Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.
Dinoflagellate Ceratium gravidum (Photo : Sophie Marro)
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)
Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro)
Dinoflagellate Ceratium furca (Photo : Sophie Marro)
