|
|
|
| Registros recuperados: 40 | |
|
|
| 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 |
| |
|
|
| Thomas, Leif N.; Shakespeare, Callum J.. |
| A simple analytical model is used to elucidate a potential mechanism for steady-state mode water formation at a thermohaline front that involves frontogenesis, submesoscale lateral mixing, and cabbeling. This mechanism is motivated in part by recent observations of an extremely sharp, density-compensated front at the North Wall of the Gulf Stream. Here, the intergyre, along-isopycnal, salinity-temperature difference is compressed into a span of a few kilometers, making the flow susceptible to cabbeling. The sharpness of the front is caused by frontogenetic strain, which is presumably balanced by submesoscale lateral mixing processes. The balance is studied with the simple model, and a scaling is derived for the amount of water mass transformation resulting... |
| Tipo: Text |
Palavras-chave: Circulation/ Dynamics; Frontogenesis/frontolysis; Fronts; Ocean dynamics; Atm/Ocean Structure/ Phenomena; Water masses. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00351/46243/46107.pdf |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| Puerta, Patricia; Johnson, Clare; Carreiro-silva, Marina; Henry, Lea-anne; Kenchington, Ellen; Morato, Telmo; Kazanidis, Georgios; Luis Rueda, Jose; Urra, Javier; Ross, Steve; Wei, Chih-lin; Manuel Gonzalez-irusta, Jose; Arnaud-haond, Sophie; Orejas, Covadonga. |
| Circulation patterns in the North Atlantic Ocean have changed and re-organized multiple times over millions of years, influencing the biodiversity, distribution, and connectivity patterns of deep-sea species and ecosystems. In this study, we review the effects of the water mass properties (temperature, salinity, food supply, carbonate chemistry, and oxygen) on deep-sea benthic megafauna (from species to community level) and discussed in future scenarios of climate change. We focus on the key oceanic controls on deep-sea megafauna biodiversity and biogeography patterns. We place particular attention on cold-water corals and sponges, as these are ecosystem-engineering organisms that constitute vulnerable marine ecosystems (VME) with high associated... |
| Tipo: Text |
Palavras-chave: North Atlantic; Deep-sea; Biodiversity; Biogeography; Water masses; Vulnerable marine ecosystems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00628/74006/73330.pdf |
| |
|
|
| 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 |
| |
| Registros recuperados: 40 | |
|
|
|
