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<p>The multi-annual partnership-based research programme SPIRAL (deep seismic and regional investigation in northern Algeria) aims to study the deep structure of the North Algerian margin using "high penetration" seismic methods: low frequency vertical reflection shooting, as well as wide angle reflection and refraction with deployment of listening stations on the seabed and onshore. The first strand of the SPIRAL programme SPIRAL involves the sea cruise to acquire geophysical data. This cruise took place aboard RV L'Atalante in two legs, respectively from 26/09 (Oran) to 10/10 2009 (Annaba) and from 13/10 (Annaba) to 10/11 2009 (Oran). These two legs provided acquisition of wide-angle seismic and penetrating multichannel seismic reflection data, which was the main objective of the project, as well as additional data like very high resolution (Chirp or sediment sounder type), magnetic and gravimetric, and multibeam bathymetric echosounder data. The profiles acquired during SPIRAL should supply elements to characterize the structural levels in and under the sediment cover (crust) down to the mantle in the targeted zones given in the cruise report; obtain accurate images of faulted and folded area and the major boundaries like the Moho; constrain the physical and rheological properties (particularly velocity models) which should help determine things like the nature of the crust at the continent-ocean transition. These constraints will make it possible to perform thermo-mechanical modelling on the scale of the Maghrebide belts to the base of the crust (temperature, density) and thus specify the main boundaries of the large crustal domains.</p>
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The objective of this project is the investigation of the structure and functioning of different CWC successional habitats (living, dead and buried corals), in order to understand the response of the CWC to a changing ocean. Therefore, we identified 4 specific objectives which will allow us to get insight in the distribution of these CWC habitats (objective 1), the responsible environmental drivers (objective 2), the associated (molecular and morphological) biodiversity (objective 3) and the connectivity between distinct CWC habitats at different spatial scales (objective 4). We will concentrate our study on the Bay of Biscay by providing multiple-scale analysis of habitat mapping, environmental characterisation, biodiversity patterns and processes of interconnectivity. However, comparisons will be made through European-US collaboration with other regions at both sides of the Atlantic in order to understand amphi- and trans-Atlantic distribution patterns and processes. This project is part of the 7th EC Framework Programme Hermione (Hotspot Ecosystem Research and Man's Impact On European Seas) (2011-2013).This monitoring project aims to execute a continuous research on the effects of the exploitation of non-living resources of the territorial sea and the continental shelf on the sedimentary movements and the marine environment (Law of 13 June 1969 on the exploration and exploitation of non-living resources of the territorial sea and the continental shelf). Belgian national research program.
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<p>MOOSE-GE aims at 1) ensuring the maintenance of offshore French Mediterranean moorings and 2) carrying out an annual mapping of hydrological, biogeochemical and biological characteristics of the whole north-western basin. The related project are MERMEX, HYMEX, MISTRALS and MOOSE.</p>
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The BATEL-1 cruise was conducted from 4 to 14 June 2007 by the University of Bordeaux-1 (EPOC laboratory). The main objective was to obtain a database of optical and geochemical data in order to create algorithms to quantify the suspended particles and dissolved substances for the interpretation of MODIS, SPOT, ASTER and FORMOSAT-2 satellite images. The end purpose is to identify coastal water composition from satellite images. The second aim was to monitor the Adour river's turbidity plume during this period. In addition, measurements were taken to analyze the heavy metals, stratification of water masses (CTD) and for intercomparison of two fluorimeters. These measurements are currently being used by Ms. Petus (Thesis, Cifre grant). The cruise fell under the interregional Aquitaine-Euskadi programme.
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-Validation of surface salinity measurements using drifting buoys. Three models of drifting buoys (17 buoys in all) were deployed in the Bay of Biscay on 2 April (R/V Thalassa trip) and on 2-3 May (COSMOS1 aboard Côtes de la Manche). This involved passing close to the buoys, taking samples, TSG measurements and CTD hauls to validate the data. Two sections taken by CTD probe in front structure eddy (for the CONGAS programme). Retrieval of a prototype PROVOR-CTS3 float deployed in May by the Côte d'Aquitaine vessel. 9 CTD sensors to be attached to elephant seals were tested (mounted on SBE25 CTD during profiles). This falls under the COSMOS project, headed by J. Boutin and G. Reverdin.
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Studying the role played by formation of deep water in the chemical composition and budgets of matter in the Mediterranean. Understanding the relationships between the way plankton food webs are organized and the hydrodynamic structures. The related project is MISTRALS - MerMEX.
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Acoustic measurements.
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<p>The deep basin and continental shelf of the Gulf of Lion (North Western Mediterranean) are known for the formation of dense water in wintertime by the action of N-NW continental winds. This dense water is formed both offshore and at the coast. The area of Cap de Creus and its adjacent canyon is the main zone where dense coastal water is exported. Dense water dynamics on the continental shelf are also influenced by E-SE storms. Transfers of organic, inorganic, particulate and dissolved matter from the surface to the deep basin and from the shelf towards the slope by these physical processes can influence the redistribution of chemical elements in sediments, as well as the structure and functioning of benthic and pelagic ecosystems. The CASCADE cruise aimed to determine the characteristics of these two physical mechanisms and their numerous impacts, as well as monitoring changes in the hydrology, dynamics, sedimentology and biogeochemistry of water bodies. We propose a qualitative and quantitative estimate of particulate and dissolved, organic and inorganic matter fluxes exported towards the slope and the deep basin by these mechanisms.</p>
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Characterizing the variability of hydrological and current features and particulate fluxes on the continental rise of the Gulf of Lion and in the deep convection zone. Monitoring of deep benthic communities in the western canyons and on the continental rise of the Gulf of Lion.
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Assessment of small pelagic species resources in the Gulf of Lion using echo-integration and trawl hauls to identify the observed echoes. This falls under the SIDEPECHE project.