A year from the Arctic

Dinoflagellate Ceratium falcatum (Photo : Sophie Marro)

Posters

Coccolithophore (Photo : Sophie Marro)

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

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)

Dinoflagellates Ceratium platycorne var platycorne (Photo : Sophie Marro)

Ptéropode : Ce petit escargot de mer (le ptéropode Limacina helicina) joue un rôle important dans la chaîne alimentaire et le fonctionnement de l'écosystème marin Arctique. Sa coquille calcaire constitue une protection vitale. Or, une étude montre que cet escargot construit sa coquille à une vitesse 30 % plus faible lorsqu'il est maintenu dans une eau de mer ayant les caractéristiques chimiques attendues pour la fin du siècle.© S. Comeau, LOV

Jellyfish Aequorea aequorea (Photo : Fabien Lombard)

Instrumented buoy (Photo : David Luquet)

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Diatoms - Life in glass houses
Champions of photosynthesis, these unicellular organisms appeared at the time of dinosaurs.They produce a quarter of the oxygen we breathe.

Ctenaria Eucharis multicornis (Photo : Fabien Lombard)

Instrumented buoy (Photo : David Luquet)

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Animation of the biosphere obtained from the ocean color sensor SeaWiFS

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The profiling float

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Embryos and larvae
Drifting in the currents, embryos and larvae perpetuate the species and are food for multitudes.

Satellite observation (GEOS-12) of Hurricane Katrina in August 2005 in the Gulf of Mexico - Source : NASA-NOAA

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)

Copepode Sapphirina iris (Photo : Fabien Lombard)