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Abrupt warming and salinification of intermediate waters interplays with decline of deep convection in the Northwestern Mediterranean Sea 5
Margirier, Félix; Testor, Pierre; Heslop, Emma; Mallil, Katia; Bosse, Anthony; Houpert, Loïc; Mortier, Laurent; Bouin, Marie-noëlle; Coppola, Laurent; D’ortenzio, Fabrizio; Durrieu De Madron, Xavier; Mourre, Baptiste; Prieur, Louis; Raimbault, Patrick; Taillandier, Vincent.
The Mediterranean Sea is a hotspot for climate change, and recent studies have reported its intense warming and salinification. In this study, we use an outstanding dataset relying mostly on glider endurance lines but also on other platforms to track these trends in the northwestern Mediterranean where deep convection occurs. Thanks to a high spatial coverage and a high temporal resolution over the period 2007–2017, we observed the warming (+0.06 ∘C year−1) and salinification (+0.012 year−1) of Levantine Intermediate Water (LIW) in the Ligurian Sea. These rates are similar to those reported closer to its formation area in the Eastern Mediterranean Sea. Further downstream, in the Gulf of Lion, the intermediate heat and salt content were exported to the deep...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00663/77507/79256.pdf
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Autonomously profiling the nitrate concentrations in the ocean : the Pronuts project 5
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
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Challenges for Sustained Observing and Forecasting Systems in the Mediterranean Sea 5
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
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Characterizing, modelling and understanding the climate variability of the deep water formation in the North-Western Mediterranean Sea 5
Somot, Samuel; Houpert, Loic; Sevault, Florence; Testor, Pierre; Bosse, Anthony; Taupier-letage, Isabelle; Bouin, Marie-noelle; Waldman, Robin; Cassou, Christophe; Sanchez-gomez, Emilia; Durrieu De Madron, Xavier; Adloff, Fanny; Nabat, Pierre; Herrmann, Marine.
Observing, modelling and understanding the climate-scale variability of the deep water formation (DWF) in the North-Western Mediterranean Sea remains today very challenging. In this study, we first characterize the interannual variability of this phenomenon by a thorough reanalysis of observations in order to establish reference time series. These quantitative indicators include 31 observed years for the yearly maximum mixed layer depth over the period 1980–2013 and a detailed multi-indicator description of the period 2007–2013. Then a 1980–2013 hindcast simulation is performed with a fully-coupled regional climate system model including the high-resolution representation of the regional atmosphere, ocean, land-surface and rivers. The simulation reproduces...
Tipo: Text Palavras-chave: Deep water formation; Open-sea deep convection; Interannual variability; Mediterranean Sea; Regional climate models; Climate trends.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00348/45948/45654.pdf
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Community-Level Responses to Iron Availability in Open Ocean Planktonic Ecosystems 5
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...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00475/58680/61184.pdf
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CORIOLIS. Rapport d’activités 2016 5
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
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00388/49970/50562.pdf
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Deep-Sea Bioluminescence Blooms after Dense Water Formation at the Ocean Surface 5
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...
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Ano: 2013 URL: https://archimer.ifremer.fr/doc/00241/35256/33831.pdf
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EGO : towards a global glider infrastructure for the benefit of marine research and operational oceanography 5
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.
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Ano: 2012 URL: https://archimer.ifremer.fr/doc/00114/22554/20242.pdf
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Estimating dense water volume and its evolution for the year 2012-2013 in the Northwestern Mediterranean Sea: An observing system simulation experiment approach 5
Waldman, Robin; Somot, Samuel; Herrmann, Marine; Testor, Pierre; Estournel, Claude; Sevault, Florence; Prieur, Louis; Mortier, Laurent; Coppola, Laurent; Taillandier, Vincent; Conan, Pascal; Dausse, Denis.
The Northwestern Mediterranean (NWMed) Sea includes one of the best observed ocean deep convection sites in the World. An observing system simulation experiment (OSSE) is developed to provide a methodology for estimating observing network errors. It is applied to quantify dense water volumes in the NWMed during 2012–2013 with their observation error from MOOSE network. Results from the OSSE show low spatiotemporal sampling errors, which confirms MOOSE network ability to measure dense waters. However, results are highly sensitive to instrumental stability. The dense water volume is then estimated in observations from four ship cruises between summers 2012 and 2013. A large seasonal cycle is found, maximal in spring 2013 and dominated by the area west of...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00350/46080/46025.pdf
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Evolution of an oceanic anticyclone in the lee of Madeira Island: In situ and remote sensing survey 5
Caldeira, Rui M. A.; Stegner, Alexandre; Couvelard, Xavier; Araujo, Isabel B.; Testor, Pierre; Lorenzo, Alvaro.
