Consulta: creatorFacets:"D'Ortenzio, Fabrizio"
Registros recuperados: 50
Data/hora: 02/06/2024 00:58:11

Observing mixed layer depth, nitrate and chlorophyll concentrations in the northwestern Mediterranean: A combined satellite and NO  3  profiling floats experiment
Provedor de dados: 5
Autores: 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 &gt; 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

French National Report on Argo - 2015. Present status and future plans
Provedor de dados: 5
Autores: 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
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00318/42967/42474.pdf

Assessing the Potential Benefits of the Geostationary Vantage Point for Generating Daily Chlorophyll-a Maps in the Baltic Sea
Provedor de dados: 5
Autores: 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

French National Report on Argo -­ 2013. Present status and future plans
Provedor de dados: 5
Autores: 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
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00180/29100/27514.pdf

French National Report on Argo - 2014. Present status and future plans
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00254/36504/35050.pdf

Community-Level Responses to Iron Availability in Open Ocean Planktonic Ecosystems
Provedor de dados: 5
Autores: 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
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00475/58680/61184.pdf

First success of ProvBIO floats
Provedor de dados: 5
Autores: 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
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00219/32998/31455.pdf

Assessing the Variability in the Relationship Between the Particulate Backscattering Coefficient and the Chlorophyll a Concentration From a Global Biogeochemical-Argo Database
Provedor de dados: 5
Autores: 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
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00673/78495/80780.pdf

Bio-Argo quality control manual for the Chlorophyll-A concentration
Provedor de dados: 5
Autores: Schmechtig, Catherine; Claustre, Herve; Poteau, Antoine; D'Ortenzio, Fabrizio.
This document is the bio-Argo quality control manual for Chlorophyll A concentration. It describes the method used in real-time to apply quality control flags to Chlorophyll A concentration calculated from specific sensors mounted on Argo profiling floats.
Tipo: Text
Palavras-chave: Argo; Physical oceanography; In-situ marine data; Profiling floats; Chlorophyll; Operational oceanography; Biogeochemistry.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00243/35385/60181.pdf

Calibration procedures and first dataset of Southern Ocean chlorophyll a profiles collected by elephant seals equipped with a newly developed CTD-fluorescence tags
Provedor de dados: 5
Autores: 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
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00185/29663/28034.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

Hydrography and biogeochemistry dedicated to the Mediterranean BGC-Argo network during a cruise with RV Tethys 2 in May 2015
Provedor de dados: 5
Autores: 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
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00677/78943/81333.pdf

Sensitive Determination of the Dissolved Phosphate Pool for an Improved Resolution of Its Vertical Variability in the Surface Layer: New Views in the P-Depleted Mediterranean Sea
Provedor de dados: 5
Autores: 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

Stratégie nationale pour les déploiements d'opportunité des profileurs du réseau global Argo
Provedor de dados: 5
Autores: 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
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59297/61991.pdf

Processing Bio-Argo particle backscattering at the DAC level
Provedor de dados: 5
Autores: 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
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00283/39459/56146.pdf

French National Report on Argo - 2019
Provedor de dados: 5
Autores: 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
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00620/73198/72392.pdf

Quenching correction for in vivo chlorophyll fluorescence acquired by autonomous platforms: A case study with instrumented elephant seals in the Kerguelen region (Southern Ocean)
Provedor de dados: 5
Autores: 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
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00248/35965/36927.pdf

EGO : towards a global glider infrastructure for the benefit of marine research and operational oceanography
Provedor de dados: 5
Autores: 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
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00114/22554/20242.pdf

HyMeX-SOP2: The Field Campaign Dedicated to Dense Water Formation in the Northwestern Mediterranean
Provedor de dados: 5
Autores: 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
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00386/49688/50224.pdf

Processing bio-Argo chlorophyll-A concentration at the DAC level
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00283/39468/37945.pdf

Correction of profiles of in-situ chlorophyll fluorometry for the contribution of fluorescence originating from non-algal matter
Provedor de dados: 5
Autores: Xing, Xiaogang; Claustre, Herve; Boss, Emmanuel; Roesler, Collin; Organelli, Emanuele; Poteau, Antoine; Barbieux, Marie; D'Ortenzio, Fabrizio.
In situ chlorophyll fluorometers have been widely employed for more than half a century, and to date, it still remains the most used instrument to estimate chlorophyll-a concentration in the field, especially for measurements onboard autonomous observation platforms, e.g., Bio-Argo floats and gliders. However, in deep waters (&gt; 300 m) of some specific regions, e.g., subtropical gyres and the Black Sea, the chlorophyll fluorescence profiles frequently reveal "deep sea red fluorescence" features. In line with previous studies and through the analysis of a large data set (cruise transect in the South East Pacific and data acquired by 82 Bio-Argo floats), we show that the fluorescence signal measured by a humic-like DOM fluorometer is highly correlated to...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00661/77327/78783.pdf

