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Registros recuperados: 27
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A first overview of the 53 year past hydrodynamical variability in the Bay of Biscay from a regional simulation ArchiMer
Charria, Guillaume; Vandermeirsch, Frederic; Theetten, Sebastien; Assassi, Charefeddine; Dussin, Raphael.
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00197/30786/29144.pdf
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Circulation on the shelf and the upper slope of the Bay of Biscay ArchiMer
Le Boyer, Arnaud; Charria, Guillaume; Le Cann, Bernard; Lazure, Pascal; Marie, Louis.
Here, we used measurements taken with an array of 10 acoustic Doppler current profilers deployed from July 2009 to August 2011 to describe the tidally filtered circulation over the shelf and upper slope on the French side off the French coasts of the Bay of Biscay. The measurements provided an overview of the shelf and slope circulation throughout the entire water column over a large range of spatial and time scales. The average circulation over the shelf and upper slope of the Bay of Biscay was poleward following the topography with a speed of the order of 3 cm s(-1). This average circulation had marked seasonal variability. In summer, the currents were equatorward on the outer shelf near surface. Deeper in the water column, the flow remained poleward. In...
Tipo: Text Palavras-chave: Bay of Biscay; Observation; Shelf and slope circulation; Vertical profile; ADCP; Wind driven circulation.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00139/24976/26395.pdf
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Coastal Ocean and Nearshore Observation: A French Case Study ArchiMer
Cocquempot, Lucie; Delacourt, Christophe; Paillet, Jerome; Riou, Philippe; Aucan, Jérôme; Castelle, Bruno; Charria, Guillaume; Claudet, Joachim; Conan, Pascal; Coppola, Laurent; Hocdé, Régis; Planes, Serge; Raimbault, Patrick; Savoye, Nicolas; Testut, Laurent; Vuillemin, Renaud.
To understand and predict the physical, chemical, and biological processes at play in coastal and nearshore marine areas requires an integrated, interdisciplinary approach. The case study of the French structuration of coastal ocean and nearshore observing systems provides an original overview on a federative research infrastructure named ILICO. It is a notable example of national structuration and pan-institution efforts to investigate the forefront of knowledge on the processes at work within the critical coastal zone. ILICO comprises, in a pluridisciplinary approach, eight distributed network-systems of observation and data analysis that are accredited and financially supported by French research institutions and the French Ministry for Higher...
Tipo: Text Palavras-chave: Observation infrastructure; National structuration; Interdisciplinary; Coastal ocean; Coastline.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00503/61489/65292.pdf
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CORIOLIS. Rapport d’activités 2016 ArchiMer
Pouliquen, Sylvie; Maze, Guillaume; Lebreton, Nathanaele; D'Ortenzio, Fabrizio; Alory, Gaël; Delcroix, Thierry; Bourles, Bernard; Blouch, Pierre; Guinet, Christophe; Gouriou, Yves; Gaillard, Fabienne; Heyndrickx, Céline; Le Menn, Marc; Testor, Pierre; Donato, Vincent; Charria, Guillaume; Carval, Thierry; Reverdin, Gilles; Emzivat, Gilbert.
Rapport d'activité Coriolis pour l'année 2016 dans le cadre de la convention cadre Coriolis 2014-2020
Tipo: Text
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00388/49970/50562.pdf
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Cross-shelf exchanges in the Bay of Biscay ArchiMer
Akpinar, Anil; Charria, Guillaume; Vandermeirsch, Frederic; Szekely, Tanguy.
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00450/56154/57696.pdf
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Effect of river runoff on sea level from in-situ measurements and numerical models in the Bay of Biscay ArchiMer
Laiz, Irene; Ferrer, Luis; Plomaritis, Theocharis A.; Charria, Guillaume.
Daily time series of in-situ tide gauge records and river runoff data were analysed to investigate the contribution of river discharge storm events to sea level in the Bay of Biscay. Three main river systems were considered for this study, representing cases of small (Nervión, 1900 km2), medium (Adour, 16880 km2) and large (Gironde, 84811 km2) watershed basins. Typical storms correspond to water discharge rates of 150, 700, and 1100 m3 s−1 from the Nervión, Adour, and Gironde rivers, respectively. The effect of these events on daily mean sea level was evaluated using two different approaches: (1) through the analysis of time series of tide gauges placed within the river mouths; and (2) through numerical simulations using the ROMS model (Regional Ocean...
