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| Registros recuperados: 17 | |
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| Landeira, Jose Maria; Ferron, Bruno; Lunven, Michel; Morin, Pascal; Marie, Louis; Sourisseau, Marc. |
| Phytoplankton blooms are usually dominated by chain-forming diatom species that can alter food pathways from primary producers to predators by reducing the interactions between intermediate trophic levels. The food-web modifications are determined by the length of the chains; however, the estimation is biased because traditional sampling strategies damage the chains and, therefore, change the phytoplankton size structure. Sedimentological studies around oceanic fronts have shown high concentrations of giant diatom mats (>1 cm in length), suggesting that the size of diatom chains is underestimated in the pelagic realm. Here, we investigate the variability in size and abundance of phytoplankton chains at the Ushant tidal front (NW France) using the Video... |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00186/29730/28148.pdf |
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| Arhan, Michel; Billant, Andre; Branellec, Pierre; Mercier, Herle; Memery, Laurent; Messias, Marie-josé; Morin, Pascal; Wafar, Mohideen; Alvarez Salgado, Xosé; Aristegui, Javier; Gonzalez-davila, Melchor; Pazo Fernandez, Maria José; Rellan, Trinidad; Rios, Aida; Bingler, Linda; Groupe CITHER 3. |
| De mi-janvier à début avril 1995 s'est déroulée la campagne CITHER 3 du programme WOCE-France, dans le but d'étudier les écoulements aux frontières méridiennes du bassin Atlantique Sud-Est: à l'ouest, les échanges avec les Bassins d'Argentine et du Brésil, et à l'est, les écoulements le long du talus continental Africain. Les paramètres hydrologiques et géochimiques requis par le Programme Hydrologique de WOCE (WHP) ont été mesurés de la surface au fond à 242 stations situées le long de deux radiales, l'une à 9° W entre le talus continental Ivoirien et la latitude 45° S, l'autre de Cape Town à la position 40° S - 10° E, puis au talus continental Ghanéen. Ce rapport, qui est le troisième volume de la série des recueils de données CITHER 3, présente les... |
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| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00238/34920/33291.pdf |
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| Mercier, Herle; Billant, Andre; Branellec, Pierre; Morin, Pascal; Messias, Marie-josé; Memery, Laurent; Thomas, Catherine; Honnorez, Jose. |
| La campagne Romanche 1 s'est déroulée du 10 août au 7 septembre 1991, en un leg Dakar-Dakar, à bord du navire de recherche océanographique de l'Ifremer L'Atalante. Romanche 1, première campagne dans le cadre du projet Romanche, avait pour but d'explorer l'hydrologie et la bathymétrie des zones de fracture Romanche et Chain centrées respectivement à l'équateur et vers 1°S dans l'Atlantique. L'analyse des données recueillies fournira l'information nécessaire à la définition et au positionnement de mouillages courantométriques qui permettront de mesurer le flux d'Eau Antarctique de Fond (EAF) passant du bassin Ouest au bassin Est de l'Atlantique par ces 2 zones de fracture. Quatre mouillages seront déployés dans la zone de fracture Romanche, 4 dans la zone de... |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00233/34414/32811.pdf |
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| Morin, Pascal; Erad-le Denn, E.; Maguer, Ff; Madec, C.; Videau, C.; Le Grand, J; Mace, E.. |
| Différentes espèces phytoplanctoniques ont été à l'origine d'efflorescences toxiques sur l'ensemble du littoral français ces dernières années. Parmi celles-ci, les efflorescences de l'espèce Alexandrium minutum s'avèrent comme particulièrement dangereuses. Cette espèce produit des toxines paralysantes responsables chez l'homme du syndrome PSP ("Paralytic Shellfish Poisoning"). Les incidences des eaux colorées pour les activités économiques se traduisent par des interdictions préfectorales de commercialisation et de ramassage des mollusques filtreurs pouvant entraîner des pertes financières non négligeables pour les professionnels (ostréiculteurs, mytiliculteurs, ... ) ainsi qu'un préjudice sur l'image de marque des zones contaminées pour la fréquentation... |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00132/24306/22304.pdf |
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| Oms, Pierre-emmanuel; Bailly Du Bois, Pascal; Dumas, Franck; Lazure, Pascal; Morillon, Mehdi; Voiseux, Claire; Le Corre, Cedric; Cossonnet, Catherine; Solier, Luc; Morin, Pascal. |
