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| Registros recuperados: 33 | |
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| 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. |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00242/35281/83231.pdf |
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| 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. |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00197/30784/29142.pdf |
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| 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 |
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| 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 & 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 (>5%) •NORMED model has an excess of energy at the mesoscales, possibly arising from the lack of energy dissipation towards the finer scales |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00410/52143/52860.pdf |
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| 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 |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00388/49970/50562.pdf |
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| 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 |
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| 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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| 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... |
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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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| 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... |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00026/13723/10832.pdf |
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| 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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| 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,... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00635/74726/74711.pdf |
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| Registros recuperados: 33 | |
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