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)
The research vessel "Marion Dufresne"
Ctenaria Eucharis multicornis (Photo : Fabien Lombard)
Mollusk (Photo : Fabien Lombard)
Instrumented buoy (Photo : Emilie Diamond)
Ciliate (Photo : Fabien Lombard)
Foraminifera (Photo : Fabien Lombard)
Jellyfish Pelagia noctiluca (Photo : Fabien Lombard)
Satellite observation (GEOS-12) of Hurricane Katrina in August 2005 in the Gulf of Mexico - Source : NASA-NOAA
Instrumented buoy (Photo : David Luquet)
Coccolithophore (Photo : Sophie Marro)
Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro)
Diatom genus Hemiaulus (Photo : Sophie Marro)
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)
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)
Dinoflagellate Ceratium extensum (Photo : Sophie Marro)
Tunicata Pyrosoma (Photo : Fabien Lombard)
This video describes how to perform the Ludion experiment and explains the physical processes involved.