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Registros recuperados: 33
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A hydrographic section from South Africa to the southern limit of the Antarctic Circumpolar Current at the Greenwich meridian ArchiMer
Gladyshev, S; Arhan, Michel; Sokov, A; Speich, Sabrina.
The properties and circulation of water masses leaving and entering the Atlantic Ocean south of Africa are examined using data from a hydrographic and Lowered acoustic Doppler current profiler section from South Africa to the southern limit of the Antarctic Circumpolar Current (ACC). At the upper levels, the ACC fronts are well determined using either classical water mass definitions or gradient-based criteria. While the locations of the Subantarctic Front (SAF), Polar Front (PF), and Southern ACC Front (SACCF) seem controlled by the neighbouring ridges, that of the Subtropical Front (STF) is much influenced in this region (similar to 10 degrees E) by northwestward propagating Agulhas rings. No large amount of Subantarctic Mode Water (SAMW) is observed,...
Tipo: Text Palavras-chave: Water masses; Fronts; Bottom circulation; Transport; Agulhas eddies; Antarctic Circumpolar Current.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6097.pdf
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Algunas características del florecimiento del fitoplancton en el frente del Río de la Plata. I. Los sistemas nutritivos OceanDocs
Negri, R.M.; Carreto, J.I.; Benavides, H.R..
During the spring (H-04/82: october 11-27, 1982)carried out by the Fishery Research Vessel "Dr.E.Holmberg", the distribution of temperature, salinity, nutrients concentration and photosynthetic pigments were studied at the "Rio de la Plata" maritime front. The presence of Sub-Tropical coastal waters in only station did not allow its characterization. Low Chlorophyll a concentration were noted, in association with scarce concentrations of nutrients and high Margalef index values.
Tipo: Journal Contribution Palavras-chave: Phytoplankton; Abiotic factors; Water masses; Phosphates; Silicates; Nitrates; Chlorophylls; Estuarine front; Phytoplankton; Nitrates; Nutrients; Phosphates; Silicates; Chlorophylls.
Ano: 1986 URL: http://hdl.handle.net/1834/2041
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Application of Argo Data in the Analysis of Water Masses in the Northwest Pacific Ocean. OceanDocs
Sun, Chaohui; Xu, Jianping; Liu, Zenghong; Tong, Mingrong; Zhu, Bokang.
The temperature and salinity distributions, and the water mass structures in Northwest Pacific Ocean are studied using the temperature and salinity data obtained by Argo profiling floats. The T-S relation in this region indicates there exist 8 water masses,they are the North Pacific Tropical Surface Water (NPTSW), North P, acific Subsurface Water (NPSSW),North Pacific Intermediate Water (NPIW),North Pacific Subtropical Water (NPSTW), North Pacific Deep Water (NPDW) and Equatorial Surface Water (ESW), and the South Pacific Subsurface Water (SPSSW) and South Pacific Intermediate Water (SPIW).
Tipo: Journal Contribution Palavras-chave: Water masses.
Ano: 2008 URL: http://hdl.handle.net/1834/5875
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Approche de la circulation residuelle en Baie de Seine ArchiMer
Lehir, P; Salomon, J; Leprovost, C; Chabertd'Hieres, G; Mauvais, J.
By taking into account salinity measurements and consequently mean residence time, current measurements, tidal computation with a 2-D model and wind induced currents provided by a 3-D model, a global diagram of residual flow in Seine Bay is given. Main patterns are exhibited: density currents in the eastern part of the bay, off the Seine Estuary, wind induced circulation, especially along the coast and over the Channels, and tidal residual patterns induced by topography.
Tipo: Text Palavras-chave: Simulation; Modelling; Wind driven circulation; Bottom topography; Density gradients; Water masses; River discharge; Haline circulation; Salinity gradients; Tidal currents; Residual flow.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1263.pdf
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Areas de mayor productividad biológica (clorofila "a") en el Pacífico Ecuatorial (82°W-92°W) durante 1988-1999 y su relación con eventos El Niño OceanDocs
Torres, G..