Argo Data 1999–2019: Two Million Temperature-Salinity Profiles and Subsurface Velocity Observations From a Global Array of Profiling Floats
Provedor de dados: 5
Autores: Wong, Annie P. S.; Wijffels, Susan E.; Riser, Stephen C.; Pouliquen, Sylvie; Hosoda, Shigeki; Roemmich, Dean; Gilson, John; Johnson, Gregory C.; Martini, Kim; Murphy, David J.; Scanderbeg, Megan; Bhaskar, T. V. S. Udaya; Buck, Justin J. H.; Merceur, Frederic; Carval, Thierry; Maze, Guillaume; Cabanes, Cécile; André, Xavier; Poffa, Noe; Yashayaev, Igor; Barker, Paul M.; Guinehut, Stéphanie; Belbéoch, Mathieu; Ignaszewski, Mark; Baringer, Molly O'Neil; Schmid, Claudia; Lyman, John M.; Mctaggart, Kristene E.; Purkey, Sarah G.; Zilberman, Nathalie; Alkire, Matthew B.; Swift, Dana; Owens, W. Brechner; Jayne, Steven R.; Hersh, Cora; Robbins, Pelle; West-mack, Deb; Bahr, Frank; Yoshida, Sachiko; Sutton, Philip J. H.; Cancouët, Romain; Coatanoan, Christine; Dobbler, Delphine; Juan, Andrea Garcia; Gourrion, Jerome; Kolodziejczyk, Nicolas; Bernard, Vincent; Bourlès, Bernard; Claustre, Hervé; D'Ortenzio, Fabrizio; Le Reste, Serge; Le Traon, Pierre-yves; Rannou, Jean Philippe; Saout-grit, Carole; Speich, Sabrina; Thierry, Virginie; Verbrugge, Nathalie; Angel-benavides, Ingrid M.; Klein, Birgit; Notarstefano, Giulio; Poulain, Pierre-marie; Vélez-belchí, Pedro; Suga, Toshio; Ando, Kentaro; Iwasaska, Naoto; Kobayashi, Taiyo; Masuda, Shuhei; Oka, Eitarou; Sato, Kanako; Nakamura, Tomoaki; Sato, Katsunari; Takatsuki, Yasushi; Yoshida, Takashi; Cowley, Rebecca; Lovell, Jenny L.; Oke, Peter R.; Van Wijk, Esmee M.; Carse, Fiona; Donnelly, Matthew; Gould, W. John; Gowers, Katie; King, Brian A.; Loch, Stephen G.; Mowat, Mary; Turton, Jon; Rama Rao, E. Pattabhi; Ravichandran, M.; Freeland, Howard J.; Gaboury, Isabelle; Gilbert, Denis; Greenan, Blair J. W.; Ouellet, Mathieu; Ross, Tetjana; Tran, Anh; Dong, Mingmei; Liu, Zenghong; Xu, Jianping; Kang, Kiryong; Jo, Hyeongjun; Kim, Sung-dae; Park, Hyuk-min.
In the past two decades, the Argo Program has collected, processed, and distributed over two million vertical profiles of temperature and salinity from the upper two kilometers of the global ocean. A similar number of subsurface velocity observations near 1,000 dbar have also been collected. This paper recounts the history of the global Argo Program, from its aspiration arising out of the World Ocean Circulation Experiment, to the development and implementation of its instrumentation and telecommunication systems, and the various technical problems encountered. We describe the Argo data system and its quality control procedures, and the gradual changes in the vertical resolution and spatial coverage of Argo data from 1999 to 2019. The accuracies of the...
Tipo: Text
Palavras-chave: Global; Ocean; Pressure; Temperature; Salinity; Argo; Profiling; Floats.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76377/77385.pdf

Bio-Argo floats : Data management in progress...
Provedor de dados: 5
Autores: Schmechtig, Catherine; Poteau, Antoine; Claustre, Herve; D'Ortenzio, Fabrizio; Buck, Justin; Carval, Thierry.
In the context of the Bio-Argo program, a significant number of "new" biogeochemical variables are now candidate to be delivered through the Argo data stream. These variables are nitrate concentration, dissolved oxygen concentration, Chla concentration, backscattering coefficient, pH and radiometric data. Compared to the core Argo mission (P, T and 5), this diversity of new variable forces the community of biogeochemists to be very careful with respect to data management. Since three years, the community of biogeochemists thus actively participate to Argo data management meetings, in order to develop procedure for biogeochemical data compliant with Argo requirements regarding distribution policy, format, quality assessment and documentation. We illustrate...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00254/36542/35084.pdf

Two databases derived from BGC-Argo float measurements for marine biogeochemical and bio-optical applications
Provedor de dados: 5
Autores: Organelli, Emanuele; Barbieux, Marie; Claustre, Herve; Schmechtig, Catherine; Poteau, Antoine; Bricaud, Annick; Boss, Emmanuel; Briggs, Nathan; Dall'Olmo, Giorgio; D'Ortenzio, Fabrizio; Leymarie, Edouard; Mangin, Antoine; Obolensky, Grigor; Penkerc'H, Christophe; Prieur, Louis; Roesler, Collin; Serra, Romain; Uitz, Julia; Xing, Xiaogang.
Since 2012, an array of 105 Biogeochemical-Argo (BGC-Argo) floats has been deployed across the world's oceans to assist in filling observational gaps that are required for characterizing open-ocean environments. Profiles of biogeochemical (chlorophyll and dissolved organic matter) and optical (single-wavelength particulate optical backscattering, downward irradiance at three wavelengths, and photosynthetically available radiation) variables are collected in the upper 1000 m every 1 to 10 days. The database of 9837 vertical profiles collected up to January 2016 is presented and its spatial and temporal coverage is discussed. Each variable is quality controlled with specifically developed procedures and its time series is quality-assessed to identify issues...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00662/77389/79010.pdf

