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| Registros recuperados: 50 | |
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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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| Maze, Guillaume; Cabanes, Cecile; Carval, Thierry; Coatanoan, Christine; D'Ortenzio, Fabrizio; Kolodziejczyk, Nicolas; Lebreton, Nathanaele; Le Traon, Pierre-yves; Poffa, Noe; Pouliquen, Sylvie; Thierry, Virginie. |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00318/42967/42474.pdf |
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| Bellacicco, Marco; Ciani, Daniele; Doxaran, David; Vellucci, Vincenzo; Antoine, David; Wang, Menghua; D'Ortenzio, Fabrizio; Marullo, Salvatore. |
| Currently, observations from low-Earth orbit (LEO) ocean color sensors represent one of the most used tools to study surface optical and biogeochemical properties of the ocean. LEO observations are available at daily temporal resolution, and are often combined into weekly, monthly, seasonal, and annual averages in order to obtain sufficient spatial coverage. Indeed, daily satellite maps of the main oceanic variables (e.g., surface phytoplankton chlorophyll-a) generally have many data gaps, mainly due to clouds, which can be filled using either Optimal Interpolation or the Empirical Orthogonal Functions approach. Such interpolations, however, may introduce large uncertainties in the final product. Here, our goal is to quantify the potential benefits of... |
| Tipo: Text |
Palavras-chave: Remote sensing; Ocean color products; Geostationary sensor; Baltic Sea. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00585/69693/67578.pdf |
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| Maze, Guillaume; Cabanes, Cecile; Coatanoan, Christine; D'Ortenzio, Fabrizio; Lebreton, Nathanaele; Le Reste, Serge; Le Traon, Pierre-yves; Mamaca, Emina; Pouliquen, Sylvie; Thierry-theetten, Virginie. |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00180/29100/27514.pdf |
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| Maze, Guillaume; Cabanes, Cécile; Carval, Thierry; Coatanoan, Christine; D'Ortenzio, Fabrizio; Lebreton, Nathanaelle; Le Reste, Serge; Le Traon, Pierre-yves; Pouliquen, Sylvie; Thierry, Virginie. |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00254/36504/35050.pdf |
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| Caputi, Luigi; Carradec, Quentin; Eveillard, Damien; Kirilovsky, Amos; Pelletier, Eric; Karlusich, Juan J. Pierella; Vieira, Fabio Rocha Jimenez; Villar, Emilie; Chaffron, Samuel; Malviya, Shruti; Scalco, Eleonora; Acinas, Silvia G.; Alberti, Adriana; Aury, Jean-marc; Benoiston, Anne-sophie; Bertrand, Arnaud; Biard, Tristan; Bittner, Lucie; Boccara, Martine; Brum, Jennifer R.; Brunet, Cedric; Busseni, Greta; Carratala, Anna; Claustre, Herve; Coelho, Luis Pedro; Colin, Sbastien; D'Aniello, Salvatore; Da Silva, Corinne; Del Core, Marianna; Dore, Hugo; Gasparini, Stephane; Kokoszka, Florian; Jamet, Jean-louis; Lejeusne, Christophe; Lepoivre, Cyrille; Lescot, Magali; Lima-mendez, Gipsi; Lombard, Fabien; Lukes, Julius; Maillet, Nicolas; Madoui, Mohammed-amin; Martinez, Elodie; Mazzocchi, Maria Grazia; Neou, Mario B.; Paz-yepes, Javier; Poulain, Julie; Ramondenc, Simon; Romagnan, Jean-baptiste; Roux, Simon; Manta, Daniela Salvagio; Sanges, Remo; Speich, Sabrina; Sprovieri, Mario; Sunagawa, Shinichi; Taillandier, Vincent; Tanaka, Atsuko; Tirichine, Leila; Trottier, Camille; Uitz, Julia; Veluchamy, Alaguraj; Vesela, Jana; Vincent, Flora; Yau, Sheree; Kandels-lewis, Stefanie; Searson, Sarah; Dimier, Cline; Picheral, Marc; Bork, Peer; Boss, Emmanuel; De Vargas, Colomban; Follows, Michael J.; Grimsley, Nigel; Guidi, Lionel; Hingamp, Pascal; Karsenti, Eric; Sordino, Paolo; Stemmann, Lars; Sullivan, Matthew B.; Tagliabue, Alessandro; Zingone, Adriana; Garczarek, Laurence; D'Ortenzio, Fabrizio; Testor, Pierre; Not, Fabrice; D'Alcala, Maurizio Ribera; Wincker, Patrick; Bowler, Chris; Iudicone, Daniele; Gorsky, Gabriel; Jaillon, Olivier; Karp-boss, Lee; Krzic, Uros; Ogata, Hiroyuki; Pesant, Stephane; Raes, Jeroen; Reynaud, Emmanuel G.; Sardet, Christian; Sieracki, Mike; Velayoudon, Didier; Weissenbach, Jean. |
