|
|
|
| Registros recuperados: 82 | |
|
|
| Puillat, Ingrid; Lazure, Pascal; Jegou, Anne-marie; Lampert, Luis; Miller, P. |
| A synthesis of 9 years of hydrographic measurements, acquired during approximately 25 cruises (1992-2000) on the French continental shelf of the Bay of Biscay, is presented. The main focus is upon salinity distribution, as it is little known in this area. The whole of the data set covers I I months of the year, with some sampling fields repeated several times a year, for multiple years. This time-series allows temperature and salinity distributions to be studied together with their seasonal, inter-annual and mesoscale variability. The seasonal trend in temperature can be described in three stages, which are in agreement with past studies. Thermal stratification occurs between May and mid-September in a layer similar to 50 m in thickness, whereas the... |
| Tipo: Text |
Palavras-chave: Upwelling; Cold pool; River plumes; Seasonal variability; Salinity; Hydrography. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/2004/publication-779.pdf |
| |
|
|
| Prego, R; Varela, M. |
| The Artabro Gulf (1 500 km(2) north-west of the Iberian Peninsula) has been studied based on data obtained in August 1993, under typical summer meteorological conditions (COPLA 893 cruise). This is the first study on the summer hydrography of the Artabro Gulf. During this season, the hydrography of this area is quite complex and must be understood in terms of three factors: 1) upwelling, 2) two different eastern North Atlantic Central Water (ENACW) water masses and 3) rias water exchange. A local wind-induced upwelling of ENACW, (subpolar) occurs off Prior Cape. The plume is located off the gulf coastline, but inside the continental shelf. The frontal zone, rich in nutrients and chlorophyll, is parallel to the gulf line, starting in the Prior region and... |
| Tipo: Text |
Palavras-chave: Upwelling; Ria; Cap Prior; Golfe Artabre; Mer Cantabrique; Upwelling; Ria; Prior Cape; Artabro Gulf; Cantabrian Sea. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00326/43675/43196.pdf |
| |
|
| |
|
| |
|
|
| Jiménez, P.J.; Torres, S.; Alava J.J.; Samaniego, J.. |
| Durante el crucero oceanográfico realizado del 02 al 23 de abril del 2009 a bordo del BAE Orión, se realizaron observaciones de campo para conocer las especies, abundancia y distribución espacial de mamíferos marinos y aves marinas de la costa ecuatoriana e Islas Galápagos. Se realizó un total de 90 avistamientos y 11 especies confirmadas de mamíferos marinos. Entre las especies de cetáceos observadas con su tamaño promedio grupal fueron: ballena azul (Balaenoptera musculus), la ballena piloto (Globicephala macrorhynchus), el cachalote (Physeter macrocephalus), el delfín de Fraser (Lagenodelphis hosei), el delfín común (Delphinus delphis), delfín listado (Stenella coeruleoalba), el delfín manchado pantropical (Stenella attenuata) y el delfín naríz de... |
| Tipo: Journal Contribution |
Palavras-chave: Marine mammals; Marine birds; Geographical distribution; Abundance; Upwelling; Cruises. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4226 |
| |
|
|
| Tapia, M.E.; Naranjo, Ch.. |
| Se analizaron un total de 58 muestras en La Libertad y 54 muestras de agua marina costera en Manta durante el evento La Niña 1999-2000. Se elaboraron mapas de distribución de clorofila a, y la relación con los parámetros físicos y químicos. Las condiciones físicas durante el desarrollo del evento La Niña 1999-2000, no siguieron un patrón definido, sino que han presentado características particulares para cada región del Océano Pacífico Sur. En Ecuador se observó que la productividad biológica aumentó considerablemente en La Libertad durante el año 2000 existiendo la presencia de afloramientos con núcleos de clorofila a, altas concentraciones celulares e incremento de la abundancia relativa de importantes especies de diatomeas. |
| Tipo: Journal Contribution |
Palavras-chave: Chlorophylls; Biological production; Upwelling; El Nino phenomena; Marine water; Species diversity; Diatoms. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4214 |
| |
|
|
| Ramírez-Barón, J.S.; Franco-Herrera, A.; García-Hoyos, L.M.; López, D.A.. |
| Se evaluaron algunos atributos estructurales de la comunidad fitoplanctónica en las ensenadas de Granate y Gaira y bahía de Taganga, con el fin de establecer su respuesta a cambios en la dinámica oceanográfica, modulada por pulsos de surgencia y no surgencia en la zona costera del departamento del Magdalena, Caribe colombiano, en el período comprendido entre febrero-junio de 2008, correspondiente a época seca mayor y lluviosa menor. La velocidad del viento indicó la división de dos períodos febrero- abril (en presencia de surgencia: S) y junio-julio (no surgencia: NS) de 2008. Para cada período (S-NS), se identificaron en total 51-47 géneros distribuidos en 29-28 familias, correspondiendo el 78.23-86.19 % a diatomeas céntricas, el 16.68-9.47 % a diatomeas... |
| Tipo: Journal Contribution |
Palavras-chave: Phytoplankton; Upwelling; Chlorophylls; Phytoplankton; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_1577. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4018 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Stanisiere, Jean-yves; Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Gabellec, Raoul; Retho, Michael; Quinsat, Kevin; Leclerc, Emilie; Cugier, Philippe; Dussauze, Morgan; Menesguen, Alain; Dumas, Franck; Gohin, Francis; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Goubert, Evelyne; Dreano, Alain. |
