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| Registros recuperados: 82 | |
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| Ndoye, S; Capet, Xavier; Estrade, Philippe; Machu, Eric; Kounta, L; Sow, B; Diakhate, M; Gayet, At. |
| The regional ocean circulation along the Southern Senegal shelf is studied using a numerical model for varying forcing fields during the upwelling season (November-May). The main objective is to study the shelf circulation of the marine environment in the Southern Senegal Upwelling Shelf (SSUS), the Lagrangian pathways by which waters are transported to the surface in the upwelling tongue and the fate of these waters. Model results are compared with hydrographic measurements during UPSEN2-ECOAO survey and satellite images datasets. The upwelling source waters and also the warm nearshore waters are analyzed, from a Lagrangian point of view, by computing the paths of particles that are passively advected by the regional ocean model velocity field (ROMS). It... |
| Tipo: Text |
Palavras-chave: Upwelling; Ocean circulation; Modeling; Coastal dynamics; Shelf; ROMS.. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00472/58346/60900.pdf |
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| Bula-Meyer, G.. |
| El presente articulo os el resultado de un estudio realizado para establecer la relación entre ciertos factores medioambien tales y la flora béntica del litoral Canbt de Colombia. Para propósito di! este estudio, esta franja costera ha sido dividida en dos Áreas. El Área 1 se encuentra entre Cabo Tiburón y la desembocadura del Rio Magdalena, estando caracterizada por aguas cálidas con muy pequeñas fluctuaciones de la temperatura del agua superficial. El Área 2 se extiende desde la desembocad tira del Rio Magdalena hasta Castilletes, y sus aguas se encuentran afectadas por una surgencía costera (Upwellmg), cuyo núcleo se localiza al oeste de la Península de la Guajira. Como resultado de este "upwelling" se presentan variaciones considerables en los... |
| Tipo: Journal Contribution |
Palavras-chave: Algae; Upwelling; Outcrops; Cold water masses; Algae; Http://aims.fao.org/aos/agrovoc/c_258. |
| Ano: 1977 |
URL: http://hdl.handle.net/1834/3897 |
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| The Benguela Current Large Marine Ecosystem (BCLME) flanks the coastal areas of Angola, Namibia and South Africa, representing a unique upwelling ecosystem. Striving to establish effective management of the BCLME, the BCLME Programme is a multi-sectoral initiative funded by the Global Environment Facility (GEF) and further financial and in-kind contributions from the three member countries. The United Nations Development Programme (UNDP) implements the Programme and the United Nations Office for Project Services (UNOPS) is the executing agency. Communities in the coastal areas of Angola, Namibia and South Africa depend on the coastal and inshore resource for their survival and livelihood and therefore have a large stake in the management of this Large... |
| Tipo: Working Paper |
Palavras-chave: Ecosystems; Upwelling. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/372 |
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| Perugachi Salamea, C.. |
| The ocean reanalysis Simple Ocean Data Assimilation (SODA) 2.2.4 is used to explore the changes in upwelling from normal conditions to either El Niño or La Niña conditions. Physical and thermodynamic variables from the reanalysis are used to explore the structure and behaviour of El Niño Southern Oscillation (ENSO) events. The results of this analysis show that sea surface temperature (SST), entrainment velocity, wind stress, mixed layer depth, wind stress curl, and heat content anomalies are in general agreement with ENSO theory. Interestingly, the distribution of upwelling based on the entrainment velocity is very patchy, which led us to explore zonal and meridional sections of vertical velocity. We used three methods to compute changes in upwelling... |
| Tipo: Journal Contribution |
Palavras-chave: Upwelling; El Nino phenomena; Surface temperature; Thermodynamics. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5754 |
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| Perugachi Salamea, C.. |
| The ocean reanalysis Simple Ocean Data Assimilation (SODA) 2.2.4 is used to explore the changes in upwelling from normal conditions to either El Niño or La Niña conditions. Physical and termodynamics variables from the reanalysis are used to explore the structure and behaviour of El Niño Southern Oscillaion (ENSO) events. The results of this analysis show that sea surface temperature (SST), entrainment velocity, wind stress, mixed layer depth, wind stress curl, and heat content anomalies are in general agreement with ENSO theory. Interestingly, the distribution of upwelling based on the entrainment velocity is very patchy, which led us to explore zonal and meridional sections of vertical velocity. We used three methods to compute changes in upwelling... |
