Consulta: subjectFacets:"Trade winds"
Registros recuperados: 5
Data/hora: 13/06/2024 12:17:23

Phytoplankton dynamics in the southern New Caledonian lagoon during a southeast trade winds event
Provedor de dados: 5
Autores: Neveux, Jacques; Lefebvre, Jean-pierre; Le Gendre, Romain; Dupouy, Cecile; Gallois, Francis; Courties, Claude; Gerard, Philippe; Fernandez, Jean-michel; Ouillon, Sylvain.
During the Echolag cruise (13 February-8 March 2007), the effect of 16-30 knot trade winds on abundance, community structure and dynamics of phytoplankton was investigated in the southern part of the New Caledonian coral reefs and surrounding oceanic waters. In this area, the coral reefs form two horn-like structures (hereinafter referred to as 'horn reefs'), oriented south-east, and separated by a relatively deep valley. Three repeated samplings at one week intervals of a 32 station array showed that trade winds induce surface water cooling and significant enrichment of mid- and bottom waters above the reef shelf. This enrichment appeared as the result of a general rise of the oceanic thermocline and nitracline due to the combination of trade winds and...
Tipo: Text
Palavras-chave: Chlorophyll; Phycoerythrin; Flow cytometry; Phytoplankton; In vivo fluorescence; Growth rate; Trade winds; Lagoon; Internal wave; New Caledonia.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12437/9258.pdf

Climate and pelagic fisheries in the Canary and Guinea currents 1964-1993: The role of trade winds and the southern oscillation
Provedor de dados: 5
Autores: Binet, D.
Upwellings off the coasts of western Africa provide abundant but fluctuating marine resources. Sea surface temperature and wind stress, monitored by the ship-of-opportunity observation network, are compared to fishery statistics from 1964 onwards. In the Canary Current, off Sahara and Mauritania, upwellings are mostly wind driven. In the Guinea Current, off Cote d'Ivoire and Ghana, the link with local wind is very weak. In the southern Canary Current, two wind-intensification periods occurred in the early 1970s and from 1986 onwards. On each occasion, Sardina pilchardus landings were multiplied approximately threefold. During the first event, catches of species living at the periphery of the upwelling, Sardinella, Trachurus, Decapterus and Scomber,...
Tipo: Text
Palavras-chave: Pelagic fisheries; West Africa; Trade winds; Oceanic currents; Southern Oscillation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20390/18057.pdf

Assessment of an environmental barrier to transport of ichthyoplankton from the southern to
Provedor de dados: 20
Autores: Lett, Christophe; Veitch, Jennifer; Van der Lingen, Carl D.; Hutchings, Larry.
The Lüderitz upwelling cell and Orange River cone (LUCORC) area, a transboundary region between South Africa and Namibia, is considered to be an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela upwelling ecosystems. We use environmental data and modelling to assess the potential mechanisms responsible for this barrier: environmental data were extracted from the 1 × 1° World Ocean Atlas 2001 database and used to build maps of annual mean salinity, temperature, chlorophyll, dissolved oxygen and nutrient concentrations; outputs of a regional circulation model were used in an individual-based model to assess the transport of passive particles from the southern to the northern Benguela. The data show no clear...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Upwelling; Modelling; Coastal oceanography; Trade winds; Salinity; Hydrodynamics; Cartesian coordinates; Chlorophylls.
Ano: 2007
URL: http://hdl.handle.net/1834/4667

Características oceanográficas de la surgencia frente a la Ensenada de Gaira, Departamento de Magdalena, época seca menor de 2006.
Provedor de dados: 20
Autores: Arévalo-Martínez, D.L.; Franco-Herrera, A.
Con el propósito de determinar la influencia de la dinámica del acoplamiento océano-atmósfera sobre la presencia de eventos de surgencia por transporte de Ekman y por acción de vientos continentales, así como el posible efecto de fertilización mediante el aporte de nutrientes inorgánicos de dicho proceso sobre las aguas costeras de la ensenada de Gaira, departamento de Magdalena, durante el período climático seco menor de 2006, se realizaron mediciones de variables atmosféricas, oceanográficas y biológicas, mediante la implementación del método Eureliano. En total se efectuaron cuatro muestreos, entre los cuales dos presentaron condiciones océano-atmosféricas que evidencian la ocurrencia de eventos de surgencia en las 48 horas previas, ante la presencia de...
Tipo: Journal Contribution
Palavras-chave: Upwelling; Trade winds; Nutrients (mineral); Chlorophylls; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 2008
URL: http://hdl.handle.net/1834/3504

Dinámica océano-atmosfera y su influencia en la biomasa fitoplanctónica, en la zona costera del Departamento del Magdalena, Caribe colombiano
Provedor de dados: 20
Autores: Franco-Herrera, A.; García-Hoyos, L.M.; Ramírez-Barón, J.S.; López-Cerón, D.L.
Durante los meses de febrero a junio de 2008, en las aguas costeras del departamento del  Magdalena, específicamente en las ensenadas de Gaira y Granate y en la bahía de Taganga, se realizaron seis muestreos que correspondieron a las épocas climáticas seca mayor y lluviosa menor, con el fin de detemrinar la influencia del acoplamiento océano-atmósfera sobre la intensidad de los eventos de surgencia, considerando la variabilidad fisicoquímica en la columna del agua comprendida entre los 0 y 60 mde profundidad y la respuestad e la comunidad fitoplanctónica medida en términos de clorofila a. Se evaluaron variables atomosféricas, oceanográficas y biológicas siguiendo el método Euleriano. De acuerdo a las condiciones océano-atmosféricas durante el período de...
Tipo: Journal Contribution
Palavras-chave: Upwelling; Trade winds; Nutrients (mineral); Chlorophylls; Phytoplankton; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 2010
URL: http://hdl.handle.net/1834/4020