Island wakes are areas of a strong eddy activity influencing the availability and transport of organic matter in the ocean which, in turn impact biological productivity. Despite this, eddy formation in the lee of North Atlantic tropical islands is scarcely documented, except for the Canary Islands. Moreover, the occurrence of anticyclones leeward of Madeira has seldom been detected. During the summer of 2011, a multiplatform approach, combining satellite data with in situ measurements, was used to study an anticyclonic eddy generated in the lee of the Madeira Island. The main objective was to confirm recent numerical evidence suggesting that orographically perturbed winds can induce anticyclonic eddies leeward of Madeira, particularly during summer months....
Tipo: Text Palavras-chave: Boundary-layer; Inertial instability; Mode water; Mixed layer; Intrathermocline eddies; Wake.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00197/30846/29209.pdf
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Evolving and Sustaining Ocean Best Practices and Standards for the Next Decade 5
Pearlman, Jay; Bushnell, Mark; Coppola, Laurent; Karstensen, Johannes; Buttigieg, Pier Luigi; Pearlman, Francoise; Simpsons, Pauline; Barbier, Michele; Muller-karger, Frank E.; Munoz-mas, Cristian; Pissierssens, Peter; Chandler, Cyndy; Hermes, Juliet; Heslop, Emma; Jenkyns, Reyna; Achterberg, Eric P.; Bensi, Manuel; Bittig, Henry C.; Blandin, Jerome; Bosch, Julie; Bourles, Bernard; Bozzano, Roberto; Buck, Justin J. H.; Burger, Eugene F.; Cano, Daniel; Cardin, Vanessa; Llorens, Miguel Charcos; Cianca, Andres; Chen, Hua; Cusack, Caroline; Delory, Eric; Garello, Rene; Giovanetti, Gabriele; Harscoat, Valerie; Hartman, Susan; Heitsenrether, Robert; Jirka, Simon; Lara-lopez, Ana; Lanteri, Nadine; Leadbetter, Adam; Manzella, Giuseppe; Maso, Joan; Mccurdy, Andrea; Moussat, Eric; Ntoumas, Manolis; Pensieri, Sara; Petihakis, George; Pinardi, Nadia; Pouliquen, Sylvie; Przeslawski, Rachel; Roden, Nicholas P.; Silke, Joe; Tamburri, Mario N.; Tang, Hairong; Tanhua, Toste; Telszewski, Maciej; Testor, Pierre; Thomas, Julie; Waldmann, Christoph; Whoriskey, Fred.
The oceans play a key role in global issues such as climate change, food security, and human health. Given their vast dimensions and internal complexity, efficient monitoring and predicting of the planet's ocean must be a collaborative effort of both regional and global scale. A first and foremost requirement for such collaborative ocean observing is the need to follow well-defined and reproducible methods across activities: from strategies for structuring observing systems, sensor deployment and usage, and the generation of data and information products, to ethical and governance aspects when executing ocean observing. To meet the urgent, planet-wide challenges we face, methods across all aspects of ocean observing should be broadly adopted by the ocean...
Tipo: Text Palavras-chave: Best practices; Sustainability; Interoperability; Digital repository; Peer review; Ocean observing; Ontologies; Methodologies.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00503/61423/65111.pdf
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Glider-Based Active Acoustic Monitoring of Currents and Turbidity in the Coastal Zone 5
Gentil, Mathieu; Many, Gaël; Durrieu De Madron, Xavier; Cauchy, Pierre; Pairaud, Ivane; Testor, Pierre; Verney, Romaric; Bourrin, François.
The recent integration of Acoustic Doppler Current Profilers (ADCPs) onto underwater gliders changes the way current and sediment dynamics in the coastal zone can be monitored. Their endurance and ability to measure in all weather conditions increases the probability of capturing sporadic meteorological events, such as storms and floods, which are key elements of sediment dynamics. We used a Slocum glider equipped with a CTD (Conductivity, Temperature, Depth), an optical payload, and an RDI 600 kHz phased array ADCP. Two deployments were carried out during two contrasting periods of the year in the Rhone River region of freshwater influence (ROFI). Coastal absolute currents were reconstructed using the shear method and bottom tracking measurements, and...
Tipo: Text Palavras-chave: Glider; Optics; Acoustics; Satellite; Coastal hydrodynamics; Suspended particulate matter; Particulate fluxes; Gulf of Lions; Mediterranean.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00648/76039/76962.pdf
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HyMeX-SOP2: The Field Campaign Dedicated to Dense Water Formation in the Northwestern Mediterranean 5
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...
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Ano: 2016 URL: https://archimer.ifremer.fr/doc/00386/49688/50224.pdf
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Impact of open-ocean convection on particle fluxes and sediment dynamics in the deep margin of the Gulf of Lions 5
Stabholz, M.; Durrieu De Madron, X.; Canals, M.; Khripounoff, Alexis; Taupier-letage, Isabelle; Testor, Pierre; Heussner, S.; Kerherve, P.; Delsaut, N.; Houpert, Loic; Lastras, G.; Dennielou, Bernard.