| Predicting responses of plankton to variations in essential nutrients is hampered by limited in situ measurements, a poor understanding of community composition, and the lack of reference gene catalogs for key taxa. Iron is a key driver of plankton dynamics and, therefore, of global biogeochemical cycles and climate. To assess the impact of iron availability on plankton communities we explored the comprehensive bio‐oceanographic and ‐omics datasets from Tara Oceans in the context of the iron products from two state‐of‐the‐art global scale biogeochemical models. We obtained novel information about adaptation and acclimation towards iron in a range of phytoplankton, including picocyanobacteria and diatoms, and identified whole sub‐communities co‐varying with... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00475/58680/61184.pdf |
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| Le Reste, Serge; Andre, Xavier; Claustre, Herve; D'Ortenzio, Fabrizio; Poteau, Antoine. |
| The anthropogenic greenhouse effect and the associated temperature rise of the planet represent the main challenging issue for the Earth sciences of the next century. Marine ecosystems are a key component of the Earth system, as they modulate the transfer of greenhouse gases (mainly CO2) to the ocean surface. Moreover, oceanic ecosystems mitigate the effects of anthropogenic carbon injection into the atmosphere, via the so-called “biological pump”. Ocean biogeochemistry is hence confronted to a major challenge: the determination of the extent and efficiency of the climatic feedback of the carbon “biological pump” within the context of climate change. A new type of float, the “ProvBio”, has been developed jointly by Ifremer and the French company KANNAD,... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00219/32998/31455.pdf |
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| Barbieux, Marie; Uitz, Julia; Bricaud, Annick; Organelli, Emanuele; Poteau, Antoine; Schmechtig, Catherine; Gentili, Bernard; Obolensky, Grigor; Leymarie, Edouard; Penkerc'H, Christophe; D'Ortenzio, Fabrizio; Claustre, Herve. |
| Characterizing phytoplankton distribution and dynamics in the world's open oceans requires in situ observations over a broad range of space and time scales. In addition to temperature/salinity measurements, Biogeochemical-Argo (BGC-Argo) profiling floats are capable of autonomously observing at high-frequency bio-optical properties such as the chlorophyll fluorescence, a proxy of the chlorophyll a concentration (Chla), the particulate backscattering coefficient (b(bp)), a proxy of the stock of particulate organic carbon, and the light available for photosynthesis. We analyzed an unprecedented BGC-Argo database of more than 8,500 multivariable profiles collected in various oceanic conditions, from subpolar waters to subtropical gyres. Our objective is to... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00673/78495/80780.pdf |
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| Guinet, Christophe; Xing, X.; Walker, E; Monestiez, P; Marchand, S.; Picard, Baptiste; Jaud, T.; Authier, Matthieu; Cotte, Cedric; Dragon, Ac; Diamond, E; Antoine, David; Lovell, P.; Blain, Stephane; D'Ortenzio, Fabrizio; Claustre, Herve. |
| In situ observation of the marine environment has traditionally relied on ship-based platforms. The obvious consequence is that physical and biogeochemical properties have been dramatically undersampled, especially in the remote Southern Ocean (SO). The difficulty in obtaining in situ data represents the major limitations to our understanding, and interpretation of the coupling between physical forcing and the biogeochemical response. Southern elephant seals (Mirounga leonina) equipped with a new generation of oceanographic sensors can measure ocean structure in regions and seasons rarely observed with traditional oceanographic platforms. Over the last few years, seals have allowed for a considerable increase in temperature and salinity profiles from the... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00185/29663/28034.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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| Taillandier, Vincent; Wagener, Thibaut; D'Ortenzio, Fabrizio; Mayot, Nicolas; Legoff, Herve; Ras, Josephine; Coppola, Laurent; Pasqueron De Fommervault, Orens; Schmechtig, Catherine; Diamond, Emilie; Bittig, Henry; Lefevre, Dominique; Leymarie, Edouard; Poteau, Antoine; Prieur, Louis. |
