Dinoflagellate Ceratium azoricum (Photo : Sophie Marro)

Diatom genus Coscinodiscus (Photo : Sophie Marro)

Scientists collecting seawater samples from the rosette (Photo : Stacy Knapp, Woods Hole Oceanographic Institution)

Coccolithophore  (Photo : Sophie Marro)

Dinoflagellate Ceratium candelabrum var depressum (Photo : Sophie Marro)

Average chlorophyll concentration in the surface ocean (from mi-September 1997 to August 2007) from the ocean color sensor SeaWiFS (NASA). Subtropical gyres, in the center of the oceanic basins, are characterized by very low concentrations of chlorophyll a (dark blue) - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)

Large rosette sampler used in the "World Ocean Circulation Experiment". This rosette has 36 10-liter Niskin bottles, an acoustic pinger (lower left), an "LADCP" current profiler (yellow long tube at the center), a CTD (horizontal instrument at the bottom), and transmissometer (yellow short tube at the center). (Photo : L. Talley)

Instrumented buoy (Photo : David Luquet)

Carte bathymétrique de la Mer Méditerranée

Underwater glider (Photo : David Luquet)

Dinoflagellate Ceratium tripos (Photo : Sophie Marro)

Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro)

Dinoflagellate Ceratium ranipes grd mains (Photo : Sophie Marro)

Ctenaria Eucharis multicornis  (Photo : Fabien Lombard)

Instrumented buoy (Photo : Emilie Diamond)

Instrumented buoy (Photo : David Luquet)