/in-situ observations/Sea cruises
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The acoustic tomography approach provides an indirect measure of the temperature of an ocean volume. The technique provides an integrated measure of temperature along the sound propagation paths. The variety of paths between a transmitter and a receiver, as well as the large number of instruments deliver information on the variability of the thermal content of the insonified volume.
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Raw seismic reflexion data collected on board of the French oceanographic fleet managed by IFREMER and archived at SISMER.
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The ORHAGO cruises (Observation of the benthic aquatic resources of the GOlfe de Gascogne) are part of Ifremer's mission of observation and expertise in support of fisheries management. Their main aim is to obtain series of abundance indices for flatfish and in particular for sole. Consequently, the choice was made to adopt a beam trawl to comply with the standards of the International Council for the Exploration of the Sea (ICES) for flatfish. This choice has made it possible to be part of the campaigns coordinated by ICES and thus to be a member of a community in which the methodology and results can be discussed each year in the ICES WGBEAM working groups. Since 2013, the ORHAGO campaigns have been used to assess the state of the Bay of Biscay sole stock. They allow this assessment to be carried out analytically, i.e. using a model to analyse and simulate the dynamics of the stock. The ORHAGO campaigns are also a source of information on the evolution of benthic populations and coastal benthic habitats in the Bay of Biscay.
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The dataset includes age- and length-based catch per unit effort data for commercial fish species collected by the French trawl survey EVHOE.
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Occurrence data for marine mammals, birds and other marine megafauna collected by Megascope on fishing and oceanographic surveys (date, position, species).
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The NourDem project aims to carry out annual trawling cruises in the three estuaries of the Seine, the Loire and the Gironde.