| Tipo: Journal Contribution |
Palavras-chave: Upwelling; El Nino phenomena; Surface temperature; Thermodynamics. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5761 |
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| Ba, I.S.. |
| Résumé: Cette étude traite de la biologie et de la dynamique des populations d’anchois (Engraulis encrasicolus) des côtes mauritaniennes. Après un bref rappel des conditions climatiques et hydrobiologiques de la région, une tentative de mise en évidence de race ou population locale a montré que cette espèce pourrait être rattachée à la population méridionale atlantique du Golfe de Gascogne. En Mauritanie, l’Anchois n’est pêché que de façon accessoire. Les captures les plus abondantes sont réalisées de mai à Septembre essentiellement dans la zone nord où l’on observe un upwelling permanent. Pour évaluer la taille du stock, des estimations de biomasse par échointégration ont été effectuées, mais celles-ci n’ont pas permis de donner un ordre de grandeur... |
| Tipo: Theses and Dissertations |
Palavras-chave: Anchovy fisheries; Upwelling; Population dynamics; Mortality. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/676 |
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| Torres, G.; Calderón, T.; Calderón, G.; Franco, V.; Correa, C.. |
| El objetivo de la presente investigación, fue dar un comprensivo entendimiento de las condiciones bio-oceanográficas del fitoplancton-zooplancton-ictioplancton, y las interacciones con el medio circundante (físico, químico), procesos que son complicados cuando involucran aspectos hidrográficos costeros como áreas de afloramiento, áreas de pesca y áreas de soporte alimentario para los diferentes recursos marinos costeros planctónicos-bentónicos y aves-mamíferos marinos. |
| Tipo: Journal Contribution |
Palavras-chave: Marine ecology; Phytoplankton; Zooplankton; Ichthyoplankton; Upwelling; Biological production; Marine resources; Cruises; Oceanic islands; Coastal zone; Marine resources; Phytoplankton; Zooplankton; Biological production; Marine ecology; Http://aims.fao.org/aos/agrovoc/c_28012; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_4609. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/2318 |
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| Pérez, E.; Chalén, N.; Macías, P.. |
| During april 1995 hydrochemical research in a vertical column on the east side of the Galápagos Islands (Cruise T95/04/01) onboard of the INP R/V Tohallí indicated that concentrations of ammonium, nitrate, phosphate and chlorophyll-a were found stratified from the surface to deeper layers, on the other hand the maximum levels of nitrite and silicate were detected 70 m below the thermocline. The apparent oxygen use (AOU) varied from 1 to over 3 below the thermocline, this would indicate an oxidating environment due to the high levels of nitrate, phosphate, silicate and low concentrations of dissolved Oxygen (ca. 90-134[µM]) and ammonium (<0,1[µM]). According to the high salinity average (35,0 ups), nutritive elements (nitrate 15,6 [µM], silicate 13,1... |
| Tipo: Journal Contribution |
Palavras-chave: Chemical composition; Oceanography; Upwelling; Oceanic islands; Chemical composition; Oceanography; Http://aims.fao.org/aos/agrovoc/c_1794; Http://aims.fao.org/aos/agrovoc/c_12889. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/3021 |
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| 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 |
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| Samb, B.. |
| The marine waters off Northwest Africa are very productive because of the active upwelling that takes place at different intensities along the coast and which supports important fish resources (among which the small pelagics are the most abundant). The fishery sector plays an important role in the economies of the different countries of the region. Despite their relatively low commercial value, the pelagic fish are dominating the catches and is important to both the industrial and artisanal sectors. Several assessment studies of these resources have been carried out,and the management recommendations given calls for a control of effort in the mackerel and horsemackerel fisheries, whereas a catch level not to be exceeded has been defined for sardinella. The... |
| Tipo: Proceedings Paper |
Palavras-chave: Pelagic fish; Upwelling. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/279 |
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| Registros recuperados: 82 | |
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