Campo DC | Valor | Idioma |
dc.contributor.author | Araujo, M. | - |
dc.contributor.author | Limongi, C. | - |
dc.contributor.author | Servain, J. | - |
dc.contributor.author | Silva, M. | - |
dc.contributor.author | Leite, F. S. | - |
dc.contributor.author | Veleda, D. | - |
dc.contributor.author | Lentini, Carlos Alessandre Domingos | - |
dc.creator | Araujo, M. | - |
dc.creator | Limongi, C. | - |
dc.creator | Servain, J. | - |
dc.creator | Silva, M. | - |
dc.creator | Leite, F. S. | - |
dc.creator | Veleda, D. | - |
dc.creator | Lentini, Carlos Alessandre Domingos | - |
dc.date.accessioned | 2012-03-29T13:56:50Z | - |
dc.date.available | 2012-03-29T13:56:50Z | - |
dc.date.issued | 2011 | - |
dc.identifier.issn | 1812-0784 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/5574 | - |
dc.description | p. 63-73. | pt_BR |
dc.description.abstract | High-resolution hydrographic observations of
temperature and salinity are used to analyze the formation and distribution of isothermal depth (ZT), mixed depth (ZM) and barrier layer thickness (BLT) in a section of the southwestern Atlantic (0º30´N–14°OO`S; 31 240–41 480 W), adjacent to the northeastern Brazilian coast. Analyzed data
consists of 279 CTD casts acquired during two cruises under the Brazilian REVIZEE Program. One occurred in late
austral winter (August–October 1995) and another in austral summer (January–April 1997). Oceanic observations are
compared to numerical modeling results obtained from the French Mercator-Coriolis Program. Results indicate that the
intrusion of subtropical Salinity MaximumWaters (SMW) is the major process contributing to the seasonal barrier layer
formation. These waters are brought by the South Equatorial Current (SEC), from the subtropical region, into the western
tropical Atlantic boundary. During late austral winter southeastern trade winds are more intense and ITCZ precipitations
induce lower surface salinity values near the equator. During this period a 5–90m thick BLT (median=15 m) is observed
and BLT>30m is restricted to latitudes higher than 8 S, where the intrusion of salty waters between 8 –12.3 Screates shallow mixed layers over deep (ZT 90 m) isothermal layers. During austral summer, shallow isothermal and mixed layers prevail, when northeasterly winds are predominant
and evaporation overcomes precipitation, causing saltier waters at the surface/subsurface layers. During that period
observed BLT varies from 5 to 70m and presents thicker median value of 35 m, when comparing to the winter. Furthermore,
BLT 30m is observed not only in the southernmost part of the study area, as verified during late winter, but in the
latitude range 2 –14 S, where near-surface salty waters are
transported westward by the SEC flow. These results indicate that the inclusion of salinity dynamics and its variability
are necessary for studying mixed and barrier layer behaviors in the tropical Atlantic, where ocean-atmosphere coupling is
known to be stronger. | pt_BR |
dc.language.iso | en | pt_BR |
dc.source | DOI: 10.5194/os-7-63-2011 | pt_BR |
dc.title | Salinity-induced mixed and barrier layers in the southwestern tropical Atlantic Ocean off the northeast of Brazil | pt_BR |
dc.title.alternative | Ocean Science | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | v. 7, n. 1 | pt_BR |
Aparece nas coleções: | Artigo Publicado em Periódico (Biologia)
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