| Tritium concentrations in oceans were compiled from the literature, online databases and original measurements in order to determine the global distribution of tritium concentrations according to latitude and depth in all oceans. The total inventory of tritium decay corrected in 2016 has been estimated using evaluation of the natural and artificial contributions in 23 spatial subdivisions of the total ocean. It is determined equal to 26.8 ± 14 kg including 3.8 kg of cosmogenic tritium. That is in agreement with the total atmospheric input of tritium from nuclear bomb tests and the natural inventory at steady-state estimated from natural production rates in the literature (27.8–29.3 kg in the Earth). We confirm the global increase in tritium according to... |
| Tipo: Text |
Palavras-chave: Radionuclide; Tracer; Database; Background concentration. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00470/58157/60653.pdf |
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| Morin, Pascal; Durand, Dominique; Puillat, Ingrid; Farcy, Patrick. |
| The objectives of JERICO are to address the challenge of observing the complexity and high variability of coastal areas at Pan-european level, in the framework established by European Directives (WFD, MSFD) and the operational marine services (GMES) by: - setting up an European Research Infrastructure for coastal observations based on existing systems in European coastal and shelf seas. - supporting standardization of methodologies for the benefit of data quality, data availability and cost efficiency. - promoting the cost-effective use of the facilities. - stimulating the development of new automated systems for the operational monitoring of the coastal marine, environment, with focus on the biochemical, compartment. To reach these objectives the JERICO... |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00125/23613/21451.pdf |
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| Treguer, Paul; Goberville, Eric; Barrier, Nicolas; L'Helguen, Stephane; Morin, Pascal; Bozec, Yann; Rimmelin-maury, Peggy; Czamanski, Marie; Grossteffan, Emilie; Cariou, Thierry; Repecaud, Michel; Quemener, Loic. |
| There is now a strong scientific consensus that coastal marine systems of Western Europe are highly sensitive to the combined effects of natural climate variability and anthropogenic climate change. However, it still remains challenging to assess the spatial and temporal scales at which climate influence operates. While large-scale hydro-climatic indices, such as the North Atlantic Oscillation (NAO) or the East Atlantic Pattern (EAP) and the weather regimes such as the Atlantic Ridge (AR), are known to be relevant predictors of physical processes, changes in coastal waters can also be related to local hydro-meteorological and geochemical forcing. Here, we study the temporal variability of physical and chemical characteristics of coastal waters located at... |
| Tipo: Text |
Palavras-chave: Coastal systems; Climate variability; Large-scale hydro-climatic indices; River inputs; Time-series; Weather regimes. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00192/30327/28801.pdf |
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| D'Ortenzio, Fabrizio; Lavigne, Heloise; Besson, Florent; Claustre, Herve; Coppola, Laurent; Garcia, Nicole; Laes-huon, Agathe; Le Reste, Serge; Malarde, Damien; Migon, Christophe; Morin, Pascal; Mortier, Laurent; Poteau, Antoine; Prieur, Louis; Raimbault, Patrick; Testor, Pierre. |
| Two profiling floats, equipped with nitrate concentration sensors were deployed in the northwestern Mediterranean from summer 2012 to summer 2013. Satellite ocean color data were extracted to evaluate surface chlorophyll concentration at float locations. Time series of mixed layer depths and nitrate and chlorophyll concentrations were analyzed to characterize the interplay between the physical-chemical and biological dynamics in the area. Deep convection (mixed layer depth > 1000 m) was observed in January–February, although high-nitrate surface concentrations could be already observed in December. Chlorophyll increase is observed since December, although high values were observed only in March. The early nitrate availability in subsurface layers, which... |
| Tipo: Text |
Palavras-chave: Bio-Argo; Mediterranean; Mixed layer; Bloom onset; Nitrate concentration; Ocean color satellite. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00211/32225/30673.pdf |