El objetivo de la presente investigación, fue diagnosticar las áreas de mayor productividad biológica en base a Clorofila "a" superficial y subsuperficial, durante la década 1989-1999 para la región del Pacífico Tropical (Ecuador).
Tipo: Journal Contribution Palavras-chave: Biological production; Chlorophylls; Upwelling; Biomass; Water masses; Nutrients (mineral); El Nino phenomena; Cruises; Biological production; Biomass; Chlorophylls.
Ano: 2006 URL: http://hdl.handle.net/1834/2302
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Caractérisation de la circulation autour, au-dessus et à travers (via des zones de fracture) la dorsale de Reykjanes ArchiMer
Petit, Tillys.
The Reykjanes Ridge is a major topographic feature of the North-Atlantic Ocean that extends from Iceland to the Charlie Gibbs Fracture Zone. Located between the Iceland Basin and the Irminger Sea, the Reykjanes Ridge strongly influences the subpolar gyre circulation and is a gate toward the deep convection areas. However, the circulation and distribution across the Reykjanes Ridge has never been directly quantified such that the characterization of the connection between the Iceland Basin and the Irminger Sea is still incomplete. As part of the Reykjanes Ridge Experiment project, we were able to analyze the circulation around, above and across the Reykjanes Ridge. Mainly based on hydrographic sections along and perpendicular to the ridge axis, the aim of...
Tipo: Text Palavras-chave: Gyre subpolaire Nord-Atlantique; Bathymétrie; Masses d’eau; North-Atlantic; Subpolar gyre; Bathymetry; Water masses; Circulation; Observations.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00498/60969/64377.pdf
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Características oceanográficas en Isla Malpelo y su relación con la Cuenca Oceánica del Pacífico Colombiano OceanDocs
Rodríguez Rubio, E.; Giraldo, A..
La isla Malpelo conforma la ecorregión insular del Pacífico colombiano y contiene un mosaico de ecosistemas terrestres, litorales y submareales únicos. Considerando su carácter insular es de esperar que las características oceanográficas en esta localidad se encuentren influenciadas por la dinámica física y química del Pacífico Oriental Tropical (POT), siendo moduladas por las condiciones propias de la Cuenca Oceánica del Pacífico Colombiano (COPC). En este trabajo, se utilizó información in situ para describir las condiciones termohalinas de la columna de agua en la isla Malpelo e identificar las masas de agua dominantes durante los dos períodos hidroclimatológicos característicos de la COPC. Adicionalmente, se analizó la variabilidad térmica y halina en...
Tipo: Journal Contribution Palavras-chave: Oceanography; Water masses.
Ano: 2011 URL: http://hdl.handle.net/1834/4388
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Características químicas de las masas de agua costeras ecuatorianas en estaciones fijas: Península de Santa Elena y Puerto de Manta-Ecuador. 1990-1995 OceanDocs
Valencia, M.; Rodríguez de Morán, A..
El objeto de obtener información mensual de las características Físico-Químico-Biológicas de la columna de agua y establecer las condiciones oceanográficas de la zona durante los años en que no se presenta el evento y, en base de éstas, detectar los cambios o variaciones que se producen cuando aparece un proceso de esta naturaleza, a fin de, eventualmente, coadyuvar a la realización de predicciones, a corto o mediano plazo de la aparición de "EL NIÑO".
Tipo: Journal Contribution Palavras-chave: Chemical oceanography; Water masses; Chemical oceanography; Http://aims.fao.org/aos/agrovoc/c_1516.
Ano: 1996 URL: http://hdl.handle.net/1834/2183
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Características químicas de las masas de aguas costeras ecuatorianas, durante el evento "La Niña" 1999-2000 OceanDocs
Carrillo, P..