Le projet Equipex NAOS : l'observation globale des océans Préparation de la nouvelle décennie d'Argo
Provedor de dados: 5
Autores: Le Traon, Pierre-yves; D'Ortenzio, Fabrizio; Babin, Marcel; Claustre, Hervé; Pouliquen, Sylvie; Le Reste, Serge; Thierry, Virginie; Brault, Patrice; Guigue, Michel; Le Menn, Marc.
NAOS (Novel Argo Ocean observing System) is one of the 52 projects selected as part of the Equipex call for proposals from the French programme d'investissements d'avenir. The overall objective of the project is to consolidate and improve the French and European contribution to the international Argo observing system and to prepare the next decade of Argo. The challenge is to set up an effective monitoring of the world ocean and to strengthen French leadership in ocean and climate research and prediction.
Tipo: Text
Palavras-chave: Méthode d'observation océanographique; Réchauffement climatique; Prévision climatique; Salinité de l'eau; Température de l'eau; Océan mondial; Altimètre radar; CO2; Tempête; Cyclone tropical; Mousson; El-Niño; Circulation générale océanique; Climatologie océanographique; Modèle couplé océan-atmosphère; Modèle climatique.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22801/20608.pdf

Development and validation of the new ProvBioII float
Provedor de dados: 5
Autores: Leymarie, Edouard; Poteau, Antoine; Andre, Xavier; Besson, F; Brault, Patrice; Claustre, Herve; David, Arnaud; D'Ortenzio, Fabrizio; Dufour, A; Lavigne, Heloise; Le Reste, Serge; Le Traon, Pierre-yves; Migon, Christophe; Nogre, David; Obolensky, G; Penkerc'H, C; Sagot, Jerome; Schaeffer, Christophe; Schmechtig, C; Taillandier, V.
In the last ten years, a productive collaboration has grown between the Laboratoire d’Océanographie de Villefranche (LOV), NKE and IFREMER to implement biogeochemical sensors on profiling floats. A first project (2003) was dedicated to the design of the so-called ProvBio floats (models A and B) that consisted of a PROVOR-CTS3 float instrumented with three new optical sensors: a Wetlabs transmissometer (C-Rover), a 3-wavelength Satlantic radiometer (OCR-503) and an “ECO3” Wetlabs sensor, measuring chlorophyll-a fluorescence, colored dissolved organic matter and particle backscattering coefficients (see First Success of ProvBio floats, Coriolis Letter n°5). Then, the integration of biogeochemical sensors continued in the framework of ProNuts project (2009,...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00219/32989/31438.pdf

NAOS : preparing the new decade for Argo
Provedor de dados: 5
Autores: Le Traon, Pierre-yves; D'Ortenzio, Fabrizio; Babin, M.; Claustre, H.; Pouliquen, Sylvie; Le Reste, Serge; Thierry, Virginie; Brault, Patrice; Guigue, Michel; Le Menn, M.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22556/20244.pdf

French National Report on Argo - 2016. Present status and future plans
Provedor de dados: 5
Autores: Maze, Guillaume; Cabanes, Cecile; Carval, Thierry; Claustre, Hervé; Coatanoan, Christine; D'Ortenzio, Fabrizio; Kolodziejczyk, Nicolas; Lebreton, Nathanaele; Poteau, Antoine; Le Reste, Serge; Schmechtig, Catherine; Le Traon, Pierre-yves; Poffa, Noe; Pouliquen, Sylvie; Thierry, Virginie.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00397/50844/51615.pdf

