Consulta: creatorFacets:"Charria, Guillaume"
Registros recuperados: 33
Data/hora: 05/06/2024 13:51:17

Technical and physical challenges to achieve a regional simulation at multi-decadal scales: Applications to the Bay of Biscay.
Provedor de dados: 5
Autores: Theetten, Sebastien; Vandermeirsch, Frederic; Assassi, Charefeddine; Charria, Guillaume.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00195/30652/29120.pdf

Spatial and Seasonal Distributions of Frontal Activity over the French Continental Shelf in the Bay of Biscay
Provedor de dados: 5
Autores: Yelekci, Ozge; Charria, Guillaume; Capet, Xavier; Reverdin, Gilles; Sudre, Joel; Yahia, Hussein.
The frontal activity in coastal regions remains a research field where a large number of open questions needs to be addressed to quantify the potential impact of these processes on dependent systems (e.g. biogeochemical activity). Spatial and seasonal distributions of Sea Surface Temperature (SST) fronts (∼1-100 km) in the vicinity of main French rivers, Gironde and Loire, are explored over the continental shelf North of 45 °N in the Bay of Biscay. A high resolution (1 km spatial and daily temporal resolutions) dataset of 11 years' (2003 to 2013) remotely sensed SST by MODIS sensor onboard Aqua and Terra satellites has been investigated and compared with coastal numerical model experiments. The detection and characterization fronts with fluctuating...
Tipo: Text
Palavras-chave: Bay of Biscay; Fronts; Submesoscale; Satellite; Sea surface temperature; Singularity exponent.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00389/50013/50602.pdf

Coastal Ocean Forecasting: system integration and evaluation
Provedor de dados: 5
Autores: Kourafalou, V. H.; De Mey, P.; Le Henaff, M.; Charria, Guillaume; Edwards, C. A.; He, R.; Herzfeld, M.; Pascual, A.; Stanev, E. V.; Tintore, J.; Usui, N.; Van Der Westhuysen, A. J.; Wilkin, J.; Zhu, X.
Recent advances in Coastal Ocean Forecasting Systems (COFS) are discussed. Emphasis is given in the integration of the observational and modeling components, each developed in the context of monitoring and forecasting in the coastal seas. These integrated systems must be linked to larger scale systems toward seamless data sets, nowcasts and forecasts (from the global ocean, through the continental shelf and to the nearshore regions). Emerging capabilities include: methods to optimize coastal/regional observational networks; and probabilistic approaches to address both science and applications related to COFS. International collaboration is essential to exchange best practices, achieve common frameworks and establish standards.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00242/35281/83231.pdf

PREVIMER: Downscaling from MyOcean regional scale to coastal scale
Provedor de dados: 5
Autores: 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

VACUMM - A Python Library for Ocean Science
Provedor de dados: 5
Autores: Raynaud, Stephane; Charria, Guillaume; Wilkins, Jonathan; Garnier, Valerie; Garreau, Pierre; Theetten, Sebastien.
VACUMM is an open-source Python library for processing data from observations and numerical models. The library is now used for several years in research and operational contexts, for instance for producing fi gures and reports, validating models, converting data, or making simple or advanced diagnostics. In this paper, we introduce how the library is built, and we present two applications of its use: one in an operational context and one in a research context.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30784/29142.pdf

Surface water circulation patterns in the southeastern bay of biscay: new evidences from hf radar data
Provedor de dados: 5
Autores: Solabarrieta, Lohitzune; Rubio, Anna; Castanedo, Sonia; Medina, Raul; Charria, Guillaume; Hernandez, Carl.
High Frequency (HF) radar stations have been working operationally in the southeastern part of the Bay of Biscay since 2009. The (2) systems provide hourly surface currents, with 5 km spatial resolution and a radial coverage lying close to 180 km. The detailed and quantitative description of the spatial patterns observed by the HF radar offers new evidence on the main ocean processes, at different time scales, affecting a study area where surface currents show marked temporal and spatial variability. A clear seasonality in terms of sea surface currents and along-slope circulation is observed, with cyclonic and anticyclonic patterns during the winter and summer months, respectively. From the analysis of low-pass filtered currents, a key component of this...
Tipo: Text
Palavras-chave: HF radar; Surface circulation patterns; Seasonal and mesoscale variability; Inertial currents; Bay of Biscay; Iberian Poleward Current (IPC).
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28063/26380.pdf

Influence of Rossby waves on primary production from a coupled physical-biogeochemical model in the North Atlantic Ocean
Provedor de dados: 5
Autores: 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.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00058/16965/14457.pdf

Regional assessment of altimetry products in the NW Med : Comparison to in-situ data and model outputs
Provedor de dados: 5
Autores: Dussurget, Renaud; Pairaud, Ivane; Dufau, Claire; Charria, Guillaume; Garreau, Pierre; Garnier, Valerie.
In this preliminary study, we investigate the characteristics of a standard regional NRT product &amp; an experimental L3 coastal sea-level product from PISTACH data, and assess their combined use with in-situ data (drifters) and a regional model. The results suggest that: •J2 NRT data shows some consistent behaviour with drifter data, despite biases •RED3 retracking : better coastal coverage (&gt;5%) •NORMED model has an excess of energy at the mesoscales, possibly arising from the lack of energy dissipation towards the finer scales
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00410/52143/52860.pdf