Tipo: Text Palavras-chave: Bay of Biscay; Sea level; Tide gauges; River discharge; ROMS modelling.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00169/28070/26285.pdf
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ENIGME: Interannual Evolution of the Dynamics in the Bay of Biscay and the English Channel ArchiMer
Charria, Guillaume; Vandermeirsch, Frederic; Cailleau, Sylvain; Enigme’s Group,.
In a context of global change, ocean regions as the Bay of the Biscay and the English Channel represent key domains to estimate the local impact on the coasts of these evolutions. Indeed, the coastal (considering in this project regions above the continental shelf) and regional (including the continental slope and the abyssal plain) environments are sensitive to these long- term evolutions driven by the open ocean, the atmosphere and the watersheds. These evolutions can have impacts on the whole ecosystem. To understand and, by extension, forecast evolutions of these ecosystems, we need to go further in the description and the analysis of the past interannual variability over decadal to pluri-decadal periods. The ENIGME project is organised following three...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00242/35285/33802.pdf
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Evolutions interannuelles de la circulation dans le golfe de Gascogne - vers une dynamique à (sous)mésoéchelle en milieu côtier. Observer et simuler un océan côtier turbulent ArchiMer
Charria, Guillaume.
Le golfe de Gascogne constitue une région clé pour de nombreuses activités socio- économiques. Lorsque, par exemple, les autorisations sur les efforts de pêches doivent être révisées ou les organismes publics doivent anticiper l’impact d’évènements extrêmes, il est supposé au départ que la dynamique océanique de cet environnement contraint est connue. Cependant de nombreuses inconnues persistent sur la circulation et les évolutions du contenu hydrologique (Température et Salinité) de cette région. Sur le plateau continental, les courants de densité et la circulation forcée par le vent, arrivent à imprimer un écoulement résiduel dans un environnement oscillant au rythme de la marée. Au niveau du talus continental, une barrière...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00475/58702/61212.pdf
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Gap analysis of links between coastal and open ocean networks ArchiMer
Akpinar, Anil; Charria, Guillaume.
The gap analysis of observing systems presented in this report is focused on the evaluation of the continuum between coastal observations and open ocean observations (including the shelf-break transition region). Some recommendations are suggested with the aim of improving the efficiency of existing observing systems in coastal and open ocean regions. Gaps in Observing networks, Data availability, Sustainability and Technology are considered. Main recommendations following identified gaps can be summarized as: -  The spatial coverage of observing networks need to be improved between the near-coast and open ocean observing systems. -  The general lack of observations over the shelf break and the continental shelf can be improved based on opportunity...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00463/57443/59546.pdf
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Importance of Dissolved Organic Nitrogen in the North Atlantic Ocean in sustaining primary production: a 3D modeling approach ArchiMer
Charria, Guillaume; Dadou, Isabelle; Llido, Jérôme; Drevillon, Marie; Garcon, Veronique.
Tipo: Text
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00058/16966/14458.pdf
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Influence des ondes de Rossby sur le système biogéochimique de l'Océan Atlantique Nord: Utilisation des données satellites couleur de l'eau et d'un modèle couplé physique/biogéochimie ArchiMer
Charria, Guillaume.
The marine phytoplankton in the ocean represents only less than 1% of global biomass. Phytoplankton performs half of all photosynthesis. This autotrophic biomass in ocean is then an essential element in the climate regulation through processes as carbon dioxide absorption during the photosynthesis. Therefore, we need to estimate precisely this biomass as well as the processes which affect it. Using remotely sensed data (altimetry and ocean colour) and a coupled physical/biogeochemical model (MERCATOR-OPA/NPZDDON), Rossby waves and their influence on phytoplankton biomass are specifically studied in the North Atlantic Ocean. Their features and their influences on surface chlorophyll concentrations were analysed. Through the different mechanisms identified,...