Deep-Sea Bioluminescence Blooms after Dense Water Formation at the Ocean Surface
Provedor de dados: 5
Autores: Tamburini, Christian; Canals, Miquel; Durrieu De Madron, Xavier; Houpert, Loic; Lefevre, Dominique; Martini, Séverine; D'Ortenzio, Fabrizio; Robert, Anne; Testor, Pierre; Aguilar, Juan Antonio; Al Samarai, Imen; Albert, Arnaud; Andre, Michel; Anghinolfi, Marco; Anton, Gisela; Anvar, Shebli; Ardid, Miguel; Assis Jesus, Ana Carolina; Astraatmadja, Tri L.; Aubert, Jean-jacques; Baret, Bruny; Basa, Stephane; Bertin, Vincent; Biagi, Simone; Bigi, Armando; Bigongiari, Ciro; Bogazzi, Claudio; Bou-cabo, Manuel; Bouhou, Boutayeb; Bouwhuis, Mieke C.; Brunner, Jurgen; Busto, Jose; Camarena, Francisco; Capone, Antonio; Carloganu, Christina; Carminati, Giada; Carr, John; Cecchini, Stefano; Charif, Ziad; Charvis, Philippe; Chiarusi, Tommaso; Circella, Marco; Coniglione, Rosa; Costantini, Heide; Coyle, Paschal; Curtil, Christian; Decowski, Patrick; Dekeyser, Ivan; Deschamps, Anne; Donzaud, Corinne; Dornic, Damien; Dorosti, Hasankiadeh Q.; Drouhin, Doriane; Eberl, Thomas; Emanuele, Umberto; Ernenwein, Jean-pierre; Escoffier, Stephanie; Fermani, Paolo; Ferri, Marcelino; Flaminio, Vincenzo; Folger, Florian; Fritsch, Ulf; Fuda, Jean-luc; Galata, Salvatore; Gay, Pascal; Giacomelli, Giorgio; Giordano, Valentina; Gomez-gonzalez, Juan-pablo; Graf, Kay; Guillard, Goulven; Halladjian, Garadeb; Hallewell, Gregory; Van Haren, Hans; Hartman, Joris; Heijboer, Aart J.; Hello, Yann; Hernandez-rey, Juan Jose; Herold, Bjoern; Hossl, Jurgen; Hsu, Ching-cheng; De Jong, Marteen; Kadler, Matthias; Kalekin, Oleg; Kappes, Alexander; Katz, Uli; Kavatsyuk, Oksana; Kooijman, Paul; Kopper, Claudio; Kouchner, Antoine; Kreykenbohm, Ingo; Kulikovskiy, Vladimir; Lahmann, Robert; Lamare, Patrick; Larosa, Giuseppina; Lattuada, Dario; Lim, Gordon; Lo Presti, Domenico; Loehner, Herbert; Loucatos, Sotiris; Mangano, Salvatore; Marcelin, Michel; Margiotta, Annarita; Martinez-mora, Juan Antonio; Meli, Athina; Montaruli, Teresa; Moscoso, Luciano; Motz, Holger; Neff, Max; Nezri, Emmanuel; Palioselitis, Dimitris; Pavalas, Gabriela E.; Payet, Kevin; Payre, Patrice; Petrovic, Jelena; Piattelli, Paolo; Picot-clemente, Nicolas; Popa, Vlad; Pradier, Thierry; Presani, Eleonora; Racca, Chantal; Reed, Corey; Riccobene, Giorgio; Richardt, Carsten; Richter, Roland; Riviere, Colas; Roensch, Kathrin; Rostovtsev, Andrei; Ruiz-rivas, Joaquin; Rujoiu, Marius; Russo, Valerio G.; Salesa, Francisco; Sanchez-losa, Augustin; Sapienza, Piera; Schock, Friederike; Schuller, Jean-pierre; Schussler, Fabian; Shanidze, Rezo; Simeone, Francesco; Spies, Andreas; Spurio, Maurizio; Steijger, Jos J. M.; Stolarczyk, Thierry; Taiuti, Mauro G. F.; Toscano, Simona; Vallage, Bertrand; Van Elewyck, Veronique; Vannoni, Giulia; Vecchi, Manuela; Vernin, Pascal; Wijnker, Guus; Wilms, Jorn; De Wolf, Els; Yepes, Harold; Zaborov, Dmitry; Zornoza, Juan De Dios; Zuniga, Juan.
The deep ocean is the largest and least known ecosystem on Earth. It hosts numerous pelagic organisms, most of which are able to emit light. Here we present a unique data set consisting of a 2.5-year long record of light emission by deep-sea pelagic organisms, measured from December 2007 to June 2010 at the ANTARES underwater neutrino telescope in the deep NW Mediterranean Sea, jointly with synchronous hydrological records. This is the longest continuous time-series of deep-sea bioluminescence ever recorded. Our record reveals several weeks long, seasonal bioluminescence blooms with light intensity up to two orders of magnitude higher than background values, which correlate to changes in the properties of deep waters. Such changes are triggered by the...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00241/35256/33831.pdf

Quantifying the Impact of Linear Regression Model in Deriving Bio-Optical Relationships: The Implications on Ocean Carbon Estimations
Provedor de dados: 5
Autores: Bellacicco, Marco; Vellucci, Vincenzo; Scardi, Michele; Barbieux, Marie; Marullo, Salvatore; D'Ortenzio, Fabrizio.
Linear regression is widely used in applied sciences and, in particular, in satellite optical oceanography, to relate dependent to independent variables. It is often adopted to establish empirical algorithms based on a finite set of measurements, which are later applied to observations on a larger scale from platforms such as autonomous profiling floats equipped with optical instruments (e.g., Biogeochemical Argo floats; BGC-Argo floats) and satellite ocean colour sensors (e.g., SeaWiFS, VIIRS, OLCI). However, different methods can be applied to a given pair of variables to determine the coefficients of the linear equation fitting the data, which are therefore not unique. In this work, we quantify the impact of the choice of regression method (i.e., either...
Tipo: Text
Palavras-chave: Linear regression methods; Bio-optical properties; BGC-Argo; Satellite oceanography.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69689/67568.pdf

Profiling float observation of thermohaline staircases in the western Mediterranean Sea and impact on nutrient fluxes
Provedor de dados: 5
Autores: Taillandier, Vincent; Prieur, Louis; D'Ortenzio, Fabrizio; Ribera D'Alcala, Maurizio; Pulido-villena, Elvira.
Characterizing the spatio-temporal arrangements of inorganic nutrients is critical to improve our understanding of the marine biological primary production. Among the processes contributing to nutrient distributions, diapycnal diffusion plays a crucial role for the supply of nutrients to the surface productive zone, and for the equilibration of vertical differences in nutrient concentrations induced by large scale thermohaline circulation. This is the case in the western Mediterranean Sea, where Levantine intermediate waters (LIW), that circulate below the surface layer, regionally distribute the nutrient stocks conveyed from the eastern basin or provided by terrestrial inputs, atmospheric deposition, and remineralization of organic matter. In the present...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00603/71558/69978.pdf

