Consulta: creatorFacets:"Podeur, Christian"
Registros recuperados: 5
Data/hora: 01/06/2024 10:14:21

Contribution au développement et à l'amélioration des techniques d'échantillonnage passif (DGT et POCIS) : développment et amélioration techniques EP : II-B-01 (16). Rapport final
Provedor de dados: 5
Autores: Gonzalez, Jean-louis; Munaron, Dominique; Podeur, Christian; Tapie, Nathalie; Budzinski, Helene; Marusczak, Nicolas; Montero, Natalia; Belzunce-segarra, Maria Jesus.
This project is a contribution to the improvement and development of passive sampling techniques. The objectives are: - to develop ways to limit the fouling formation on the samplers requiring prolonged immersion time (POCIS) and ensure a "constant" and reproducible sampling rate - test and validate the DGT developed specifically for Hg wich is a "WFD priority" metal.   Key words (thematic and geographical area) :Passive samplers, POCIS, DGT, fouling, sampling rate, Hg, baie du Lazaret , étang de Thau
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00115/22628/20353.pdf

Advances in measuring ocean salinity with an optical sensor
Provedor de dados: 5
Autores: Le Menn, Marc; De La Tocnaye, J. L. De Bougrenet; Grosso, P.; Delauney, Laurent; Podeur, Christian; Brault, P.; Guillerme, O.
Absolute salinity measurement of seawater has become a key issue in thermodynamic models of the oceans. One of the most direct ways is to measure the seawater refractive index which is related to density and can therefore be related to the absolute salinity. Recent advances in high resolution position sensitive devices enable us to take advantage of small beam deviation measurements using refractometers. This paper assesses the advantages of such technology with respect to the current state-of-the-art technology. In particular, we present the resolution dependence on refractive index variations and derive the limits of such a solution for designing seawater sensors well suited for coastal and deep-sea applications. Particular attention has been paid to...
Tipo: Text
Palavras-chave: Refractive index; Seawater; Density; Salinity; Refractometer.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00052/16295/13899.pdf

Développement et essais d’un salinomètre optique pour l’océanographie
Provedor de dados: 5
Autores: Le Menn, Monique; Malardé, Damien; David, Arnaud; Brault, Patrice; Grosso, Philippe; De Bougrenet De La Tocnaye, Jean-louis; Le Reste, Serge; Podeur, Christian.
Salinity is the essential parameter for ocean dynamics studies. Its definition and using in the equations used to calculate the thermodynamic properties of seawater, were revised in 2010, opening the possibility of new sensors developments. In this context, NOSS (NKE Optical Salinity Sensor) has emerged as one of the first underwater instrument for in situ refractive index measurement in the past years open up the scope of possibilities to access to density parameter. This achievement is the fruit of the cooperation between several institutions and the fruit of several years of developments and trials. NOSS sensor is designed to be deployed in coastal environment and open-ocean waters up to 2000m, especially on profiling floats of the Argo network.
Tipo: Text
Palavras-chave: Salinity; Density; Ocean; Seawater; Refractive index; Sensor.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00664/77601/79616.pdf

Multidisciplinary investigation on cold seeps with vigorous gas emissions in the Sea of Marmara (MarsiteCruise): Strategy for site detection and sampling and first scientific outcome
Provedor de dados: 5
Autores: Ruffine, Livio; Ondreas, Helene; Blanc-valleron, Marie-madeleine; Teichert, Barbara M. A.; Scalabrin, Carla; Rinnert, Emmanuel; Birot, Dominique; Croguennec, Claire; Ponzevera, Emmanuel; Pierre, Catherine; Donval, Jean-pierre; Alix, Anne-sophie; Germain, Yoan; Bignon, Laurent; Etoubleau, Joel; Caprais, Jean-claude; Knoery, Joel; Lesongeur, Francoise; Thomas, Bastien; Roubi, Angelique; Legoix, Ludovic Nicolas; Burnard, Pete; Chevalier, Nicolas; Lu, Hailong; Dupre, Stephanie; Fontanier, Christophe; Dissard, Delphine; Olgun, Nazli; Yang, Hailin; Strauss, Harald; Ozaksoy, Volkan; Perchoc, Jonathan; Podeur, Christian; Tarditi, Corinne; Ozbeki, Eyyup; Guyader, Vivien; Marty, Bernard; Madre, David G; Pitel-roudaut, Mathilde; Grall, Celine; Embriaco, Davide; Polonia, Mina; Gasperini, Lucas; Cagatay, M. Namik; Henry, Pierre; Geli, Louis.
MarsiteCruise was undertaken in October/November 2014 in the Sea of Marmara to gain detailed insight into the fate of fluids migrating within the sedimentary column and partially released into the water column. The overall objective of the project was to achieve a more global understanding of cold-seep dynamics in the context of a major active strike-slip fault. Five remotely operated vehicle (ROV) dives were performed at selected areas along the North Anatolian Fault and inherited faults. To efficiently detect, select and sample the gas seeps, we applied an original procedure. It combines sequentially (1) the acquisition of ship-borne multibeam acoustic data from the water column prior to each dive to detect gas emission sites and to design the tracks of...
Tipo: Text
Palavras-chave: Acoustic survey; Authigenic carbonates; Biogeochemistry; Chemical analyses; Cold seeps; Dissolved major elements; Fluid seepage; Geology; In situ Raman analysis; Methane; ROV dives.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00433/54434/55783.pdf

La Bouée MOLIT : un nouveau concept de bouée instrumentée
Provedor de dados: 5
Autores: Quemener, Loic; Repecaud, Michel; Jegou, Paul; Aoustin, Yannick; Retho, Michael; Barbot, Stephane; Gautier, Laurent; Podeur, Christian; Pichavant, Pascal.
La validité du concept de station de mesure haute-fréquence Marel a été vérifié par le déploiement d’un réseau constitué de stations de type axisymétrique (Réseau Baie de Seine, Bouée Iroise en rade de Brest). Le mouillage et le comportement de ces bouées en terme d’accessibilité et de maintenance est un handicap pour l’extension vers les zones plus exposées du large. La bouée MOLIT (Mer Ouverte LITtorale) constitue une réponse technique et financière.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00628/73990/73327.pdf