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| Guerin, Thomas; Bertin, Xavier; Dodet, Guillaume. |
| Over the last decade, modelling systems based on unstructured grids have been appearing increasingly attractive to investigate the dynamics of coastal zones. However, the resolution of the sediment continuity equation to simulate bed evolution is a complex problem which often leads to the development of numerical oscillations. To overcome this problem, addition of artificial diffusion or bathymetric filters are commonly employed methods, although these techniques can potentially over-smooth the bathymetry. This study aims to present a numerical scheme based on the Weighted Essentially Non-Oscillatory (WENO) formalism to solve the bed continuity equation on unstructured grids in a finite volume formulation. The new solution is compared against a classical... |
| Tipo: Text |
Palavras-chave: Morphodynamic modelling; Unstructured grid; WENO; Diffusion; Coastal environments; Exner equation. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00606/71851/70480.gif |
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| Bertin, Xavier; De Bakker, Anouk; Van Dongeren, Ap; Coco, Giovanni; Andre, Gael; Ardhuin, Fabrice; Bonneton, Philippe; Bouchette, Frederic; Castelle, Bruno; Crawford, Wayne C.; Davidson, Mark; Deen, Martha; Dodet, Guillaume; Guerin, Thomas; Inch, Kris; Leckler, Fabien; Mccall, Robert; Muller, Heloise; Olabarrieta, Maitane; Roelvink, Dano; Ruessink, Gerben; Sous, Damien; Stutzmann, Eleonore; Tissier, Marion. |
| Infragravity (hereafter IG) waves are surface ocean waves with frequencies below those of wind-generated "short waves" (typically be- low 0.04 Hz). Here we focus on the most common type of IG waves, those induced by the presence of groups in incident short waves. Three related mechanisms explain their generation: (1) the development, shoaling and release of waves bound to the short-wave group envelopes (2) the modulation by these envelopes of the location where short waves break, and (3) the merging of bores (breaking wave front, resembling to a hydraulic jump) inside the surfzone. When reaching shallow water (O(1-10 m)), IG waves can transfer part of their energy back to higher frequencies, a process which is highly dependent on beach slope. On gently... |
| Tipo: Text |
Palavras-chave: Infragravity waves; Bound wave; Dissipation; Reflection; Sediment transport; Barrier breaching; Seiche; Earth hum. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00417/52876/53800.pdf |
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| Garcia-bueno, Nuria; Dumay, Justine; Guerin, Thomas; Turpin, Vincent; Paillard, Christine; Stiger-pouvreau, Valerie; Pouchus, Yves-francois; Aitor Marin-atucha, Arnaldo; Decottignies, Priscilla; Fleurence, Joel. |
| The wide polarity range and highly polar compounds of two selected red seaweed, Grateloupia turuturu and Palmaria palmata were extracted using two different types of solvent, dichloromethane/methanol and methanol/water. Monthly in vitro antibacterial activities were studied using the microplate method against the marine bacteria Vibrio harveyi strain ORM4, known to infect abalone. Inhibition, slowdown and delay of Vibrio harveyi growth were investigated. Polar compounds of seaweed showed an activity against the abalone pathogen. The best activity was recorded from P. palmata collected in spring, with an inhibition of 7.9% of the bacterial growth. Preliminary 1H NMR profiles identified the differences between the extracts. |
| Tipo: Text |
Palavras-chave: Antibacterial activity; Abalone disease; Haliotis tuberculata; Red seaweed; Vibrio harveyi. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00617/72875/71929.pdf |
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| Alberti, Adriana; Poulain, Julie; Engelen, Stefan; Labadie, Karine; Romac, Sarah; Ferrera, Isabel; Albini, Guillaume; Aury, Jean-marc; Belser, Caroline; Bertrand, Alexis; Cruaud, Corinne; Da Silva, Corinne; Dossat, Carole; Gavory, Frederick; Gas, Shahinaz; Guy, Julie; Haquelle, Maud; Jacoby, E'Krame; Jaillon, Olivier; Lemainque, Arnaud; Pelletier, Eric; Samson, Gaelle; Wessner, Mark; Acinas, Silvia G.; Royo-llonch, Marta; Cornejo-castillo, Francisco M.; Logares, Ramiro; Fernandez-gomez, Beatriz; Bowler, Chris; Cochrane, Guy; Amid, Clara; Ten Hoopen, Petra; De Vargas, Colomban; Grimsley, Nigel; Desgranges, Elodie; Kandels-lewis, Stefanie; Ogata, Hiroyuki; Poulton, Nicole; Sieracki, Michael E.; Stepanauskas, Ramunas; Sullivan, Matthew B.; Brum, Jennifer R.; Duhaime, Melissa B.; Poulos, Bonnie T.; Hurwitz, Bonnie L.; Pesant, Stephane; Karsenti, Eric; Wincker, Patrick; Bork, Peer; Boss, Emmanuel; Follows, Michael; Gorsky, Gabriel; Hingamp, Pascal; Iudicone, Daniele; Karp-boss, Lee; Not, Fabrice; Raes, Jeroen; Sardet, Christian; Speich, Sabrina; Stemmann, Lars; Sunagawa, Shinichi; Bazire, Pascal; Beluche, Odette; Besnard-gonnet, Marielle; Bordelais, Isabelle; Boutard, Magali; Dubois, Maria; Dumont, Corinne; Ettedgui, Evelyne; Fernandez, Patricia; Garcia, Esperance; Aiach, Nathalie Giordanenco; Guerin, Thomas; Hamon, Chadia; Brun, Elodie; Lebled, Sandrine; Lenoble, Patricia; Louesse, Claudine; Mahieu, Eric; Mairey, Barbara; Martins, Nathalie; Megret, Catherine; Milani, Claire; Muanga, Jacqueline; Orvain, Celine; Payen, Emilie; Perroud, Peggy; Petit, Emmanuelle; Robert, Dominique; Ronsin, Murielle; Vacherie, Benoit. |
| A unique collection of oceanic samples was gathered by the Tara Oceans expeditions (2009-2013), targeting plankton organisms ranging from viruses to metazoans, and providing rich environmental context measurements. Thanks to recent advances in the field of genomics, extensive sequencing has been performed for a deep genomic analysis of this huge collection of samples. A strategy based on different approaches, such as metabarcoding, metagenomics, single-cell genomics and metatranscriptomics, has been chosen for analysis of size-fractionated plankton communities. Here, we provide detailed procedures applied for genomic data generation, from nucleic acids extraction to sequence production, and we describe registries of genomics datasets available at the... |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00600/71256/69634.pdf |
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