| We report on data from an oceanographic cruise, covering western, central and eastern parts of the Mediterranean Sea, on the French research vessel Tethys 2 in May 2015. This cruise was fully dedicated to the maintenance and the metrological verification of a biogeochemical observing system based on a fleet of BGC-Argo floats. During the cruise, a comprehensive data set of parameters sensed by the autonomous network was collected. The measurements include ocean currents, seawater salinity and temperature, and concentrations of inorganic nutrients, dissolved oxygen and chlorophyll pigments. The analytical protocols and data processing methods are detailed, together with a first assessment of the calibration state for all the sensors deployed during the... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00677/78943/81333.pdf |
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| Djaoudi, Kahina; Van Wambeke, France; Coppola, Laurent; D'Ortenzio, Fabrizio; Helias-nunige, Sandra; Raimbault, Patrick; Taillandier, Vincent; Testor, Pierre; Wagener, Thibaut; Pulido-villena, Elvira. |
| An accurate understanding of the biogeochemistry of dissolved phosphate pool in the upper waters of P-depleted oceanic regions is constrained by the low sensitivity of routine phosphate measurements. In this study, by using the sensitive Liquid Waveguide Capillary Cell method, we report the first extensive cross-basin survey of nanomolar dissolved inorganic phosphate (DIP) and dissolved organic phosphate (DOP) concentration in P-depleted surface waters of the Mediterranean Sea during the stratification period. In the north western Mediterranean Sea (NWMS), DIP above the mixed layer depth (MLD) ranged between 4.9 and 26.5 nM. Along an E-W transect crossing Ionian and Tyrrhenian Seas (E-W transect), DIP above the MLD was lower, ranging between 0.9 and 11.4... |
| Tipo: Text |
Palavras-chave: The Mediterranean Sea; Dissolved inorganic phosphate; Dissolved organic phosphate; N:P ratios; Liquid waveguide capillary cell. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00450/56184/57731.pdf |
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| Kolodziejczyk, Nicolas; Carval, Thierry; Claustre, Hervé; D'Ortenzio, Fabrizio; Lebreton, Nathanaele; Le Traon, Pierre-yves; Maze, Guillaume; Poffa, Noe; Pouliquen, Sylvie; Poteau, Antoine; Schmechtig, Catherine; Thierry, Virginie. |
| To ensure the maintenance of the international Argo network of autonomous profiling float (www.argo.net), France is committed to contribute to deploy a significant part of the global network (around 10%). The profiling floats of the Argo-France program are founded by Ifremer and SHOM, supported by the French “Ministère de l’Enseignement Supérieur, de la Recherche et de l’Innovation” funding via the “Très Grande Infrastructure de recherche” (TGIR), “Contrat de Plan État-Région” (CPER), PIA projects such as Equipex NAOS, and CNES. These purchases are part of the Coriolis inter-agency partnership. Between 50 and 70 T/S type profiling floats (Temperature / Salinity), T / S / DO (Dissolved Oxygen), Deep (Deep) and BGC (Biogeochemical) are purchased each year. A... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00481/59297/61991.pdf |
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| Schmechtig, Catherine; Poteau, Antoine; Claustre, Hervé; D'Ortenzio, Fabrizio; Dall'Olmo, Giorgio; Boss, Emmanuel. |
| This document does NOT address the issue of particle backscattering quality control (either real-time or delayed mode). As a preliminary step towards that goal, this document seeks to ensure that all countries deploying floats equipped with backscattering sensors document the data and metadata related to these floats properly. We produced this document in response to action item 9 from the first Bio-Argo Data Management meeting in Hyderabad (November 12-13, 2012). If the recommendations contained herein are followed, we will end up with a more uniform set of particle backscattering data within the Bio-Argo data system, allowing users to begin analyzing not only their own particle backscattering data, but also those of others, in the true spirit of Argo... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00283/39459/56146.pdf |
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| Maze, Guillaume; Andre, Xavier; Cabanes, Cécile; Carval, Thierry; Claustre, Hervé; Coatanoan, Christine; D'Ortenzio, Fabrizio; Kolodziejczyk, Nicolas; Lebreton, Nathanaele; Le Traon, Pierre-yves; Poteau, Antoine; Poffa, Noe; Pouliquen, Sylvie; Sauzede, Raphaëlle; Schmechtig, Catherine; Thierry, Virginie. |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00620/73198/72392.pdf |