| The project “Risco”, supported by the “Pôle Mer” and funded by the Regional Council of Brittany, deals with specific risks of mortality of oysters, Crassostrea gigas, cultivated on the bottom, in a subtidal bay of South Brittany : the bay of Quiberon (56, France). Massive mortalities of oysters were reported in summer 2006 in this bay, exclusively located in the deep muddy area with a positive gradient eastward. A validated biogeochemical model was applied in order to simulate the dissolved oxygen over 2000-2006 : it revealed several episodes of hypoxia, more or less intense according to years, but with the same spatial distribution. This approach proved 2006 to be the most hypoxic year since 2000. The hypoxia was due to a rare conjunction of 3 factors :... |
| Tipo: Text |
Palavras-chave: Baie Quiberon; Crassostrea gigas; Huître; Mortalité; Croissance; Hypoxie; Oxygène; Modèle; Upwelling; Loire; Vilaine; Quiberon; Crassostrea gigas; Oyster; Mortality; Growth; Hypoxia; Oxygen; Model; DEB; Upwelling; Loire; Vilaine. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00180/29131/27535.pdf |
| |
|
| |
|
|
| Anderson, L.; Maslin, M.A.; Jansen, F.; Lin, H.; Pufahl, P.K.; Pérez, M.; Brüchert, V.; Vidal, L.. |
| During Ocean Drilling Program Leg 175, 40 holes were drilled at 13 sites, and 8003 m were recovered with the aim of reconstructing the late Neogene history of the Angola-Benguela upwelling system on the southwest African margin. This system is one of the great upwelling regions of the world and is characterized by organic-rich sediments that provide an excellent record of productivity back to the middle Miocene. Understanding the sedimentology and stratigraphy of these sediments will provide important new information on the paleoceanography of this region, including the complex role the ocean plays in global carbon cycling and climate change. This contribution summarizes the sedimentologic and stratigraphic data compiled on board the JOIDES Resolution... |
| Tipo: Proceedings Paper |
Palavras-chave: Drilling; Upwelling. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/567 |
| |
|
|
| Puillat, I; Lazure, Pascal; Jegou, Anne-marie; Lampert, Luis; Miller, P. |
| On the French continental shelf of the Bay of Biscay the variability of the surface salinity distribution has been mainly investigated at the seasonal and inter-annual scales. Here, new mesoscale features such as lower-salinity lenses observed in model results are investigated by hydrological measurements acquired during 8 cruises (1997-2000). These lenses are 50-80 km wide and similar to 30 m thick and occur during westerly to northerly wind events that push offshore the less saline water of river Plumes. These water masses detached from the coast are replaced with upwelled saltier water at the coast, so coastal upwelling is often observed at the same time along Landes and southern Brittany coasts. We show that in addition to the influence of seasonal and... |
| Tipo: Text |
Palavras-chave: River plume; Upwelling; Lens; Mesoscale; Salinity. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3958.pdf |
| |
|
| |
|
| |
|
|
| Desbiolles, Fabien; Blanke, Bruno; Bentamy, Abderrahim; Grima, Nicolas. |
| Numerous studies have shown the primary importance of wind stress curl in coastal upwelling dynamics. The main goal of this new analysis is to describe the QuikSCAT surface wind stress curl at various scales in the Benguela and Canary upwelling systems. The dominant spatial pattern is characterized by cyclonic curl near continental boundaries and anticyclonic curl offshore, in association with equatorward alongshore (upwelling favorable) wind stress. At a smaller scale, we demonstrate the sensitivity of the QuikSCAT wind stress curl to coastal processes related to sea surface temperature (SST) mesoscale fluctuations by presenting a linear relationship between the curl and crosswind SST gradients. Despite the spatial and temporal sensitivity of the... |
| Tipo: Text |
Palavras-chave: Wind stress; Upwelling; SST-wind interactions. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00233/34412/32820.pdf |
| |
|
| |
|
|
| Malaize, B.; Joly, C.; Venec-peyre, M. -t.; Bassinot, F.; Caillon, N.; Charlier, K.. |
| High-resolution faunal and isotopic analyses of foraminifera were performed on core MD96-2073 (10 degrees 94'N, 52 degrees 62'E, 3142 m depth), located close to Socotra Island in the upwelling area of the Somali Basin ( NW Indian Ocean). This work focuses on Marine Isotopic Stage 6.5 in order to reconstruct paleo-upwelling changes and their links with the Arabian Sea summer monsoon and the migration of the Intertropical Convergence Zone (ITCZ). Correspondence and cluster analyses of planktonic foraminiferal abundances, partly controlled by temperature and water mass productivity, together with an upwelling intensification index, show the occurrence of a strong upwelling between 176 and 165 ka. This upwelling intensification responds to a northward... |
| Tipo: Text |
Palavras-chave: Paleoclimatology; Foraminifera; Isotopes; Indian monsoon; ITCZ; Sapropels; Upwelling. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00234/34487/33433.pdf |
| |
| Registros recuperados: 82 | |
|
|
|