Multiscale Observations of Deep Convection in the Northwestern Mediterranean Sea During Winter 2012-2013 Using Multiple Platforms
Provedor de dados: 5
Autores: Testor, Pierre; Bosse, Anthony; Houpert, Loic; Margirier, Felix; Mortier, Laurent; Legoff, Herve; Dausse, Denis; Labaste, Matthieu; Karstensen, Johannes; Hayes, Daniel; Olita, Antonio; Ribotti, Alberto; Schroeder, Katrin; Chiggiato, Jacopo; Onken, Reiner; Heslop, Emma; Mourre, Baptiste; D'Ortenzio, Fabrizio; Mayot, Nicolas; Lavigne, Heloise; De Fommervault, Orens; Coppola, Laurent; Prieur, Louis; Taillandier, Vincent; De Madron, Xavier Durrieu; Bourrin, Francois; Many, Gael; Damien, Pierre; Estournel, Claude; Marsaleix, Patrick; Taupier-letage, Isabelle; Raimbault, Patrick; Waldman, Robin; Bouin, Marie-noelle; Giordani, Herve; Caniaux, Guy; Somot, Samuel; Ducrocq, Veronique; Conan, Pascal.
During winter 2012-2013, open-ocean deep convection which is a major driver for the thermohaline circulation and ventilation of the ocean, occurred in the Gulf of Lions (Northwestern Mediterranean Sea) and has been thoroughly documented thanks in particular to the deployment of several gliders, Argo profiling floats, several dedicated ship cruises, and a mooring array during a period of about a year. Thanks to these intense observational efforts, we show that deep convection reached the bottom in winter early in February 2013 in a area of maximum 28±3 109m9. We present new quantitative results with estimates of heat and salt content at the sub-basin scale at different time scales (on the seasonal scale to a ten days basis) through optimal interpolation...
Tipo: Text
Palavras-chave: Ocean observation; Oceanic deep convection; Mediterranean Sea; Energy and buoyancy fluxes; Eddies; Plumes; Symmetric instability.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52639/53494.pdf

Process studies at the air-sea interface after atmospheric deposition in the Mediterranean Sea: objectives and strategy of the PEACETIME oceanographic campaign (May–June 2017)
Provedor de dados: 5
Autores: Guieu, Cécile; D'Ortenzio, Fabrizio; Dulac, François; Taillandier, Vincent; Doglioli, Andrea; Petrenko, Anne; Barrillon, Stéphanie; Mallet, Marc; Nabat, Pierre; Desboeufs, Karine.
In spring, the Mediterranean Sea, a well-stratified low nutrient low chlorophyll region, receives atmospheric deposition both desert dust from the Sahara and airborne particles from anthropogenic sources. Such deposition translates into a supply of new nutrients and trace metals for the surface waters that likely impact biogeochemical cycles. However, the quantification of the impacts and the processes involved are still far from being assessed in situ. In this paper, we provide a state of the art regarding dust deposition and its impact on the Mediterranean Sea biogeochemistry and we describe in this context the objectives and strategy of the PEACETIME project and cruise, entirely dedicated to filling this knowledge gap. Our strategy to go a step forward...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00611/72340/71224.pdf

Processing Bio-Argo nitrate concentration at the DAC Level
Provedor de dados: 5
Autores: Johnson, Ken; Pasqueron De Fommervault, Orens; Serra, Romain; D'Ortenzio, Fabrizio; Schmechtig, Catherine; Claustre, Hervé; Poteau, Antoine.
The only method used to date to measure dissolved nitrate concentration (NITRATE) with sensors mounted on profiling floats is based on the absorption of light at ultraviolet wavelengths by nitrate ion (Johnson and Coletti, 2002; Johnson et al., 2010; 2013; D’Ortenzio et al., 2012). Nitrate has a modest UV absorption band with a peak near 210 nm, which overlaps with the stronger absorption band of bromide, which has a peak near 200 nm. In addition, there is a much weaker absorption due to dissolved organic matter and light scattering by particles (Ogura and Hanya, 1966). The UV spectrum thus consists of three components, bromide, nitrate and a background due to organics and particles. The background also includes thermal effects on the instrument and slow...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00350/46121/55922.pdf

French National Report on Argo - 2018
Provedor de dados: 5
Autores: Maze, Guillaume; Cabanes, Cecile; Carval, Thierry; Claustre, Hervé; Coatanoan, Christine; D'Ortenzio, Fabrizio; Kolodziejczyk, Nicolas; Lebreton, Nathanaele; Le Reste, Serge; Le Traon, Pierre-yves; Poteau, Antoine; Poffa, Noe; Pouliquen, Sylvie; Schmechtig, Catherine; Thierry, Virginie.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59523/62497.pdf

Phytoplankton spring and fall blooms in the North Atlantic in the 1980s and 2000s
Provedor de dados: 5
Autores: Martinez, Elodie; Antoine, David; D'Ortenzio, Fabrizio; De Boyer Montegut, Clément.
Phytoplankton chlorophyll-a (Chl) seasonal cycles of the North Atlantic are described using satellite ocean color observations covering the 1980s and the 2000s. The study region is where warmer SST and higher Chl in the 2000s as compared to the 1980s have been reported. It covers latitudes from 30 degrees N-50 degrees N and longitudes from 60 degrees W-0 degrees W, where two phytoplankton blooms take place: a spring bloom that follows stratification of upper layers, and a fall bloom due to nutrient entrainment through deepening of the mixed layer. In the 1980s, spring and fall blooms were of similar amplitude over the entire study region. In the 2000s, the fall bloom was weaker in the eastern Atlantic (east of 40 degrees W), because of a delayed deepening...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00054/16556/14070.pdf

