Consulta: subjectFacets:"Surface currents"
Registros recuperados: 7
Data/hora: 09/06/2024 00:55:57

HF Radar Activity in European Coastal Seas: Next Steps toward a Pan-European HF Radar Network
Provedor de dados: 5
Autores: Rubio, Anna; Mader, Julien; Corgnati, Lorenzo; Mantovani, Carlo; Griffa, Annalisa; Novellino, Antonio; Quentin, Céline; Wyatt, Lucy; Schulz-stellenfleth, Johannes; Horstmann, Jochen; Lorente, Pablo; Zambianchi, Enrico; Hartnett, Michael; Fernandes, Carlos; Zervakis, Vassilis; Gorringe, Patrick; Melet, Angélique; Puillat, Ingrid.
High Frequency Radar (HFR) is a land-based remote sensing instrument offering a unique insight to coastal ocean variability, by providing synoptic, high frequency and high resolution data at the ocean atmosphere interface. HFRs have become invaluable tools in the field of operational oceanography for measuring surface currents, waves and winds, with direct applications in different sectors and an unprecedented potential for the integrated management of the coastal zone. In Europe, the number of HFR networks has been showing a significant growth over the past 10 years, with over 50 HFRs currently deployed and a number in the planning stage. There is also a growing literature concerning the use of this technology in research and operational oceanography. A...
Tipo: Text
Palavras-chave: High frequency radar; Operational oceanography; Coastal observing systems; Radar remote sensing; Surface currents; Surface waves; Model assessment; Data assimilation.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00368/47879/47895.pdf

Wind-induced drift of objects at sea: The leeway field method
Provedor de dados: 5
Autores: Breivik, Oyvind; Allen, Arthur A.; Maisondieu, Christophe; Roth, Jens Christian.
A method for conducting leeway field experiments to establish the drift properties of small objects (0.1-25 m) is described. The objective is to define a standardized and unambiguous procedure for condensing the drift properties down to a set of coefficients that may be incorporated into existing stochastic trajectory forecast models for drifting objects of concern to search and rescue operations and other activities involving vessels lost at sea such as containers with hazardous material. An operational definition of the slip or wind and wave-induced motion of a drifting object relative to the ambient current is proposed. This definition taken together with a strict adherence to a 10 m wind speed allows us to refer unambiguously to the leeway of a...
Tipo: Text
Palavras-chave: Search and rescue; SAR; Leeway; Trajectory modelling; Surface currents; Drifting objects; Drifters; Ocean modeling.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00037/14814/12152.pdf

Progress in satellite remote sensing for studying physical processes at the ocean surface and its borders with the atmosphere and sea ice
Provedor de dados: 5
Autores: Shutler, Jamie D.; Quartly, Graham D.; Donlon, Craig J.; Sathyendranath, Shubha; Platt, Trevor; Chapron, Bertrand; Johannessen, Johnny A.; Girard-ardhuin, Fanny; Nightingale, Philip D.; Woolf, David K.; Hoyer, Jacob L.
Physical oceanography is the study of physical conditions, processes and variables within the ocean, including temperature-salinity distributions, mixing of the water column, waves, tides, currents and air-sea interaction processes. Here we provide a critical review of how satellite sensors are being used to study physical oceanography processes at the ocean surface and its borders with the atmosphere and sea ice. The paper begins by describing the main sensor types that are used to observe the oceans (visible, thermal infrared and microwave) and the specific observations that each of these sensor types can provide. We then present a critical review of how these sensors and observations are being used to study: (i) ocean surface currents, (ii) storm...
Tipo: Text
Palavras-chave: Atmosphere-ocean interface; Sea ice; Remote sensing; Surface currents; Storm surge; Surface heat fluxes; Atmosphere-ocean gas fluxes; Oceanography.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44405/44318.pdf