El objective of this article was to show the impact of a cold phenomenon such as "La Niña" during a multi-year period. The study was conducted by measuring the chemical characteristics of masses of water and comparing them to the characteristics shown in 2000 where the activity of this phenomenon was the strongest. The masses of water were located based on their characterization with parameters such as temperature, salinity, dissolved oxygen and inorganic micronutrients (phosphates, silicates, nitrites, and nitrates). These parameters were measured in 1994, a year considered as normal activity and in those years where "La Niña" was observed with greater intensity. The masses of water ATS, AES, ACP, AESS were established during the years of analysis. The...
Tipo: Journal Contribution Palavras-chave: Water masses; El Nino phenomena; Nutrients (mineral); Fixed stations.
Ano: 2013 URL: http://hdl.handle.net/1834/5750
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Características químicas de las masas de aguas costeras ecuatorianas durante los eventos ENSO de 1993-1998 OceanDocs
de Morán, A.R.; Valencia, M.; de Ordóñez, C.P..
El objetivo del presente es coadyuvar al conocimiento de la génesis y evolución del evento El Niño mediante la determinación de las características hidroquímicas de las masas de agua presentes en los eventos de 1993, considerado de moderada intensidad, de 1998, de gran intensidad; comparándolas con 1994, año considerado normal, utilizando para ello la información obtenida en cruceros del B/ORION realizados en los meses de Marzo de los años citados y tomando como área de estudio, por su coincidencia espacio-temporal las transectas comprendidas entre los meriadianos 82 y 83°30' de longitud oeste.
Tipo: Journal Contribution Palavras-chave: Chemical oceanography; Water masses; Nutrients (mineral); Temperature; Dissolved oxygen; El Nino phenomena; Dissolved oxygen; Chemical oceanography; Temperature.
Ano: 1998 URL: http://hdl.handle.net/1834/2551
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Contribución al conocimiento de la oceanografía física del Estrecho Bransfield OceanDocs
Zambrano Q., E.; Cardin, V..
Durante el verano austral de 1988, el Ecuador realizó la Primera Expedición Científica a la Antártica abordo del buque oceanográfico ORION. Se investigó en detalle el Estrecho Bransfiel realizándose un total de 23 estaciones oceanográficas, en las que se tomó información desde la superficie hasta los 500 m. de profundidad, obteniéndose datos de temperatura y salinidad, además de parámetros químicos y bilógicos. En este trabajo se presenta una descripción de las condiciones oceanográficas predominantes durante las fechas del muestreo así como la estructura termohalina del estrecho; mediante el uso de diagramas T-S se identificaron las masas de agua presentes en la región. Del análisis de la topografía dinámica se deduce que la circulación es hacia NE y, en...
Tipo: Journal Contribution Palavras-chave: Temperature; Salinity; Water masses; Thermohaline circulation; Dynamic topography; Oceanographic stations; Physical oceanography; Physical oceanography; Temperature; Salinity.
Ano: 1989 URL: http://hdl.handle.net/1834/3826
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Development and Application of the GIS-Based Water Mass Analysis Integrated System. OceanDocs
Zhang, Yuexia; MIao, Zhenqing; Yan, Shiqiang.
The research on water masses is always one important facet of Oceanography. I adopt the method of Fuzzy Density Clustering to analyse water masses. Meanwhile, I use Visual Basic 6.0 as developing platform and utilize the MapX components to develop the platform of GIS. By integrating the Water Masses Model compiled by FORTRAN language, and GIS using Tight Coupling, I develop an Integrated System. That makes all phases are finished in one condition, including the gain of computing grid, the pick-up and analysis of data, the choice of parameters and resetting, the computing of model, and the result’s visualization. It improves the efficiency of the data analysis and decision-making. Finally, this system is applied in the Zhoushan fishing ground and adjacent...
Tipo: Journal Contribution Palavras-chave: Water masses; GIS; Models.
Ano: 2008 URL: http://hdl.handle.net/1834/5877
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Especies planctónicas marinas como bioindicadoras de masas de agua frente a la costa ecuatoriana durante el evento El Niño 2009-2010 OceanDocs
Cruz, M.; Tapia, M.E.; Naranjo, Ch..