Tipo: Text Palavras-chave: Coupled physical/biogeochemical modelling; Multi sensor wavelet analysis; Ocean carbon cycle; North Atlantic Ocean; Primary production; Ocean colour; Altimetry; Rossby (or planetary) waves; Planetary waves; Coupled physical/biogeochemical oceanography; Modélisaiton couplée physique/biogéochimie; Analyse en ondelettes multi capteurs; Cycle océanique du carbone; Océan Atlantique Nord; Production primaire; Couleur de l'eau; Altimétrie; Ondes de Rossby ou planétaires; Océanographie couplée physique/biogéochimie.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-2454.pdf
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Influence of Rossby waves on primary production from a coupled physical-biogeochemical model in the North Atlantic Ocean ArchiMer
Charria, Guillaume; Dadou, Isabelle; Cipollini, Paolo; Drevillon, Marie; Garcon, Veronique.
Rossby waves appear to have a clear signature on surface chlorophyll concentrations which can be explained by a combination of vertical and horizontal mechanisms. In this study, we investigate the role of the different physical processes in the north Atlantic to explain the surface chlorophyll signatures and the consequences on primary production, using a 3-D coupled physical/biogeochemical model for the year 1998.
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Ano: 2008 URL: http://archimer.ifremer.fr/doc/00058/16965/14457.pdf
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Interannual evolution of (sub)mesoscale dynamics in the Bay of Biscay ArchiMer
Charria, Guillaume; Theetten, Sebastien; Vandermeirsch, Frederic; Yelekci, Ozge; Audiffren, Nicole.
In the north-east Atlantic Ocean, the Bay of Biscay is an intersection between a coastal constrained dynamics (wide continental shelf and shelf break regions) and an eastern boundary circulation system. In this framework, the eddy kinetic energy is 1 order of magnitude lower than in western boundary systems. To explore this coastal complex system, a high-resolution (1 km, 100 vertical sigma layers) model experiment including tidal dynamics over a period of 10 years (2001–2010) has been implemented. The ability of the numerical environment to reproduce main patterns over interannual scales is demonstrated. Based on this experiment, the features of the (sub)mesoscale processes are described in the deep part of the region (i.e. abyssal plain and continental...
Tipo: Text
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00403/51468/52038.pdf
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Interannual variability of temperature over 50 years described by global simulation ArchiMer
Assassi, Charefeddine; Vandermeirsch, Frederic; Morel, Yves; Charria, Guillaume; Theetten, Sebastien; Dussin, Raphael; Molines, Jean-marc.
The aim of this study is to better understand the different overriding mechanisms that control the evolution of the temperature in the Bay of Biscay, through realistic simulations over a period of 50 years. Based on the work of Michel et al. (2009) on the variability of temperature in the Bay of Biscay (Fig1). We will extend the understanding of the interannual variability to the haline contents and the circulation at regional scale. Here we compare two global simulations, ORCA-G70 and ORCA-GRD100 (¼°resolution), that differs mainly in the vertical resolution and we show their variability.
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00197/30778/29137.pdf
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Model-Observations Synergy in the Coastal Ocean ArchiMer
De Mey-frémaux, Pierre; Ayoub, Nadia; Barth, Alexander; Brewin, Robert; Charria, Guillaume; Campuzano, Francisco; Ciavatta, Stefano; Cirano, Mauro; Edwards, Christopher A.; Federico, Ivan; Gao, Shan; Garcia Hermosa, Isabel; Garcia Sotillo, Marcos; Hewitt, Helene; Hole, Lars Robert; Holt, Jason; King, Robert; Kourafalou, Villy; Lu, Youyu; Mourre, Baptiste; Pascual, Ananda; Staneva, Joanna; Stanev, Emil V.; Wang, Hui; Zhu, Xueming.
Integration of observations of the coastal ocean continuum, from regional oceans to shelf seas and estuaries/deltas with models, can substantially increase the value of observations and enable a wealth of applications. In particular, models can play a critical role at connecting sparse observations, synthesizing them, and assisting the design of observational networks; in turn, whenever available, observations can guide coastal model development. Coastal observations should sample the two-way interactions between nearshore, estuarine and shelf processes and open ocean processes, while accounting for the different pace of circulation drivers, such as the fast atmospheric, hydrological and tidal processes and the slower general ocean circulation and climate...
Tipo: Text Palavras-chave: Coastal; Ocean; Observations; Models; Synergy; Synthesis; Assimilation; Array design.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00508/61961/66050.pdf
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Monitoring of a quasi-stationary eddy in the Bay of Biscay by means of satellite, in situ and model results ArchiMer
Caballero, Ainhoa; Ferrer, Luis; Rubio, Anna; Charria, Guillaume; Taylor, Benjamin H.; Grima, Nicolas.