Recommendations for obtaining unbiased chlorophyll estimates from in situ chlorophyll fluorometers: A global analysis of WET Labs ECO sensors
Provedor de dados: 5
Autores: Roesler, Collin; Uitz, Julia; Claustre, Herve; Boss, Emmanuel; Xing, Xiaogang; Organelli, Emanuele; Briggs, Nathan; Bricaud, Annick; Schmechtig, Catherine; Poteau, Antoine; D'Ortenzio, Fabrizio; Ras, Josephine; Drapeau, Susan; Haentjens, Nils; Barbieux, Marie.
Chlorophyll fluorometers provide the largest in situ global data set for estimating phytoplankton biomass because of their ease of use, size, power consumption, and relatively low price. While in situ chlorophyll a (Chl) fluorescence is proxy for Chl a concentration, and hence phytoplankton biomass, there exist large natural variations in the relationship between in situ fluorescence and extracted Chl a concentration. Despite this large natural variability, we present here a global validation data set for the WET Labs Environmental Characterization Optics (ECO) series chlorophyll fluorometers that suggests a factor of 2 overestimation in the factory calibrated Chl a estimates for this specific manufacturer and series of sensors. We base these results on...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00384/49552/50046.pdf

Autonomously profiling the nitrate concentrations in the ocean : the Pronuts project
Provedor de dados: 5
Autores: D'Ortenzio, Fabrizio; Le Reste, Serge; Lavigne, Heloise; Besson, F.; Claustre, H.; Coppola, Laurent; Dufour, A.; Dutreuil, Vincent; Laes, Agathe; Leymarie, Edouard; Malarde, Damien; Mangin, A.; Migon, Christophe; Morin, P.; Poteau, A.; Prieur, L.; Raimbault, P.; Testor, Pierre.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22555/20243.pdf

SNO Argo-France. 2010-2014 report and 2015-2019 evolution
Provedor de dados: 5
Autores: Maze, Guillaume; D'Ortenzio, Fabrizio; Thierry, Virginie; Cabanes, Cecile; Schmechtig, Catherine; The Argo-france Management Board,; Argo-France Management Board.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00493/60435/63878.pdf

The Mediterranean subsurface phytoplankton dynamics and their impact on Mediterranean bioregions
Provedor de dados: 5
Autores: Palmiéri, Julien; Dutay, Jean-claude; D'Ortenzio, Fabrizio; Houpert, Loïc; Mayot, Nicolas; Bopp, Laurent.
Ocean bioregions are generally defined using remotely-sensed sea surface chlorophyll fields, based on the assumption that surface chlorophyll is representative of euphotic layer phytoplankton biomass. Here we investigate the impact of subsurface phytoplankton dynamics on the characterisation of ocean bioregions. The Mediterranean Sea is known for its contrasting bioregimes despite its limited area, and represents an appropriate case for this study. We modelled this area using a high resolution regional dynamical model, NEMO-MED12, coupled to a biogeochemical model, PISCES, and focused our analysis on the bioregions derived from lower trophic levels. Validated by satellite and Biogeochemical-Argo float observations, our model shows that chlorophyll...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00471/58219/60723.pdf

Bio-optical anomalies in the world's oceans: An investigation on the diffuse attenuation coefficients for downward irradiance derived from biogeochemical Argo float measurements
Provedor de dados: 5
Autores: Organelli, Emanuele; Claustre, Herve; Bricaud, Annick; Barbieux, Marie; Uitz, Julia; D'Ortenzio, Fabrizio; Dall'Olmo, Giorgio.
Identification of oceanic regions characterized by particular optical properties is extremely important for ocean color applications. The departure from globally established bio-optical models introduces uncertainties in the retrieval of biogeochemical quantities from satellite observations. Thanks to an array of 105 Biogeochemical Argo floats acquiring almost daily downward irradiance measurements at selected wavelengths in the UV and blue region of the spectrum, we re-examined the natural variability of the spectral diffuse attenuation coefficients, Kd(λ), among the world's oceans and compared them to previously established bio-optical models. The analysis of 2847 measurements of Kd(λ) at 380 and 490 nm, within the first optical depth, provided a...
Tipo: Text
Palavras-chave: Bio-optical anomalies; Light attenuation; Biogeochemical Argo floats; Global ocean; Colored dissolved organic matter.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00383/49463/49948.pdf

Interannual variability of the Mediterranean trophic regimes from ocean color satellites
Provedor de dados: 5
Autores: Mayot, Nicolas; D'Ortenzio, Fabrizio; D'Alcala, Maurizio Ribera; Lavigne, Heloise; Claustre, Herve.
D'Ortenzio and Ribera d'Alcalà (2009, DR09 hereafter) divided the Mediterranean Sea into "bioregions" based on the climatological seasonality (phenology) of phytoplankton. Here we investigate the interannual variability of this bioregionalization. Using 16 years of available ocean color observations (i.e. SeaWiFS and MODIS), we analyzed the spatial distribution of the DR09 trophic regimes on an annual basis. Additionally, we identified new trophic regimes, with seasonal cycles of phytoplankton biomass different from the DR09 climatological description and named "Anomalous". Overall, the classification of the Mediterranean phytoplankton phenology proposed by DR09 (i.e. "No Bloom", "Intermittently", "Bloom" and "Coastal"), is confirmed to be representative...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00309/42044/41346.pdf