Con la finalidad de determinar la influencia del evento El Niño 2009-2010 que se dsarrolló en elas regiones Niño 1+2 y 3.4, en base a los organismos indicadores de masas de aguas para determinar la intensidad y efectos en la costa ecuatoriana, se utilizaron cinco grupos de organismos planctónicos: Diatomeas, Dinoflagelados, Quetognatos, Pterópodos, Heterópodos y las concentraciones de clorofila a antes, durante y después del evento El Niño 2009-2010. En el primer trimestre del 2009 se registró una alta producción primaria, mientras que desde septiembre a noviembre se observó la más baja productividad del mar, en las estaciones fijas La Libertad como en Manta.En la estación fija de La Libertad, durante todo el 2009 predominaron especies de fitoplancton que...
Tipo: Journal Contribution Palavras-chave: Phytoplankton; Zooplankton; Indicator species; Diatoms; Primary production; El Nino phenomena; Water masses.
Ano: 2010 URL: http://hdl.handle.net/1834/4213
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Estudio numérico de circulación océanica sobre la plataforma continental argentina OceanDocs
Sitz, L.E..
This dissertation analyses the barotropic and baroclinic response of the Argentinean Continental Shelf to different forcing using a three-dimensional numerical ocean model. The study aims towards a systematical exploration of the physical processes that control the circulation. To facilitate the dynamical understanding of the results our experimental strategy was to start with a three dimensional barotropic model (constant density) that examines the influence of winds and tides, and to progress to a more complex case including density stratification (baroclinic model). It was found that the average annual circulation, forced only by the wind, shows a strong contrast between the northern and southern region of the study area. A detailed analysis...
Tipo: Theses and Dissertations Palavras-chave: Numerical analysis; Water masses; Mathematical models; Physical oceanography; Current data; Tides; Winds; Ocean circulation; Physical oceanography; Tides; Winds; Mathematical models.
Ano: 2009 URL: http://hdl.handle.net/1834/3878
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Estudio químico de las masas de aguas del Pacífico Sudeste (Ruta Guayaquil-Valparaíso), durante un período del evento "El Niño" 1997-1998 OceanDocs
Burgos, L..
Durante la séptima expedición Ecuatoriana a la Antártida (diciembre, 1997 y Marzo, 1998), a bordo del B/I ORION, se realizó investigación oceanográfica en el trayecto Guayaquil-Valparaíso, los días 11 al 19 de diciembre, se colectaron muestras de agua en 14 estaciones para el análisis de nutrientes, oxígeno, temperatura, salinidad, y parámetros biológicos además se recolectó información meteorológica. La información química obtenida de nutriente (Nitrato, silicato y fosfato) y oxígeno disuelto fue relacionada con la temperatura y correlacionada con los diagramas T/S en el ámbito de estudio. Se elaboraron gráficos de nutriente y oxígeno con las masas de agua, estableciendo rangos asociados a cada masa de agua previamente identificada en los diagramas T/S....
Tipo: Journal Contribution Palavras-chave: Chemical oceanography; Water masses; El Nino phenomena; Nutrients (mineral); T/S diagrams; Water temperature; Salinity; Meteorological data; Dissolved oxygen; Cruises; Water temperature; Dissolved oxygen; Chemical oceanography; Salinity; Meteorological data; Http://aims.fao.org/aos/agrovoc/c_16063; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_34149.
Ano: 1998 URL: http://hdl.handle.net/1834/2196
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First direct estimates of volume and water mass transports across the Reykjanes Ridge ArchiMer
Petit, Tillys; Mercier, Herle; Thierry, Virginie.
The Reykjanes Ridge is a major topographic feature located south of Iceland in the North‐Atlantic Ocean that strongly influences the subpolar gyre (SPG) circulation. Based on velocity and hydrographic measurements carried out along the crest of the Reykjanes Ridge from the Icelandic continental shelf to 50°N during the RREX cruise in June – July 2015, we derived the first direct estimates of volume and water mass transports over the Reykjanes Ridge. North of 53.15°N, circulation was mainly westward; south of this latitude it was mainly eastward. The westward transport was estimated at 21.9 ± 2.5 Sv (Sv = 106 m3 s‐1) and represents the SPG intensity. The westward flows followed two main pathways at 57°N near the Bight Fracture Zone and at 59 – 62°N. We...
