Quizz the ocean seasons

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

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Seasonal evolution of the chlorophyll a concentration as obtained by the ocean color sensor SeaWiFS in the Atlantic Ocean.

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

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The profiling float

Instrumented buoy (Photo : David Luquet)

Dinoflagellate Ceratium falcatum (Photo : Sophie Marro)

Carte de la camapagne du navire oceanographique James COOK

Le trajet du bateau sur fond couleur de la mer.

Mollusk (Photo : Fabien Lombard)

Rosette used to collect seawater samples during a scientific cruise in the South Pacific Ocean. During the austral summer, the amount of chlorophyll a is so low that the water becomes deep blue, almost purple. (Photo : Joséphine Ras)

Underwater glider (Photo : David Luquet)

Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.

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

Les mésocosmes déployés dans la rade de Villefranche (© L. Maugendre, LOV)

Appendicularia Oikopleura dioica (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)

Crab Zoea larva (Photo : Fabien Lombard)

Dinoflagellate Ceratium arietinum var arietinum (Photo : Sophie Marro)

Dinoflagellate Ceratium paradoxides (Photo : Sophie Marro)

Dinoflagellate Ceratium furca (Photo : Sophie Marro)