Séminaires du
Département d'Astrophysique, Géophysique et Océanographie

Jeudi 30 novembre, 15h45

Salle A4
Petits Amphithéâtres - Galerie des Arts
Quartier Agora, Allée du 6 Août, 15, B-4000 Liège 1 (Sart-Tilman)

The intimate relationship between ocean and sea ice in the Southern Hemisphere

Olivier Lecomte
(Université Catholique de Louvain)

Owing in particular to contrasting geographical situations (Arctic sea ice surrounded by continents, Antarctic sea ice surrounding Antarctica) and much larger ocean sea ice heat fluxes in the Southern Ocean, the processes governing the seasonal, interannual and multidecadal variability of sea ice are very different from one hemisphere to the other. After a brief contextual setting of Antarctic sea ice with respect to what is known by most about the recent decay of Arctic sea ice, the presentation will give an overview of the processing driving the evolution of Antarctic sea ice. The talk will then cover the various existing hypotheses behind the changes in Antarctic sea ice cover over the last decades, with a focus on ice ocean interactions, and in a twofold modelling and observational perspective.