The presence of a quasi-stationary anticyclonic eddy within the southeastern Bay of Biscay (centred around 44°30′N-4°W) has been reported on various occasions in the bibliography. The analysis made in this study for the period 2003–2010, by using in situ and remote sensing measurements and model results shows that this mesoscale coherent structure is present almost every year from the end of winter-beginning of spring, to the beginning of fall. During this period it remains in an area limited to the east by the Landes Plateau, to the west by Le Danois Bank and Torrelavega canyon and to the northwest by the Jovellanos seamount. All the observations and analysis made in this contribution, suggest that this structure is generated between Capbreton and...
Tipo: Text Palavras-chave: Bay of Biscay; Eddies; SWODDIES; Topographic effects; Vortex; Mesoscale; Altimetry; Satellite oceanography; Drifters; ROMS.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00161/27260/25469.pdf
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Observing submesoscale activity in the Bay of Biscay with satellite-derived SST and Chlorophyll concentration ArchiMer
Yelekci, Ozge; Charria, Guillaume; Mawren, Daneeja; Capet, Xavier; Reverdin, Gilles; Gohin, Francis; Sudre, Joel; Yahia, Hussein.
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00197/30787/29145.pdf
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Optimizing observational networks combining gliders, moored buoys and FerryBox in the Bay of Biscay and English Channel ArchiMer
Charria, Guillaume; Lamouroux, Julien; De Mey, Pierre.
Designing optimal observation networks in coastal oceans remains one of the major challenges towards the implementation of future efficient Integrated Ocean Observing Systems to monitor the coastal environment. In the Bay of Biscay and the English Channel, the diversity of involved processes (e.g. tidally-driven circulation, plume dynamics) requires to adapt observing systems to the specific targeted environments. Also important is the requirement for those systems to sustain coastal applications. Two observational network design experiments have been implemented for the spring season in two regions: the Loire River plume (northern part of the Bay of Biscay) and the Western English Channel. The method used to perform these experiments is based on the ArM...
Tipo: Text Palavras-chave: Design of in situ observation network; Bay of Biscay; English Channel; Glider; FerryBox.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00324/43545/43102.pdf
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PREVIMER: A contribution to in situ coastal observing systems ArchiMer
Charria, Guillaume; Repecaud, Michel; Quemener, Loic; Menesguen, Alain; Rimmelin-maury, Peggy; L'Helguen, Stephane; Beaumont, Laurence; Jolivet, Aurelie; Morin, Pascal; Mace, E; Lazure, Pascal; Le Gendre, Romain; Jacqueline, Franck; Verney, Romaric; Marie, Louis; Jegou, Paul; Le Reste, Serge; Andre, Xavier; Dutreuil, Vincent; Regnault, Jean-pierre; Jestin, Herve; Lintanf, Herve; Pichavant, Pascal; Retho, Michael; Allenou, Jean-pierre; Stanisiere, Jean-yves; Bonnat, Armel; Nonnotte, Lidwine; Duros, Wenceslas; Tarot, Stephane; Carval, Thierry; Le Hir, Pierre; Dumas, Franck; Vandermeirsch, Frederic; Lecornu, Fabrice.
To design a prototype for an Integrated Ocean Observing System (IOOS), at least three components are mandatory: a modeling platform, an in situ observing system and a structure to collect and to disseminate the information (e.g. database, website). The PREVIMER project followed this approach and in order to sustain model applications, PREVIMER has developed, funded and organized part of in situ observing networks in the Bay of Biscay and the Channel. For a comprehensive system, focus was addressed on fi xed platforms (MAREL MOLIT, MAREL Iroise, Island network and D4 for sediment dynamics), ships of opportunity (RECOPESCA program and FerryBoxes), and coastal profi lers (ARVOR-C/Cm). Each system is briefl y described and examples of scientifi c results...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00197/30785/29143.pdf
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PREVIMER: Downscaling from MyOcean regional scale to coastal scale ArchiMer
Pineau-guillou, Lucia; Dumas, Franck; Petton, Sebastien; Garreau, Pierre; Herbert, Gaelle; Charria, Guillaume; Le Traon, Pierre-yves; Debreu, Laurent.
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00214/32496/30976.pdf
Registros recuperados: 27
Primeira ... 12 ... Última
 

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