QC Report. AtlantOS project
Provedor de dados: 5
Autores: Reverdin, Gilles; Thierry, Virginie; Utiz, Julia; D'Ortenzio, Fabrizio; Bradshaw, Elizabeth; Pfeil, Benjamin.
The purpose of task 1 in WP7 in AtlantOS project is to harmonize data exchange and data processing procedures for the EOVs that are acquired by multiple networks.   In this framework, the present report [D7.2] establishes recommendations for automatic quality control procedures in Near RT (a few hours to several days) for the core of 7 EOVs (measured by more than one of Networks involved in AtlantOS): • Physics : temperature (T), Salinity (T), Current for surface and subsurface and Sea level • Biogeochemistry : Oxygen (O2), Chlorophyll-A, Nitrate (NO3) and Carbon (pCO2) for surface and subsurface  The recommendations have been compiled by experts on those EOVs and validated by the Networks acquiring those EOVs in NRT (link with WP2, WP3 and WP4).  These...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00371/48244/48379.pdf

Regionalisation of the Mediterranean basin, a MERMEX synthesis
Provedor de dados: 5
Autores: Ayata, Sakina-dorothee; Irisson, Jean-olivier; Aubert, Anais; Berline, Leo; Dutay, Jean-claude; Mayot, Nicolas; Nieblas, Anne-elise; D'Ortenzio, Fabrizio; Palmieri, Julien; Reygondeau, Gabriel; Rossi, Vincent; Guieu, Cecile.
Regionalisation aims at delimiting provinces within which physical conditions, chemical properties, and biological communities are reasonably homogeneous. This article proposes a synthesis of the many recent regionalisations of the open-sea regions of the Mediterranean Sea. The nine studies considered here defined regions based on different, and sometimes complementary, criteria: dynamics of surface chlorophyll concentration, ocean currents, three-dimensional hydrological and biogeochemical properties, or the distribution of organisms. Although they identified different numbers and patterns of homogeneous regions, their compilation in the epipelagic zone identifies nine consensus frontiers, eleven consensus regions with relatively homogeneous conditions,...
Tipo: Text
Palavras-chave: Mediterranean Sea; Regionalisation; Biogeochemistry; Circulation; Mesoscale features; Epipelagic ocean; Management; Spatial planning.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00405/51673/52221.pdf

Preparing the New Phase of Argo: Scientific Achievements of the NAOS Project
Provedor de dados: 5
Autores: Le Traon, Pierre-yves; D'Ortenzio, Fabrizio; Babin, Marcel; Leymarie, Edouard; Marec, Claudie; Pouliquen, Sylvie; Thierry, Virginie; Cabanes, Cecile; Claustre, Hervé; Desbruyeres, Damien; Lacour, Leo; Lagunas, Jose-luis; Maze, Guillaume; Mercier, Herle; Penkerc'H, Christophe; Poffa, Noe; Poteau, Antoine; Prieur, Louis; Racape, Virginie; Randelhoff, Achim; Rehm, Eric; Schmechtig, Catherine Marie; Taillandier, Vincent; Wagener, Thibaut; Xing, Xiaogang.
Argo, the international array of profiling floats, is a major component of the global ocean and climate observing system. In 2010, the NAOS (Novel Argo Observing System) project was selected as part of the French “Investissements d’Avenir” Equipex program. The objectives of NAOS were to consolidate the French contribution to Argo’s core mission (global temperature and salinity measurements down to 2000 m), and also to develop the future generation of French Argo profiling floats and prepare the next phase of the Argo program with an extension to the deep ocean (Deep Argo), biogeochemistry (BGC-Argo) and polar seas. This paper summarizes how NAOS has met its objectives. The project significantly boosted France’s contribution to Argo’s core mission by...
Tipo: Text
Palavras-chave: Profiling floats; Deep ocean; Biogeochemistry; Mediterranean Sea; Arctic; Atlantic; Argo.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76584/77729.pdf

French National Report on Argo - 2017
Provedor de dados: 5
Autores: Maze, Guillaume; Cabanes, Cecile; Carval, Thierry; Claustre, Hervé; Coatanoan, Christine; D'Ortenzio, Fabrizio; Kolodziejczyk, Nicolas; Lebreton, Nathanaele; Poteau, Antoine; Le Reste, Serge; Schmechtig, Catherine; Le Traon, Pierre-yves; Poffa, Noe; Pouliquen, Sylvie; Thierry, Virginie.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54642/56063.pdf

Processing BGC-Argo CDOM concentration at the DAC level
Provedor de dados: 5
Autores: Schmechtig, Catherine; Organelli, Emanuele; Poteau, Antoine; Claustre, Hervé; D'Ortenzio, Fabrizio.
In the open ocean, Colored Dissolved Organic Matter (CDOM) is the fraction of the total Dissolved Organic Matter (DOM), composed by a mixture of chemically complex algal degradation products that interact with light. CDOM absorbs solar radiation in the UV and visible ranges (Bricaud et al., 1981) and, if illuminated, re-emits light as fluorescence (i.e., FDOM; Coble 1996). These optical measurements can be used as proxies of CDOM concentration. Whereas CDOM absorption measurements are given by the entire pool of the organic matter, FDOM measurements detect only sub-fractions. Depending on excitation and emission wavelengths of the fluorometer, FDOM can represent the fresh-material produced by microbial degradation of phytoplankton cells and/or from...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00434/54541/55910.pdf

