Consulta: creatorFacets:"Martin, J."
Registros recuperados: 5
Data/hora: 01/06/2024 11:11:24

Effects of storm events on the shelf-to-basin sediment transport in the southwestern end of the Gulf of Lions (Northwestern Mediterranean)
Provedor de dados: 5
Autores: Palanques, A.; Puig, P.; Guillen, J.; Durrieu De Madron, X.; Latasa, M.; Scharek, R.; Martin, J.
Shelf-to-basin sediment transport during storms was studied at the southwestern end of the Gulf of Lions from November 2003 to March 2004. Waves, near-bottom currents, temperature and sediment fluxes were measured on the inner shelf at 28-m depth, in the Cap de Creus submarine canyon head at 300-m depth and in the northwestern Mediterranean basin at 2350-m depth. This paper is a synthesis of results published separately in different papers; it includes some new data and focusses on the subject of storms. It is the first paper in which simultaneous data about the effect of storms on the shelf, the slope and in the basin are shown together. During the winter studied, there were two severe E-SE storms with significant wave heights &gt;= 7 m: one in December...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00289/39977/38562.pdf

Numerical modeling of bottom trawling-induced sediment transport and accumulation in La Fonera submarine canyon, northwestern Mediterranean Sea
Provedor de dados: 5
Autores: Payo-payo, Marta; Silva Jacinto, Ricardo; Lastras, G.; Rabineau, Marina; Puig, P.; Martin, J.; Canals, M.; Sultan, Nabil.
Bottom trawling leads to recurrent sediment resuspension events over fishing grounds. Recent studies have shown how bottom trawling can drive seascape reshaping at large spatial scales and enhance sediment transport in submarine canyons, which subsequently impacts deep-sea ecosystems. Present knowledge on the transfer and accumulation of sediment flows triggered by bottom trawling is based on localized and infrequent measurements whilst a more complete picture of the process is needed. The present work focuses on the modeling of sediment transport and accumulation resulting from trawling activities in La Fonera submarine canyon, northwestern Mediterranean Sea, thus contributing to an improved assessment of trawling impacts. Based on mooring data within a...
Tipo: Text
Palavras-chave: Bottom trawling; Inverse model; Modeling; Sediment transport; Submarine canyon; Turbidity currents.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00374/48549/48862.pdf

The impact of Saharan dust on the particulate export in the water column of the North Western Mediterranean Sea
Provedor de dados: 5
Autores: Ternon, E.; Guieu, C.; Loye-pilot, M. -d.; Leblond, N.; Bosc, E.; Gasser, B.; Miquel, J. -c.; Martin, J.
Simultaneous measurements of atmospheric deposition and of sinking particles at 200 and 1000 m depth, were performed in the Ligurian Sea (North-Western Mediterranean) between 2003 and 2007, along with phytoplanktonic activity derived from satellite images. Atmospheric deposition of Saharan dust particles was very irregular and confirmed the importance of sporadic high magnitude events over the annual average (11.4 g m(-2) yr(-1) for the 4 years). The average marine total mass flux was 31 g m(-2) yr(-1), the larger fraction being the lithogenic one (similar to 37%). The marine total mass flux displayed a seasonal pattern with a maximum in winter, occurring before the onset of the spring bloom. The highest POC fluxes did not occur during the spring bloom nor...
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00309/42028/41326.pdf

Shallow subsurface morphotectonics of the NW Sumatra subduction system using an integrated seismic imaging technique
Provedor de dados: 5
Autores: Ghosal, Dibakar; Singh, S. C.; Martin, J.
In subduction zones, shallow subsurface structures are the manifestation of the plate interactions at depth. However, significant water depths, rough bathymetry and presence of heavily deformed accretionary wedge materials hamper imaging of the near-surface features to a great extent using conventional imaging techniques. In this study, we show results using an integrated processing technique to a multichannel seismic data set acquired in 2006 from the northwestern offshore Sumatra. We start with first downward continuing the 12-km-long surface streamer data to the seafloor, followed by a high-resolution traveltime tomography of refracted phases to determine a detailed velocity-depth model of subsurface, which in turns, is used for pre-stack depth...
Tipo: Text
Palavras-chave: Controlled source seismology; Seismic tomography; Subduction zone processes; Continental margins: convergent; Folds and folding.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00290/40094/39185.pdf

Sediment transport along the Cap de Creus Canyon flank during a mild, wet winter
Provedor de dados: 5
Autores: Martin, J.; De Madron, X. Durrieu; Puig, P.; Bourrin, F.; Palanques, A.; Houpert, Loic; Higueras, M.; Sanchez-vidal, A.; Calafat, A. M.; Canals, M.; Heussner, S.; Delsaut, N.; Sotin, C.
Cap de Creus Canyon (CCC) is known as a preferential conduit for particulate matter leaving the Gulf of Lion continental shelf towards the slope and the deep basin, particularly in winter when storms and dense shelf water cascading coalesce to enhance the seaward export of shelf waters.  During the CASCADE (CAscading, Storm, Convection, Advection and Downwelling Events) cruise in March 2011, deployments of recording instruments within the canyon and vertical profiling of the water column properties were conducted to study with high spatial-temporal resolution the impact of such processes on particulate matter fluxes.  In the context of a mild and wet 2010–2011 winter, no remarkable dense shelf water formation was observed. On the other hand, the...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00129/24024/21981.pdf