Distribución de las corrientes superficiales y subsuperficiales en la Caleta Aeolian-Isla Baltra
Provedor de dados: 20
Autores: Lucero, M.; Mindiola, M.
Con el objeto de determinar el patrón de circulación en la Caleta AEOLIAN, en septiembre del 2006 se realizaron mediciones de corrientes a nivel superficial y subsuperficial, periodo correspondiente a una época seca (verano), durante este periodo se realizaron mediciones de perfiles de corrientes utilizando un correntómetro perfilador ADCP WHS300 y de manera adicional se realizaron mediciones de corrientes superficiales para lo cual se utilizaron flotadores a la deriva. El área de estudio esta sujeta a una intensa variación, probablemente debido a la acción conjugada de los vientos, al ciclo mareal, a los efectos topográficos por la cercanía a la línea costera, con velocidades promedios de 0.21 m/s en las capas superficiales, 0.18 m/s en las capas media y...
Tipo: Journal Contribution
Palavras-chave: Current meters; Surface currents; Surface layers; Tidal cycles; Equatorial upwelling; Dry season; Oceanic islands; Nearshore dynamics; Dry season; Http://aims.fao.org/aos/agrovoc/c_2400.
Ano: 2007
URL: http://hdl.handle.net/1834/2394

Contribution à l'analyse d’intensité de l'upwelling près du Cap Blanc (Mauritanie) à partir des températures d'eau de la station « standard » Bayadère
Provedor de dados: 20
Autores: Loktionov, Y.
Cet article décrit les résultats d’une analyse du niveau de corrélation entre les températures d’eau près de la bouée Bayadère (20°40’N – 17°04’W) et l’intensité de l’upwelling dans le secteur du Cap Blanc. La relation entre les températures d’eau et l’activité du vent (Indice d’upwelling) a été étudiée en intégrant la variabilité saisonnière des conditions thermiques dans cette région. Une modification de cette relation en fonction des saisons hydrologiques a été mise en évidence.
Tipo: Journal Contribution
Palavras-chave: Seasonal distribution; Seasonal variations; Surface currents; Surface temperature; Temperature; Upwelling; Temperature; Http://aims.fao.org/aos/agrovoc/c_7657.
Ano: 1989
URL: http://hdl.handle.net/1834/1143

Estudio de corrientes marinas en la Bahía Chile (Bahía Discovery)
Provedor de dados: 20
Autores: Medina, F.
Velocidades superficiales de las aguas fueron medidas en la Bahía chile en la Isla Greenwich, como parte de la Segunda Expedición Ecuatoriana a la Antártida, durante el verano del hemisferio sur, en 1990. Masas de hielo a la deriva desprendidas desde la costa fueron usadas como trazadores lagrangianos. Son comparadas corrientes superficiales y observaciones de vientos. La circulación superficial es determinada por los vientos cuando la velocidad de estos últimos exceden los 6 m/s. Los valores máximos y la dirección de la deriva superficial dependen exclusivamente del campo de viento prevaleciente. La velocidad de la corriente puede alcanzar valores de hasta 40 cm/s.
Tipo: Journal Contribution
Palavras-chave: Surface water; Ice drift; Surface currents; Surface drifters; Polar waters; Surface circulation; Surface water.
Ano: 1990
URL: http://hdl.handle.net/1834/3727

Guide to operational procedures for the collection and exchange of oceanographic data (bathy and tesac)
Provedor de dados: 20
Tipo: Book
Palavras-chave: Oceanography; Data acquisition; Data storage; Data transmission; Data processing; Quality control; Salinity data; Salinity measurement; Salinity measuring equipment; Surface currents; Surface salinity; Surface temperature; Data acquisition; Data storage; Data processing; Http://aims.fao.org/aos/agrovoc/c_37344; Http://aims.fao.org/aos/agrovoc/c_37221; Http://aims.fao.org/aos/agrovoc/c_10289.
Ano: 1982
URL: http://hdl.handle.net/1834/2707