Application file for renewal of the 'National Observation Service' label (INSU/CNRS) 2020-2024: SNO Argo-France
Provedor de dados: 5
Autores: Kolodziejczyk, Nicolas; Cabanes, Cecile; D'Ortenzio, Fabrizio; Maze, Guillaume; Pouliquen, Sylvie; Poteau, Antoine; Schmechtig, Catherine; Thierry, Virginie.
Application file for renewal of labeling as National Observation Service of SNO Argo-France with INSU for the period 2020-2024. This document presents the results of SNO Argo France's activities over the 2015-2019 labeling period; and sets targets for the period 2020-2024.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00499/61055/64484.pdf

Challenges for Sustained Observing and Forecasting Systems in the Mediterranean Sea
Provedor de dados: 5
Autores: Tintoré, Joaquín; Pinardi, Nadia; Álvarez-fanjul, Enrique; Aguiar, Eva; Álvarez-berastegui, Diego; Bajo, Marco; Balbin, Rosa; Bozzano, Roberto; Nardelli, Bruno Buongiorno; Cardin, Vanessa; Casas, Benjamin; Charcos-llorens, Miguel; Chiggiato, Jacopo; Clementi, Emanuela; Coppini, Giovanni; Coppola, Laurent; Cossarini, Gianpiero; Deidun, Alan; Deudero, Salud; D'Ortenzio, Fabrizio; Drago, Aldo; Drudi, Massimiliano; El Serafy, Ghada; Escudier, Romain; Farcy, Patrick; Federico, Ivan; Fernández, Juan Gabriel; Ferrarin, Christian; Fossi, Cristina; Frangoulis, Constantin; Galgani, Francois; Gana, Slim; García Lafuente, Jesús; Sotillo, Marcos García; Garreau, Pierre; Gertman, Isaac; Gómez-pujol, Lluis; Grandi, Alessandro; Hayes, Daniel; Hernández-lasheras, Jaime; Herut, Barak; Heslop, Emma; Hilmi, Karim; Juza, Melanie; Kallos, George; Korres, Gerasimos; Lecci, Rita; Lazzari, Paolo; Lorente, Pablo; Liubartseva, Svitlana; Louanchi, Ferial; Malacic, Vlado; Mannarini, Gianandrea; March, David; Marullo, Salvatore; Mauri, Elena; Meszaros, Lorinc; Mourre, Baptiste; Mortier, Laurent; Muñoz-mas, Cristian; Novellino, Antonio; Obaton, Dominique; Orfila, Amine; Pascual, Ananda; Pensieri, Sara; Pérez Gómez, Begoña; Pérez Rubio, Susana; Perivoliotis, Leonidas; Petihakis, George; De La Villéon, Loic Petit; Pistoia, Jenny; Poulain, Pierre-marie; Pouliquen, Sylvie; Prieto, Laura; Raimbault, Patrick; Reglero, Patricia; Reyes, Emma; Rotllan, Paz; Ruiz, Simón; Ruiz, Javier; Ruiz, Inmaculada; Ruiz-orejón, Luis Francisco; Salihoglu, Baris; Salon, Stefano; Sammartino, Simone; Sánchez Arcilla, Agustín; Sánchez-román, Antonio; Sannino, Gianmaria; Santoleri, Rosalia; Sardá, Rafael; Schroeder, Katrin; Simoncelli, Simona; Sofianos, Sarantis; Sylaios, Georgios; Tanhua, Toste; Teruzzi, Anna; Testor, Pierre; Tezcan, Devrim; Torner, Marc; Trotta, Francesco; Umgiesser, Georg; Von Schuckmann, Karina; Verri, Giorgia; Vilibic, Ivica; Yucel, Mustafa; Zavatarelli, Marco; Zodiatis, George.
The Mediterranean community represented in this paper is the result of more than 30 years of EU and nationally funded coordination, which has led to key contributions in science concepts and operational initiatives. Together with the establishment of operational services, the community has coordinated with universities, research centers, research infrastructures and private companies to implement advanced multi-platform and integrated observing and forecasting systems that facilitate the advancement of operational services, scientific achievements and mission-oriented innovation. Thus, the community can respond to societal challenges and stakeholders needs, developing a variety of fit-for-purpose services such as the Copernicus Marine Service. The...
Tipo: Text
Palavras-chave: Observing and forecasting systems; Sustained observations; Ocean variability; FAIR data; Climate; Operational services; Science with and for society; SDG's.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62494/66808.pdf

ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements
Provedor de dados: 5
Autores: Leymarie, Edouard; Penkerc'H, Christophe; Vellucci, Vincenzo; Lerebourg, Christophe; Antoine, David; Boss, Emmanuel; Lewis, Marion R.; D'Ortenzio, Fabrizio; Claustre, Herve.
An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate their derived products. This requirement is especially needed during the early stages of an OCR satellite activity or for remote areas poorly covered by oceanographic cruises with possible bio-optical anomalies. Taking advantage of Argo's profiling float technology, we present a new autonomous profiling float dedicated to in situ radiometric measurements. The float is based on the Provor CTS5 (manufacturer NKE) with an added novel two protruding arm design allowing for sensor redundancies, shading mitigation and near-surface data. Equipped...
Tipo: Text
Palavras-chave: Autonomous profiling floats; Remote sensing reflectance; Ocean color; Validation; System vicarious calibration; Austral ocean; Mediterranean Sea; Radiometric measurement.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00585/69694/67579.pdf