Tipo: Text Palavras-chave: North Atlantic subpolar gyre; Bathymetry; Water masses; Circulation; Observations.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00454/56604/58296.pdf
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Fitoplancton en el afloramiento de las Islas Galápagos, durante Agosto 2000 OceanDocs
Torres, G.; Tapia, M.E..
Esta investigación es parte del Proyecto Indicadores Biológicos de diferentes ecosistemas marinos del Ecuador, correspondiente a la región Insular de Galápagos durante agosto 2000, con el propósito de comprender la dinámica poblacional del fitoplancton (cuali-cuantitativo) de las diferentes masas de agua que afloran al este y oeste de Galápagos y entre las islas enfocando áreas de mayor fertilidad marina en la época seca.
Tipo: Journal Contribution Palavras-chave: Phytoplankton; Chlorophylls; Biomass; Upwelling; Marine ecology; Water masses; Population dynamics; Cruises; Oceanic islands; Phytoplankton; Biomass; Chlorophylls; Marine ecology; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_4609; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2002 URL: http://hdl.handle.net/1834/2296
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Interannual variability of upper ocean water masses as inferred from Argo Array ArchiMer
Kolodziejczyk, Nicolas; Llovel, William; Portela, Esther.
nterannual variability of Ocean Heat Content (OHC) is intimately linked to ocean water mass changes. Water mass characteristics are imprinted at the ocean surface and are modulated by climate variability on interannual to decadal time scales. In this study, we investigate the water mass change and their variability using an isopycnal decomposition of the OHC. For that purpose, we address the thickness and temperature changes of these water masses using both individual temperature‐salinity profiles and optimal interpolated products from Argo data. Isopycnal decomposition allows us to characterize the water masses interannual variability and decadal trends of volume and OHC. During the last decade (2006–2015), much of interannual and decadal warming is...
Tipo: Text Palavras-chave: Water masses; Ocean heat content; Interannual variability; Argo; Mode water; Atmospheric forcing.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00510/62128/66340.pdf
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La circulation des eaux en Baie de Seine ArchiMer
Chabertd'Hieres, G.
In a joint work several laboratories have attempted to research coherent results on water mass circulation in Seine Bay. The main focus of their research is the measurement and the calculation of instantaneous currents and the study of their temporal and geographical variations, not only to know these currents, but, also to determinate the short or long-term development of water masses. In this report the author comments and presents the notions which have been drawn from this work.
Tipo: Text Palavras-chave: Current measurement; Current prediction; Water masses; Water circulation.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1256.pdf
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Los eufáusidos en el mar ecuatoriano como indicadores de masas de agua, durante el crucero oceanográfico CO-II-99. Septiembre-octubre de 1999 OceanDocs
Castañeda, P..
Se analiza la distribución, abundancia relativa y composición de especies del orden Euphausiacea en el mar ecuatoriano, en el período septiembre-octubre de 1999 (CO-II-99). De un total de 25047 org/1000m³ se identificaron las siguientes especies Nyctiphanes simplex; Euphausia distinguenda; E. diomedeae; E. tenera; Stylocheiron sp., S. carinatum; S. longicorne; Nematoscelis sp., N. gracilis; N. tenella; Nematobrachion flexipes y Thysanopoda orientalis. La información biológica obtenida se correlaciona con las condiciones físicas del océano observadas durante el período de estudio. Se destaca la abundancia de Nyctiphanes simplex, en el área de influencia de la Corriente de Humboldt. La distribución de las especies propias de aguas tropicales y subtropicales...
Tipo: Journal Contribution Palavras-chave: Indicator species; Water masses; Distribution; Abundance; Composition; Cruises; Marine crustaceans; New records; Distribution; Indicator species; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_35790.
Ano: 2000 URL: http://hdl.handle.net/1834/2275
Registros recuperados: 33
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