The deep outer margin of the Gulf of Lions and the adjacent basin, in the western Mediterranean Sea, are regularly impacted by open-ocean convection, a major hydrodynamic event responsible for the ventilation of the deep water in the western Mediterranean Basin. However, the impact of open-ocean convection on the flux and transport of particulate matter remains poorly understood. The variability of water mass properties (i.e., temperature and salinity), currents, and particle fluxes were monitored between September 2007 and April 2009 at five instrumented mooring lines deployed between 2050 and 2350-m depth in the deepest continental margin and adjacent basin. Four of the lines followed a NW-SE transect, while the fifth one was located on a sediment wave...
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23654/21571.pdf
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JERICO. Report on best practices in conductiong operations and maintaining 5
Petihakis, George; Sorensen, Kai; Hernandez, Carlos; Testor, Pierre; Ntoumas, Manolis; Petersen, Wilhelm; Mader, Julien; Mortier, Laurent.
The seas and oceans are an intrinsic part of the earth and climate systems. They cover 70% of our planet, provide 95% by volume of its biosphere, support more than 50% of global primary production and harbour an enormous diversity of life adapted to extremely broad-ranging environmental conditions. The oceans are a driver of our climate but are also affected by climate change and ocean acidification. They are under increasing pressure from human activities and pollution, and growing coastal populations. The combination of natural and human-induced changes taking place in our seas and oceans including, for example, rising temperatures, the melting of Arctic sea ice, ocean acidification, increasingly extreme weather events, transfer of non-indigenous marine...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00386/49741/50263.pdf
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Modeling the intense 2012-2013 dense water formation event in the northwestern Mediterranean Sea: Evaluation with an ensemble simulation approach 5
Waldman, Robin; Somot, Samuel; Herrmann, Marine; Bosse, Anthony; Caniaux, Guy; Estournel, Claude; Houpert, Loic; Prieur, Louis; Sevault, Florence; Testor, Pierre.
The northwestern Mediterranean Sea is a well-observed ocean deep convection site. Winter 2012-2013 was an intense and intensely documented dense water formation (DWF) event. We evaluate this DWF event in an ensemble configuration of the regional ocean model NEMOMED12. We then assess for the first time the impact of ocean intrinsic variability on DWF with a novel perturbed initial state ensemble method. Finally, we identify the main physical mechanisms driving water mass transformations. NEMOMED12 reproduces accurately the deep convection chronology between late January and March, its location off the Gulf of Lions although with a southward shift and its magnitude. It fails to reproduce the Western Mediterranean Deep Waters salinification and warming,...
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Ano: 2017 URL: https://archimer.ifremer.fr/doc/00363/47379/47365.pdf
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Moose: An integrated multi-sites observatory system in the NW Mediterranean sea 5
Mantoura, F; Coppola, Laurent; Cousin, M.; Antoine, David; Beguery, Laurent; Blain, Stephane; Bouin, Marie-noelle; Cadiou, Jean-francois; Durrieu De Madron, Xavier; Forget, Philippe; Fraunie, Philippe; Gojak, Carl; Gorsky, Gaby; Goyet, Catherine; Lebaron, Philippe; Lellouche, Jean-michel; Ludwig, Hubert; Molcard, Anne; Mortier, Laurent; Petit De La Villeon, Loic; Petrenko, Anne; Piazzola, J.; Queguiner, B.; Raimbault, Patrick; Rigaud, Vincent; Sempere, Richard; Tamburini, Jean-simon; Testor, Pierre; Vuillemin, Renaud; Zakardjian, B..
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Ano: 2009 URL: http://archimer.ifremer.fr/doc/00122/23341/21166.pdf
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Multiscale Observations of Deep Convection in the Northwestern Mediterranean Sea During Winter 2012-2013 Using Multiple Platforms 5
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
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Observations of Irminger Sea Anticyclonic Eddies 5
Fan, Xue; Send, Uwe; Testor, Pierre; Karstensen, Johannes; Lherminier, Pascale.
Mesoscale anticyclonic eddies in the Irminger Sea are observed using a mooring and a glider. Between 2002 and 2009, the mooring observed 53 anticyclones. Using a kinematic model, objective estimates of eddy length scales and velocity structure are made for 16 eddies. Anticyclones had a mean core diameter of 12 km, and their mean peak observed azimuthal speed was 0.1 m s(-1). They had core salinities and potential temperatures of 34.91-34.98 and 4.488-5.34 degrees C, respectively, making them warm and salty features. These properties represent a typical salinity anomaly of 0.03 and a temperature anomaly of 0.28 degrees C from noneddy values. All eddies had small (<< 1) Rossby numbers. In 2006, the glider observed two anticyclones having diameters of...
Tipo: Text Palavras-chave: North Atlantic Ocean; Eddies; Mesoscale processes.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00137/24832/22921.pdf
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Observing mixed layer depth, nitrate and chlorophyll concentrations in the northwestern Mediterranean: A combined satellite and NO 3 profiling floats experiment 5
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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