CORIOLIS. Rapport d’activités 2016
Provedor de dados: 5
Autores: 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

Description de la configuration régionale BOB400 du modèle CROCO (Bay Of Biscay 400 mètres de résolution spatiale horizontale)
Provedor de dados: 5
Autores: Theetten, Sebastien; Charria, Guillaume.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00636/74855/75249.pdf

Cross-shelf exchanges in the Bay of Biscay
Provedor de dados: 5
Autores: Akpinar, Anil; Charria, Guillaume; Vandermeirsch, Frederic; Szekely, Tanguy.
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00450/56154/57696.pdf

Cross-shelf exchanges in the northern Bay of Biscay
Provedor de dados: 5
Autores: Akpınar, Anil; Charria, Guillaume; Theetten, Sebastien; Vandermeirsch, Frederic.
The spatio-temporal distribution of cross-shelf exchanges in the northern Bay of Biscay from 2007 to 2010 were investigated using a high-resolution three-dimensional model as well as sea-surface temperature and chlorophyll-a concentration satellite observations. Our results show that the net yearly mean transport was upslope each year, with 2010 showing the highest value (0.93 Sv upslope). Bottom fluxes showed peak values near Chapel Bank, with mean values of 0.1 m3 s−1 m−2 and maximum values of 0.2 m3 s−1 m−2. Our model demonstrated that cross-shelf exchanges can be divided into three vertical layers. At the surface, cross-shelf transports are driven by wind forcing (Ekman transport accounts for about 60% of the total cross-shelf transport) and mesoscale...
Tipo: Text
Palavras-chave: Cross-shelf exchanges; Shelf break; Mesoscale dynamics; Slope current; Bay of Biscay.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00606/71801/70289.pdf

Toward a European Coastal Observing Network to Provide Better Answers to Science and to Societal Challenges; The JERICO Research Infrastructure
Provedor de dados: 5
Autores: Farcy, Patrick; Durand, Dominique; Charria, Guillaume; Painting, Suzanne J.; Tamminem, Timo; Collingridge, Kate; Grémare, Antoine J.; Delauney, Laurent; Puillat, Ingrid.
The coastal area is the most productive and dynamic environment of the world ocean, offering significant resources and services for mankind. As exemplified by the UN Sustainable Development Goals, it has a tremendous potential for innovation and growth in blue economy sectors. Due to the inherent complexity of the natural system, the answers to many scientific and societal questions are unknown, and the impacts of the cumulative stresses imposed by anthropogenic pressures (such as pollution) and climate change are difficult to assess and forecast. A major challenge for the scientific community making observations of the coastal marine environment is to integrate observations of Essential Ocean Variables for physical, biogeochemical, and biological...
Tipo: Text
Palavras-chave: European Research Infrastructure; JERICO and JERICO-NEXT; Coastal essential ocean variables; Coastal observatories; High frequency; Physics; Biogeochemistry and biology.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00514/62595/66955.pdf

Gap analysis of links between coastal and open ocean networks
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00463/57443/59546.pdf

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
Provedor de dados: 5
Autores: 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

Coastal Ocean and Nearshore Observation: A French Case Study
Provedor de dados: 5
Autores: 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

Importance of Dissolved Organic Nitrogen in the North Atlantic Ocean in sustaining primary production: a 3D modeling approach
Provedor de dados: 5
Autores: Charria, Guillaume; Dadou, Isabelle; Llido, Jérôme; Drevillon, Marie; Garcon, Veronique.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00058/16966/14458.pdf

Spatial and temporal variability of the remotely sensed chlorophyll a signal associated with Rossby waves in the South Atlantic Ocean
Provedor de dados: 5
Autores: Gutknecht, Elodie; Dadou, Isabelle; Charria, Guillaume; Cipollini, Paolo; Garcon, Veronique.
The present study focuses on the spatial and temporal variability of interactions between physics and biogeochemistry during the Rossby wave passage in the South Atlantic Ocean. The Rossby wave signature in sea level anomalies (SLA) and surface chlorophyll a concentration anomalies (CHLA) is analyzed using remotely sensed data from 1997 to 2006. Wavelengths between 400 and 1100 km, with westward propagating speeds up to 7.5 cm.s−1, are observed. Using a theoretical model, three processes (meridional advection of surface chlorophyll a concentrations, uplifting of subsurface chlorophyll a maximum, and upwelling of nutrients) are likely to explain the chlorophyll a Rossby wave signature. A statistical assumption allows quantifying the relative importance of...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00026/13723/10832.pdf

ENIGME: Interannual Evolution of the Dynamics in the Bay of Biscay and the English Channel
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00242/35285/33802.pdf

