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)
Les mésocosmes déployés dans la rade de Villefranche (© L. Maugendre, LOV)
Krill (Photo : Fabien Lombard)
Instrumented buoy (Photo : Emilie Diamond)
Deployment of a profiling float (Photo : Jean-Jacques Pangrazi)
Préparation des mésocosmes sur le ponton du laboratoire d'Océanographie de Villefranche lors de l'expérience menée en rade de Villefranche en février 2013 (© L. Maugendre, LOV)
Acantharia (Photo : Fabien Lombard)
Instrumented buoy (Photo : Emilie Diamond)
Deployment of a profiling float (Photo : Jean-Jacques Pangrazi)
Velella - Planktonic Vessels
Colonies of polyps transported by prevailing winds, velella drift at the surface of warm seas.
Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.
Dinoflagellate Ceratium arietinum var arietinum (Photo : Sophie Marro)
Foraminifera (Photo : Fabien Lombard)
Dinoflagellés Ceratium massiliense var protuberans (Photo : Sophie Marro)
Seasonal evolution of the chlorophyll a concentration as obtained by the ocean color sensor SeaWiFS in the Atlantic Ocean.