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| Xing, Xiaogang; Claustre, Herve; Blain, Stephane; D'Ortenzio, Fabrizio; Antoine, David; Ras, Josephine; Guinet, Christophe. |
| As the proxy for Chlorophyll a (Chl a) concentration, thousands of fluorescence profiles were measured by instrumented elephant seals in the Kerguelen region (Southern Ocean). For accurate retrieval of Chl a concentrations acquired by in vivo fluorometer, a two-step procedure is applied: 1) A predeployment intercalibration with accurate determination by high performance liquid chromatography (HPLC) analysis, which not only calibrates fluorescence in appropriate Chl a concentration units, but also strongly reduces variability between fluorometers, and 2) a profile-by-profile quenching correction analysis, which effectively eliminates the fluorescence quenching issue at surface around noon, and results in consistent profiles between day and night. The... |
| Tipo: Text |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00248/35965/36927.pdf |
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| Testor, Pierre; Mortier, Laurent; Karstensen, Johannes; Mauri, Elena; Heywood, Karen J.; Hayes, Dan; Alenius, Pekka; Alvarez, Alberto; Barrera, Carlos; Beguery, Laurent; Bernardet, Karim; Bertino, Laurent; Beszczynska-moller, Agnieszka; Carval, Thierry; Counillon, François; Dumont, Estelle; Griffiths, Gwyn; Haugan, Peter M; Kaiser, Jan; Kasis, Dimitri; Krahmann, Gerd; Llinas, Octavio; Merckelbach, Lucas; Mourre, Baptiste; Nittis, Kostas; Onken, Reiner; D'Ortenzio, Fabrizio; Pouliquen, Sylvie; Proelss, Alexander; Riethmuller, Rolf; Ruiz, Simon; Sherwin, Toby; Smeed, David; Stemmann, Lars; Tikka, Kimmo; Tintore, Joaquin. |
| Tipo: Text |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00114/22554/20242.pdf |
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| Estournel, Claude; Testor, Pierre; Taupier-letage, Isabelle; Bouin, Marie-noelle; Coppola, Laurent; Durand, Pierre; Conan, Pascal; Bosse, Anthony; Brilouet, Pierre-etienne; Beguery, Laurent; Belamari, Sophie; Beranger, Karine; Beuvier, Jonathan; Bourras, Denis; Canut, Guylaine; Doerenbecher, Alexis; Durrieu De Madron, Xavier; D'Ortenzio, Fabrizio; Drobinski, Philippe; Ducrocq, Veronique; Fourrie, Nadia; Giordani, Herve; Houpert, Loic; Labatut, Laurent; Brossier, Cindy Lebeaupin; Nuret, Mathieu; Prieur, Louis; Roussot, Odile; Seyfried, Leo; Somot, Samuel. |
| The HYdrological cycle in the Mediterranean Experiment (HyMeX) Special Observing Period 2 (SOP2, January 27–March 15, 2013) was dedicated to the study of dense water formation in the Gulf of Lion in the northwestern Mediterranean. This paper outlines the deep convection of winter 2012–2013 and the meteorological conditions that produced it. Alternating phases of mixing and restratification are related to periods of high and low heat losses, respectively. High-resolution, realistic, three-dimensional models are essential for assessing the intricacy of buoyancy fluxes, horizontal advection, and convective processes. At the submesoscale, vertical velocities resulting from symmetric instabilities of the density front bounding the convection zone are crucial... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00386/49688/50224.pdf |
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| Schmechtig, Catherine; Poteau, Antoine; Claustre, Hervé; D'Ortenzio, Fabrizio; Boss, Emmanuel. |
| This document does NOT address the issue of chlorophyll-a quality control (either real-time or delayed mode). As a preliminary step towards that goal, this document seeks to ensure that all countries deploying floats equipped with chlorophyll-a sensors document the data and metadata related to these floats properly. We produced this document in response to action item 3 from the first Bio-Argo Data Management meeting in Hyderabad (November 12-13, 2012). If the recommendations contained herein are followed, we will end up with a more uniform set of chlorophyll-a data within the Bio-Argo data system, allowing users to begin analyzing not only their own chlorophyll-a data, but also those of others, in the true spirit of Argo data sharing. |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00283/39468/37945.pdf |
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| Registros recuperados: 50 | |
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