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Registros recuperados: 4
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Trawling-induced resuspension and dispersal of muddy sediments and dissolved elements in the Gulf of Lion (NW Mediterranean) ArchiMer
De Madron, X; Ferre, B; Le Corre, Gildas; Grenz, C; Conan, P; Pujo Pay, M; Buscail, R; Bodiot, O.
A dedicated trawling experiment was performed at three sites on the Gulf of Lion continental shelf, with the aim of assessing the resuspension of particulate and dissolved matter triggered by different types of trawls on muddy sediments. The different configurations were: (i) bottom trawl, with bobbin for ground rope (Rockhopper): (ii) bottom trawl, without bobbin (Medits); and (iii) pelagic trawl, towed at 1 and 10m above the seabed. The plumes of resuspended sediment were measured using the acoustic backscattered intensity, from a towed ADCP. Concomitant profiles of particle size-distribution, light transmission and water samples were collected, outside and inside the plumes. The analysis of the data enabled derivation of the major physical and...
Tipo: Text Palavras-chave: Northwestern Mediterranean Sea; Gulf of Lion; Suspended particulate matter; Sediment resuspension; Cohesive sediments; Bottom trawling; Coastal fisheries.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1355.pdf
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Variabilité hydrologique et biologique du golfe du Lion. I. Transports en azote et productivité potentielle ArchiMer
Conan, P; Pujo-pay, M; Raimbault, P; Leveau, M.
A monthly time-series of the seasonal evolution of the North Mediterranean Current (NMC) and of nitrogen flux across a transect (5 degrees 12'5 E between 43 degrees 10'N and 42 degrees 50'N) at the entrance of the Gulf of Lions was carried out over two years. The NMC exhibited two distinct structures: a winter structure (from November to May) characterised by strong mesoscale and interannual variations in which the current was 20 to 30 km width, about 400 m depth and velocity scaled between 5 and more than 40 cm s(-1); and a summer structure (from May to November) which was less sensitive to mesoscale variations but showing large interannual variability. The current was located more offshore, was wider and shallower than the one in winter and velocity...
Tipo: Text Palavras-chave: Hydrologie; Variabilité à méso-échelle; Azote; Flux de matière; Bilan; Hydrology; Mesoscale variability; Nitrogen; Flux; Budget.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43638/43249.pdf
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Variabilité hydrologique et biologique du golfe du Lion. II. Productivité sur le bord interne du courant ArchiMer
Conan, P; Pujo-pay, M; Raimbault, P; Leveau, M.
An estimation of the annual productivity in the Gulf of Lions has been made in the 0-100 m layer using a Let-Go system, with monthly measurements at a fixed station. A value of 140 to 150 g m(-2) a(-1) of C is found, of which around 75 % occurs in the upper 50 m. The seasonal production is described according to three distinct patterns during the two hydrological seasons: (1) variable production in winter; (2) surface bloom in late winter; (3) homogeneous and mean production in summer with a clear Deep Chlorophyll Maximum. The hydrological winter phase represented 60 % of total annual production. The seasonal duality of the hydrodynamic system and the mesoscale variations of the Northern Mediterranean Current account for the variability and the evolution...
Tipo: Text Palavras-chave: Production primaire; Bilan; Nitrate; Chlorophylle; Cycle saisonnier; Primary production; Budget; Nitrate; Chlorophyll; Seasonal cycle.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43639/43248.pdf
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Variability of the northern current off Marseilles, western Mediterranean-sea, from February to June 1992 ArchiMer
Conan, P; Millot, Claude.
A hydrological transect was performed on seven occasions from February to June 1992 in the coastal zone off Marseilles, a region of the western Mediterranean Sea where such data were not yet available. This lack of information is surprising, especially if one considers the large amount of data already collected both further seawards and in neighbouring regions such as the Ligurian and the Catalan Seas. The time interval between the transects (one week to one month) does not permit a distinction between mesoscale and seasonal variations, but the fine space interval between the casts (3-4 km) and the length of the transect (similar to 45 km) provide significant information on the characteristics of the Northern Current (NC) when it penetrates into the Gulf...
Tipo: Text
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00096/20771/18397.pdf
Registros recuperados: 4
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