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil A mesosoale study was made of the Ilha Grande area. The local circulation described through -progressive vector diagrams showed a clochwise bottom circulation determined in June 1976, while in the upper 10 m the direction of the flow entering the Ilha Grande Bay was towards the center in the west and towards the Marambaia sandbank in the east side of the Bay. Short periods and amplitude fluctuations were evaluted using power spectral analysis, Fourier and Maximum Entropy Method, which showed that in the upper 10 m predominant periods decrease from 1.1h (A = 6.3cm sec-1) (position = 3C) to 1.0h (A = 7.4 cm sec-1) (position = 2D) and increase to 5.8h (A = 6.8 cm., sec-1) (position = ID), while at the bottom layer the predominant period increases from 0.4 h (A = 5.0 cm sec-1) (position = 3G) to 6.4h (A = 7.0 cm sec-1) (position = 2G) and to 4.4h (A = 7.9 cm sec-1) (position = 1G) . From the original data it has been possible to determine an "intense pulsation" between 30-70 cm sec-1 in the upper 10 m with about 1.0h period and 10-20 min duration in all the stations. Universidade de São Paulo. Instituto Oceanográfico1980-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/biocean/article/view/3987410.1590/S0373-55241980000100007Boletim do Instituto Oceanográfico; v. 29 n. 1 (1980); 89-98 Boletim do Instituto Oceanografico; Vol. 29 No. 1 (1980); 89-98 Boletim do Instituto Oceanográfico; Vol. 29 Núm. 1 (1980); 89-98 2316-89510373-5524reponame:Boletim do Instituto Oceanográficoinstname:Instituto Oceanográfico da Universidade de São Paulo (IOUSP)instacron:USPenghttps://www.revistas.usp.br/biocean/article/view/39874/42738Ikeda, YoshimineStevenson, Merrittinfo:eu-repo/semantics/openAccess2012-08-23T13:12:21Zoai:revistas.usp.br:article/39874Revistahttps://www.revistas.usp.br/bioceanPUBhttps://www.revistas.usp.br/biocean/oaiamspires@usp.br0373-55240373-5524opendoar:2012-08-23T13:12:21Boletim do Instituto Oceanográfico - Instituto Oceanográfico da Universidade de São Paulo (IOUSP)false |
dc.title.none.fl_str_mv |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
title |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
spellingShingle |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil Ikeda, Yoshimine |
title_short |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
title_full |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
title_fullStr |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
title_full_unstemmed |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
title_sort |
Determination of circulation and short period fluctuation in Ilha Grande Bay (RJ), Brazil |
author |
Ikeda, Yoshimine |
author_facet |
Ikeda, Yoshimine Stevenson, Merritt |
author_role |
author |
author2 |
Stevenson, Merritt |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Ikeda, Yoshimine Stevenson, Merritt |
description |
A mesosoale study was made of the Ilha Grande area. The local circulation described through -progressive vector diagrams showed a clochwise bottom circulation determined in June 1976, while in the upper 10 m the direction of the flow entering the Ilha Grande Bay was towards the center in the west and towards the Marambaia sandbank in the east side of the Bay. Short periods and amplitude fluctuations were evaluted using power spectral analysis, Fourier and Maximum Entropy Method, which showed that in the upper 10 m predominant periods decrease from 1.1h (A = 6.3cm sec-1) (position = 3C) to 1.0h (A = 7.4 cm sec-1) (position = 2D) and increase to 5.8h (A = 6.8 cm., sec-1) (position = ID), while at the bottom layer the predominant period increases from 0.4 h (A = 5.0 cm sec-1) (position = 3G) to 6.4h (A = 7.0 cm sec-1) (position = 2G) and to 4.4h (A = 7.9 cm sec-1) (position = 1G) . From the original data it has been possible to determine an "intense pulsation" between 30-70 cm sec-1 in the upper 10 m with about 1.0h period and 10-20 min duration in all the stations. |
publishDate |
1980 |
dc.date.none.fl_str_mv |
1980-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/biocean/article/view/39874 10.1590/S0373-55241980000100007 |
url |
https://www.revistas.usp.br/biocean/article/view/39874 |
identifier_str_mv |
10.1590/S0373-55241980000100007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/biocean/article/view/39874/42738 |
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 |
Universidade de São Paulo. Instituto Oceanográfico |
publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto Oceanográfico |
dc.source.none.fl_str_mv |
Boletim do Instituto Oceanográfico; v. 29 n. 1 (1980); 89-98 Boletim do Instituto Oceanografico; Vol. 29 No. 1 (1980); 89-98 Boletim do Instituto Oceanográfico; Vol. 29 Núm. 1 (1980); 89-98 2316-8951 0373-5524 reponame:Boletim do Instituto Oceanográfico instname:Instituto Oceanográfico da Universidade de São Paulo (IOUSP) instacron:USP |
instname_str |
Instituto Oceanográfico da Universidade de São Paulo (IOUSP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Boletim do Instituto Oceanográfico |
collection |
Boletim do Instituto Oceanográfico |
repository.name.fl_str_mv |
Boletim do Instituto Oceanográfico - Instituto Oceanográfico da Universidade de São Paulo (IOUSP) |
repository.mail.fl_str_mv |
amspires@usp.br |
_version_ |
1797049930576035840 |