Les Dinoflagellés - Ceratium gravidum

Carte bathymétrique mondiale

Underwater glider (Photo : David Luquet)

Mollusk (Photo : Fabien Lombard)

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The seasonal evolution of the chlorophyll a concentration as seen by a « water color » satellite (SeaWifs) in the Atlantic Ocean.

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)

Copepode Sapphirina iris (Photo : Fabien Lombard)

Jellyfish Pelagia noctiluca (Photo : Fabien Lombard)

Instrumented buoy (Photo : David Luquet)

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Underwater glider

Diatom species Odontella mobiliensis (Photo : Sophie Marro)

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Illustration in synthesized images of the seasons of the ocean: a year from the Arctic - Animation Clement Fontana

Siphonophores Forskalia formosa (Photo : Fabien Lombard)

Deployment of a profiling float (Photo : Jean-Jacques Pangrazi)

Radiolarians (Photo : Fabien Lombard)

Dinoflagellates Ceratium platycorne var platycorne (Photo : Sophie Marro)

Instrumented buoy (Photo : David Luquet)

Tunicata Pyrosoma (Photo : Fabien Lombard)

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)