Rosette used to collect seawater samples during a scientific cruise in the South Pacific Ocean. Duringthe austral summer,the amount of chlorophyllais so low thatthe water becomesdeepblue,almostpurple. (Photo : Joséphine Ras)
Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.
Underwater glider (Photo : David Luquet)
Deployment of a profiling float (Photo : Jean-JacquesPangrazi)
Surface chlorophyll a concentration in the Mediterranean Sea.