| 1. Identificação | |
| Tipo de Referência | Artigo em Evento (Conference Proceedings) |
| Site | mtc-m12.sid.inpe.br |
| Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repositório | sid.inpe.br/iris@1912/2005/07.21.01.16 |
| Repositório de Metadados | sid.inpe.br/iris@1912/2005/07.21.01.16.22 |
| Última Atualização dos Metadados | 2018:06.05.00.40.28 (UTC) administrator |
| Chave Secundária | INPE-9636-PRE/5252 |
| Rótulo | 11373 |
| Chave de Citação | MarcioLViannaMene:2002:AnCyTh |
| Título | Annual cycle of the thermocline circulation in the Western Equatorial Atlantic as seen by altimetry  |
| Ano | 2002 |
| Data Secundária | 20021019 |
| Data de Acesso | 11 maio 2024 |
| Tipo Secundário | PRE CN |
| 2. Contextualização | |
| Autor | 1 Marcio L. Vianna, Marcio L. 2 Menezes, Viviane V. de |
| Grupo | 1 DSR-INPE-MCT-BR |
| Nome do Evento | Simpósio Brasileiro de Oceanografia, 1. |
| Localização do Evento | São Paulo |
| Data | 26-30 ago. 2002 |
| Histórico (UTC) | 2008-06-09 22:17:24 :: administrator -> jefferson :: 2010-07-07 19:06:27 :: jefferson -> administrator :: 2018-06-05 00:40:28 :: administrator -> marciana :: 2002 |
| 3. Conteúdo e estrutura | |
| É a matriz ou uma cópia? | é a matriz |
| Estágio do Conteúdo | concluido |
| Transferível | 1 |
| Tipo do Conteúdo | External Contribution |
| Palavras-Chave | OCEANOGRAFIA |
| Resumo | In two previous talks, we described: (a)a methodology by which a mixed Topex/Poseidon-ERS2 collinear sea surface height (SSH)anomaly data set was mapped into a regular 0.25 x 0.25 degree grid, summed with annual mean surface dynamic height (ref. 1000m)Boyer Levitus (1997)data, and was subsequently tested against PIRATA mooring dynamic height data; (b)a methodology to extend the linear f-plane off-equatorial slope and beta-plane equatorial curvature geostrophic formulas into a single nonlinear formulation, which was tested against cross-equatorial ADCP cruise data. The latter result confirms that the surface topography is largely related to the baroclinic structure of the upper ocean in the study region, reflecting upper thermocline variability. These two methodologies were applied to document the evolution of the annual cycle of the circulation in the western equatorial Atlantic Ocean (15N-15S; 25W-60W)based on altimeter data between May 1995-November 2000, in 10-day time steps. To this end, we separated the data into period band-limited sets by use of a mixed EOF-Singular Spectrum Analysis method. The average circulation reproduces most of the vortical structures described by Silveira et al. (1994)for the southwestern Atlantic, but suggests that Central South Equatorial Current (cSEC)recirculation cells into the Equatorial Undercurrent (EUC)may be more important than the NBC (NBUC?)retroflection at 3S. A new feature to be noted is a equatorward meridional current at 27W. In the northern hemisphere we can trace the feeding of North Equatorial Current water into the NECC and the EUC through a complex system of mergers and bifurcations near the western boundary, starting with a bifurcation of the NEC at 53W-11N, feeding a broad western boundary flow pattern (the Guiana Cndercurrent)and NBC retroflected water into the EUC, where maximum currents attain 90 cm/s. The annual variability was documented by a 10-day marching of the annual period band. To the south of 5S, the signature is always negligible (less than 4 cm/s), in agreement with findings by many previous works. The same was observed for the EUC. Between 8N-10N and 2S-5S (the cSEC)a band of zonal flows appear in phase, with maximum westward flow in May with amplitude of 10 cm/s. The strongest annual signal is related to gyre between 4N-8N that causes a strong shear region at 9N throughout the year. The gyre is anticyclonic during December-May and cyclonic during the rest of the year, when it expands eastwards, with its southern limb forming the core of the NECC. The May-July transition is very sharp, and is described in a 10-day basis. Near the Equator, a short wave pattern (500 km wavelength)dominates, with maximum amplitudes appearing during the (mixed layer)instability wave season. The whole pattern seems tobe consistent with the Stramma Schott (1999)schematics for the Central Water circulation. The interannual variability patterns were also studied, exhibiting 6cm/s signatures south of 5S, where the stationary eddies close to the western boundary suggest a change from a cyclonic anomaly in 1996 (enhancing the westward zonal flow at 12S)to a anti-cyclonic anomaly in 1997 (weakening the westward flow). |
| Área | SRE |
| Arranjo | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > Annual cycle of... |
| Conteúdo da Pasta doc | não têm arquivos |
| Conteúdo da Pasta source | não têm arquivos |
| Conteúdo da Pasta agreement | não têm arquivos |
| 4. Condições de acesso e uso | |
| Idioma | Pt |
| Grupo de Usuários | administrator |
| Visibilidade | shown |
| 5. Fontes relacionadas | |
| Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ER446E |
| Divulgação | <E> |
| Acervo Hospedeiro | sid.inpe.br/banon/2001/04.06.10.52 |
| 6. Notas | |
| Campos Vazios | affiliation archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel documentstage doi e-mailaddress edition editor electronicmailaddress format identifier isbn issn lineage mark mirrorrepository nextedition notes numberoffiles numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readergroup readpermission resumeid rightsholder schedulinginformation secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume |
| 7. Controle da descrição | |
| e-Mail (login) | marciana |
| atualizar | |