Objective design of coastal HF Radar networks using stochastic array modes (ArM toolbox)
Provedor de dados: 5
Autores: Skandrani, Chafih; De Mey, Pierre; Charria, Guillaume.
In the framework of the European projects FP7 JERICO (http://www.jerico-fp7.eu/) and H2020 JERICO NEXT (http://www.jerico-ri.eu/), this study consisted in carrying out an objective design analysis of coastal HF radar networks with the ArM (Array Modes) method (Le Hénaff et al., 2009; Lamouroux et al., 2016; Charria et al., 2016). The ArM approach is a non-assimilative, data-model synergistic approach: it uses ensembles in response to known error sources to describe prior (model) uncertainties, and aims at quantitatively evaluating the performance of the observation network at detecting those uncertainties amidst observational noise.  The ArM analysis consists in calculating and interpreting spectra of the representer matrix, as well as modal representers,...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00635/74726/74711.pdf

Observing submesoscale activity in the Bay of Biscay with satellite-derived SST and Chlorophyll concentration
Provedor de dados: 5
Autores: 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

Optimizing observational networks combining gliders, moored buoys and FerryBox in the Bay of Biscay and English Channel
Provedor de dados: 5
Autores: 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

National observation infrastructures in a European framework: COAST-HF A fixed-platform network along French coasts
Provedor de dados: 5
Autores: Charria, Guillaume; Schmitt, François; Artigas, Felipe; Berthebaud, Eric; Bonnat, Armel; Bourrin, François; Bozec, Yann; Cariou, Thierry; Claquin, Pascal; Conan, Pascal; Coppola, Laurent; Delalée, Franck; Facq, Jean-valery; Farcy, Patrick; Ferreira, Sophie; Garcia, Fabrice; Grisoni, Jean-michel; Jacqueline, Franck; Jacquet, Matthias; Lefebvre, Alain; Leredde, Yann; Le Roux, Jean-francois; Mas, Sébastien; Mostajir, Behzad; Mousseau, Laure; Pairaud, Ivane; Petton, Sebastien; Pouvreau, Stephane; Quemener, Loic; Ravel, Christophe; Raimbault, Patrick; Repecaud, Michel; Retho, Michael; Rimmelin-maury, Peggy; Riou, Philippe; Savoye, Nicolas; Souchu, Philippe; Verney, Romaric; Vuillemin, Renaud.
COAST-HF (Coastal OceAn observing SysTem – High Frequency) is a French national observation network of the physical and biogeochemical dynamics of the coastal ocean, at high frequency. COAST-HF aims at understanding and analysing changes of contrasted coastal ecosystems at different temporal scales from extreme or intermittent high frequency (hour, day) events to multi-year trends. Since several years (from 2000 for the longest time series in Bay of Brest), the network extends along the English Channel, Atlantic and Mediterranean French coasts through 14 fixed platforms instrumented for the in situ high-frequency (≤ 1h) observations. Several French research institutes (IFREMER, CNRS, Marine Universities) are operating these systems. The organization of...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00635/74723/74708.pdf

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
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00475/58702/61212.pdf

A first overview of the 53 year past hydrodynamical variability in the Bay of Biscay from a regional simulation
Provedor de dados: 5
Autores: Charria, Guillaume; Vandermeirsch, Frederic; Theetten, Sebastien; Assassi, Charefeddine; Dussin, Raphael.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30786/29144.pdf

Monitoring of a quasi-stationary eddy in the Bay of Biscay by means of satellite, in situ and model results
Provedor de dados: 5
Autores: 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

Circulation on the shelf and the upper slope of the Bay of Biscay
Provedor de dados: 5
Autores: 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

Interannual variability of temperature over 50 years described by global simulation
Provedor de dados: 5
Autores: 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.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30778/29137.pdf

Model-Observations Synergy in the Coastal Ocean
Provedor de dados: 5
Autores: 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

PREVIMER: A contribution to in situ coastal observing systems
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30785/29143.pdf

Extreme coastal events linked with climate variation. Understanding low salinity episodes in the Bay of Brest, north-eastern Atlantic
Provedor de dados: 5
Autores: Poppeschi, Coline; Charria, Guillaume; Unterberger, Maximilian; Rimmelin-maury, Peggy; Goberville, Eric; Barrier, Nicolas; Petton, Sebastien; Grossteffan, Emilie; Repecaud, Michel; Quemener, Loic; Theetten, Sebastien; Le Roux, Jean-francois; Treguer, Paul.
Aims - To detect and characterise extreme events in a coastal ecosystem by combining in situ high-frequency observations and high-resolution numerical simulations -To describe the interannual variability of extreme events in a context of climate change  -To quantify the links between extreme low salinity episodes and both large and local scale processes, using weather regimes, precipitations and river runoffs as proxies of hydro-climate forcing
Tipo: Text
Palavras-chave: In-situ observations; High and low frequency measurements; Extreme events; Numerical simulations; Bay of Brest; Weather regimes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00631/74346/73999.pdf

Interannual evolution of (sub)mesoscale dynamics in the Bay of Biscay
Provedor de dados: 5
Autores: 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

Effect of river runoff on sea level from in-situ measurements and numerical models in the Bay of Biscay
Provedor de dados: 5
Autores: 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