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| 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 |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00197/30785/29143.pdf |
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| Morin, Pascal; Louarn, Essylt; Thoumelin, Guy; Sevin, Laure; Cariou, Thierry; Mace, Eric. |
| Le nord de l'Atlantique Nord est le lieu de formation de l'eau profonde Nord Atlantique, composante essentielle de la circulation thermohaline. Le travail faisant l'objet du présent contrat avait pour objet de réaliser des mesures de composants biogéochimiques des masses d'eau le long d'une radiale allant du Groenland au Portugal en 2008 (section OVIDE). Les différentes composantes constituant l'eau profonde Nord Atlantique ont été échantillonnées. Ces mesures complètent des observations déjà effectuées par la même équipe en 2002,2004 et 2006. La mise en perspective temporelle de l'ensemble de ces données donne des informations sur la variabilité des masses d'eau océanique et par extension de la circulation. |
| Tipo: Text |
Palavras-chave: Masses d'eau; Atlantique Nord; Variabilité. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00431/54258/55588.pdf |
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| Puillat, Ingrid; Farcy, Patrick; Durand, Dominique; Petihakis, George; Morin, Pascal; Kriegger, Magali; Petersen, Wilhelm; Tintoré, Joaquin; Sorensen, Kai; Sparnocchia, Stefania; Wehde, Henning. |
| The JERICO European research infrastructure (RI) is integrating several platform types i.e. fixed buoys, piles, moorings, drifters, Ferryboxes, gliders, HF radars, coastal cable observatories and the associated technologies dedicated to the observation and monitoring of the European coastal seas. The infrastructure is to serve both the implementation of European marine policies and the elucidation of key scientific questions through dedicated observation and monitoring plans. It includes observations of the physical, chemical and biological compartments and aims at a better integration of marine biology with physical and chemical oceanology, through specific interactions with other relevant ocean observing systems that provide complementary observations.... |
| Tipo: Text |
Palavras-chave: Coastal Observatory Harmonization valorization; Open access. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00295/40664/49965.pdf |
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| Lherminier, Pascale; Mercier, Herle; Huck, Thierry; Gourcuff, Claire; Perez, Fiz F.; Morin, Pascal; Sarafanov, Artem; Falina, Anastasia. |
| The horizontal circulation of the subpolar gyre and the Meridional Overturning Circulation (MOC) are investigated here by comparing two snapshots of the North Atlantic as delivered by two hydrographic sections between Greenland and Portugal. The corresponding cruises were carried out in June–July 2002 and June–July 2004 on R/V Thalassa within the framework of the Ovide project. The absolute transports in June 2004 are described in detail, and then compared with transports in June 2002. The MOC (in density coordinates), driven by the volume balance between the northward North Atlantic Current (NAC) and the net southward export of dense water from the subpolar gyre, did not change: View the MathML source (1 Sv=106 m3 s−1). Its upper limb, above σ1=32.1, is... |
| Tipo: Text |
Palavras-chave: North Atlantic; Subpolar gyre; Meridional Overturning Circulation; OVIDE; Hydrology; ADCP. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00011/12272/9057.pdf |
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| Morin, Pascal; Krieger, Magali; Durand, Dominique; Puillat, Ingrid; Farcy, Patrick. |
| This document is summarizing a major part of the work performed by the FP7-JERICO consortium, including 27 partner institutions, during 4 years (2011-2015). Its objective is to propose a strategy for the European coastal observation and monitoring. To do so we give an overview of the main achievements of the FP7-JERICO project. From this overview, gaps are analysed to draw some recommendations for the future. Overview, gaps and recommendation are addressed at both Hardware and Software levels of the JERICO Research Infrastructure. The main part of the document is built upon this analysis to outcome a general strategy for the future, giving priorities to be targeted and some possible funding mechanisms, but also upon discussions held in dedicated JERICO... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00349/46022/45696.pdf |
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| Registros recuperados: 17 | |
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