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| Park, Young-hyang; Durand, Isabelle; Kestenare, Elodie; Rougier, Gilles; Zhou, Meng; D'Ovidio, Francesco; Cotte, Cedric; Lee, Jae-hak. |
| The circulation of iron-rich shelf waters around the Kerguelen Islands plays a crucial role for a climatically important, annually recurrent phytoplankton spring bloom over the sluggish shelf region and its downstream plume area along the Antarctic circumpolar flow. However, there is a long-standing confusion about the Polar Front (PF) in the Kerguelen region due to diverse suggestions in the literature for its geographical location with an extreme difference over 10° of latitude. Based on abundant historical hydrographic data, the in situ hydrographic and current measurements during the 2011 KEOPS2 cruise, satellite chlorophyll images, and altimetry-derived surface velocity fields, we determine and validate an up-to-date location of the PF around the... |
| Tipo: Text |
Palavras-chave: Polar Front; Kerguelen; Southern Ocean. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00244/35485/33995.pdf |
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| Doglioli, Andrea; Nencioli, Francesco; Petrenko, Anne; Rougier, Gilles; Fuda, Jean-luc; Grima, Nicolas. |
| The Lagrangian Transport Experiment (LATEX) was developed to study the influence of coupled physical and biogeochemical dynamics at the meso- and submesoscales on the transfers of matter and heat between the coastal zone and the open ocean. One of the goals of the Latex10 field experiment, conducted during September 2010 in the Gulf of Lion (northwest Mediterranean), was to mark a dynamical mesoscale feature by releasing a passive tracer [sulfur hexafluoride (SF6)] together with an array of Lagrangian buoys. The goal was to release the tracer in an initial patch as homogeneous as possible in the horizontal, and to study its turbulent mixing and dispersion while minimizing the contribution due to advection. For that, it was necessary to continuously adjust... |
| Tipo: Text |
Palavras-chave: Dispersion; Lagrangian circulation; Transport; Ship observations; Tracers; Experimental design; Software. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00155/26590/24719.pdf |
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| Wagener, Thibaut; Metzl, Nicolas; Caffin, Mathieu; Fin, Jonathan; Helias Nunige, Sandra; Lefevre, Dominique; Lo Monaco, Claire; Rougier, Gilles; Moutin, Thierry. |
| The western tropical South Pacific was sampled along a longitudinal 4000 km transect (OUTPACE cruise, 18 Feb., 3 Apr. 2015) for measurement of carbonates parameters (total alkalinity and total inorganic carbon) between the Melanesian Archipelago (MA) and the western part of the South Pacific gyre (WGY). This manuscript reports this new dataset and derived properties: pH on the total scale (pHT) and the CaCO3 saturation state with respect to calcite (Ωcal) and aragonite (Ωara). We also estimate anthropogenic carbon (CANT) distribution in the water column using the TrOCA method (Tracer combining Oxygen, inorganic Carbon and total Alkalinity). Along the OUTPACE transect, CANT inventories of 37–43 mol m−2 were estimated with higher CANT inventories in MA... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00439/55075/56505.pdf |
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| Marrec, Pierre; Gregori, Gerald; Doglioli, Andrea M.; Dugenne, Mathilde; Della Penna, Alice; Bhairy, Nagib; Cariou, Thierry; Nunige, Sandra Helias; Lahbib, Soumaya; Rougier, Gilles; Wagener, Thibaut; Thyssen, Melilotus. |
| Fine-scale physical structures and ocean dynamics strongly influence and regulate biogeochemical and ecological processes. These processes are particularly challenging to describe and understand because of their ephemeral nature. The OSCAHR (Observing Submesoscale Coupling At High Resolution) campaign has been conducted in fall 2015 in which, a fine-scale structure in the North Western Mediterranean Ligurian subbasin was pre-identified using both satellite and numerical modeling data. Along the ship track, various variables were measured at the surface (temperature, salinity, chlorophyll-a and nutrients concentrations) with ADCP current velocity. We also deployed a new model of CytoSense automated flow cytometer (AFCM) optimized for small and dim cells,... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00398/50970/51726.pdf |
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| Bouruet-aubertot, Pascale; Cuypers, Yannis; Doglioli, Andrea; Caffin, Mathieu; Yohia, Christophe; De Verneil, Alain; Petrenko, Anne; Lefèvre, Dominique; Le Goff, Hervé; Rougier, Gilles; Picheral, Marc; Moutin, Thierry. |
| Microstructure measurements were performed along the OUTPACE longitudinal transect in the tropical Pacific (Moutin and Bonnet, 2015). Small-scale dynamics and three-dimensional turbulence in the first 800m surface layer were characterized based on hydrographic and current measurements at fine scale and turbulence measurements at cm scale using a vertical microstructure profiler. The possible impact of turbulence on biogeochemical budgets in the surface layer was also addressed in this region of increasing oligotrophy to the East. The dissipation rate of turbulent kinetic energy, ε, showed an interesting contrast along the longitudinal transect with higher turbulence level in the West, i.e. the Melanesian Archipelago, compared to the East, within the South... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00448/56009/57518.pdf |
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| Schroeder, K.; Millot, C.; Bengara, L.; Ben Ismail, Sana; Bensi, Manuel; Borghini, M.; Budillon, G.; Cardin, Vanessa; Coppola, Laurent; Curtil, Colin; Drago, Aldo; El Moumni, B.; Font, J.; Fuda, Jean-luc; Garcia-lafuente, J.; Gasparini, G. P.; Kontoyiannis, H.; Lefevre, D.; Puig, P.; Raimbault, Patrick; Rougier, Gilles; Salat, J.; Sammari, Cherif; Sanchez Garrido, J. C.; Sanchez-roman, A.; Sparnocchia, Stefania; Tamburini, C.; Taupier-letage, Isabelle; Theocharis, A.; Vargas-yanez, M.; Vetrano, Anna. |
| The long-term monitoring of basic hydrological parameters (temperature and salinity), collected as time series with adequate temporal resolution (i.e. with a sampling interval allowing the resolution of all important timescales) in key places of the Mediterranean Sea (straits and channels, zones of dense water formation, deep parts of the basins), constitute a priority in the context of global changes. This led CIESM (The Mediterranean Science Commission) to support, since 2002, the HYDROCHANGES programme (www.ciesm.org/marine/programs/hydrochanges.htm), a network of autonomous conductivity, temperature, and depth (CTD) sensors, deployed on mainly short and easily manageable subsurface moorings, within the core of a certain water mass. The HYDROCHANGES... |
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| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00217/32783/31246.pdf |
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