Ptéropodes - Mollusques qui nagent Les papillons des mers construisent de fragiles coquilles. Résisteront-elles à l’acidification des océans?
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)
Seasonal evolution of the chlorophyll a concentration as obtained by the ocean color sensor SeaWiFS in the Atlantic Ocean.
Instrumented buoy (Photo : Emilie Diamond)
Phytoplankton bloom observed by the ocean color sensor MODIS onboard NASA satellite Terra in May 2010. The bloom spreads broadly in the North Atlantic from Iceland to the Bay of Biscay - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)
Deployment of a profiling float (Photo : Jean-JacquesPangrazi)
Dinoflagellate Ceratium candelabrum var depressum (Photo : Sophie Marro)
The variouscomponents of aprofiling floattypePROVOR
Phytoplankton bloom observed in the Barents Sea (North of Norway) in August 2010 by the ocean color sensor MODIS onboard NASA satellite Aqua. Changes in ocean color result from modifications in the phytoplankton composition and concentration. The green colors are likely associated with the presence of diatoms. The shades of light blue result from the occurrence of coccolithophores, phytoplankton organisms that strongly reflect light due to their chalky shells - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)
Dinoflagellate Ceratium arietinum var arietinum (Photo : Sophie Marro)
