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	Provedor de dados ArchiMer (4) Autor Roy, Claude (2) Bertrand, P (1) Cambon, Gildas (1) Colin De Verdiere, Alain (1) Crespin, J. (1) Crosta, X. (1) Emeis, K (1) Giraudeau, J (1) Herbette, Steven (1) Kim, J. -h. (1) Largier, John (1) Martinez, P (1) Penven, Pierrick (1) Pichevin, L (1) Pichevin, L. (1) Ragoasha, Natalie (1) Reason, Chris (1) Romero, O. E. (1) Schneider, R (1) Veitch, Jennifer (1) Mais... Palavra-chave Benguela (4) Alongshore connectivity (1) Cape effects (1) Climatic cycles (1) Coastal jet (1) Diatoms (1) Effets de cap (1) Lagrangian pathways (1) Millennial and submillennial time scale (1) Modeling (1) Modélisation (1) Nitrogen cycling (1) Poleward undercurrent (1) Productivity (1) Recruitment (1) Recrutement (1) Retention (1) Rétention (1) SW Atlantic (1) Sea-surface temperature (1) Mais... Tipo do documento Text (4) Ano 2019 (1) 2015 (1) 2005 (1) 2000 (1) País France (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Simulation of a coastal jet retention process using a barotropic model ArchiMer Penven, Pierrick; Roy, Claude; Colin De Verdiere, Alain; Largier, John. In the southern Benguela, sardine and anchovy spawn on the Western Agulhas Bank. Eggs and larvae are transported to the West coast nursery ground by a! coastal current. Once the larvae reach the West coast, retention within the favorable coastal domain is key to larvae survival and recruitment. The Cape Columbine-St Helena Bay area is the main nursery ground along the West Coast. In this area, the interaction between upwelling and topography results in the formation of an upwelling plume. The plume, and the associated circulation patterns, is thought to be the mechanism providing retention within the coastal domain. The dynamics of the plume are studied using a set of:numerical experiments. It is shown that an equatorward wind forcing produces a cyclonic... Tipo: Text Palavras-chave: Benguela; Effets de cap; Modélisation; Rétention; Recrutement; Benguela; Cape effects; Modeling; Retention; Recruitment. Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43385/42826.pdf Nitrogen cycling on the Namibian shelf and slope over the last two climatic cycles: Local and global forcings ArchiMer Pichevin, L; Martinez, P; Bertrand, P; Schneider, R; Giraudeau, J; Emeis, K. In the light of new surface sediment delta(15)N data collected over the Namibian shelf and slope, we examined glacial-interglacial variations of N inventory in the area of Luderitz (25 degrees 6S) by deciphering delta(15)N signals of three cores distributed from the upper to the lower continental slope. The lower slope cores display low delta(15)N during cold periods and high delta(15)N during climatic optima, akin to many other records from the world ocean, whereas the upper slope core displays a high-frequency low-amplitude delta(15)N signal without obvious glacial-interglacial variability. This dissimilarity results from the segregation of the upwelling structure in two cells, decoupling nutrient dynamics of the shelf from those beyond the shelf-edge.... Tipo: Text Palavras-chave: Nitrogen cycling; Benguela; Climatic cycles. Ano: 2005 URL: https://archimer.ifremer.fr/doc/00232/34366/32796.pdf Lagrangian pathways in the southern Benguela upwelling system ArchiMer Ragoasha, Natalie; Herbette, Steven; Cambon, Gildas; Veitch, Jennifer; Reason, Chris; Roy, Claude. The effect of ocean currents on fish eggs and larvae during their journey from spawning to nursery grounds in the Southern Benguela upwelling system is poorly understood. The survival and successful transport of fish eggs and larvae results from complex biological and physical processes. This study focuses on the advective processes, more specifically on how the dynamics and characteristics of the ocean currents shape the Lagrangian pathways in the Southern Benguela. A mesoscale eddy resolving interannual (1989–2010) simulation of the region, with a horizontal resolution of 7.5 km, is used to study processes impacting the connectivity between the western edge of the Agulhas Bank and the west coast upwelling region. A set of Lagrangian experiments are... Tipo: Text Palavras-chave: Benguela; Upwelling; Alongshore connectivity; Lagrangian pathways; Coastal jet; Poleward undercurrent. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00487/59904/63085.pdf Rapid longitudinal migrations of the filament front off Namibia (SE Atlantic) during the past 70kyr ArchiMer Romero, O. E.; Crosta, X.; Kim, J. -h.; Pichevin, L.; Crespin, J.. Although productivity variations in coastal upwelling areas are mostly attributed to changes in wind strength, productivity dynamics in the Benguela Upwelling System (BUS) is less straightforward due to its complex atmospheric and hydrographic settings. In view of these settings, past productivity variations in the BUS can be better investigated with downcore sediments representing different productivity regimes. In this study, two sediment cores retrieved at ca. 25°–26°S in the BUS and representing different productivity regimes were studied. By using micropaleontological, geochemical and temperature proxies measured on core MD96-2098, recovered at 2910 m water depth in the bathypelagic zone at 26°S off Namibia, variations of filament front location,... Tipo: Text Palavras-chave: Benguela; Diatoms; Millennial and submillennial time scale; Productivity; Sea-surface temperature; SW Atlantic; Upwelling filaments. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00294/40499/39432.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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