UMR CNRS 5805 EPOC
Environnements et Paléoenvironnements
Océaniques et Continentaux

        

Consignes de Sécurité et Numéros d'Urgence
(à l'usage des personnels du laboratoire)

le 09-01-2014 à 14:00

Lieu Salle Stendhal, DGO, Bâtiment B18 Intervenant(s) Nathaelle BOUTTES, Research scientist, NCAS-Climate, University of Reading, UK

During the Last deglaciation, the climate evolved from the relatively cold state of the Last Glacial Maximum (around 21 kyrs ago) characterized by large northern hemisphere ice sheets, to the warmer Holocene with only the Greenland ice sheet remaining in the North Hemisphere.
Simultaneously, the carbon cycle experienced large changes. The atmospheric CO2 increased while the vertical gradient of Atlantic d13C became less negative and the atmospheric D14C decreased. The ocean is a likely candidate to explain the evolution of the carbon cycle as it stores a large amount of carbon. We will show how coupled carbon-climate models can be developed and used to test the impact of changes in the oceanic circulation driven by the formation of very saline water in the Southern Ocean.