Seasonal evolution of the chlorophyll a concentration as obtained by the ocean color sensor SeaWiFS in the Atlantic Ocean.
Les Dinoflagellés - Ceratium hexacanthum
chaîne de Ceratium hexacanthum qui restent les uns à la suites des autres au fur et à mesure des divisions.
Le mouvement des flagelles est bien visible.
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)
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)
Pleurobrachia
Propulsées par huit rangées de peignes, les groseilles de mer déploient deux longs tentacules pour pêcher des crustacés.
Copepode Sapphirina iris (Photo : Fabien Lombard)
Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.
Villefranche-sur-Mer in stormy weather, winter 2011 - Photo : J.-M. Grisoni
Foraminifera (Photo : Fabien Lombard)
The various components of a profiling float type PROVOR
Instrumented buoy (Photo : David Luquet)
This video describes how to perform the Ludion experiment and explains the physical processes involved.
Gelatinous plankton Mneniopsis (Photo : Fabien Lombard)
Ciliate (Photo : Fabien Lombard)
Pelagia - Fearsome Jellyfish
Mauve jellies move in droves, their nasty stings feared by swimmers.
Jellyfish Aequorea aequorea (Photo : Fabien Lombard)
Diatom genus Rhizosolenia (Photo : Sophie Marro)
