Université de Bordeaux
LabEx COTECluster of Excellence
Cluster of excellence

Séminaire EPOC : Stefano PIERINI (Universite de Naples "Parthenope")

le 13/02 à 10h45

L'UMR EPOC propose un séminaire jeudi 13 février à 10h45 en salle Stendhal. Stefano Pierini présentera un exposé intitulé : "Intrinsic variability paced by external forcing in climate dynamics : a relevant oceanic example".

Dernière mise à jour jeudi 06 février 2014

In this seminar the problem of the internal changes of the climate system paced by external forcings is discussed in general, and analyzed in detail for a relevant oceanic example: the synchronization between the Kuroshio Extension (KE) decadal bimodal variability and the North Pacific Oscillation (NPO). Concepts playing an important role in the phenomenon, such as relaxation oscillators, deterministic and stochastic tipping points and coherence resonance are first outlined in the framework of dynamical systems theory. Modeling results concerning the KE bimodality based on both primitive equations and a low-order system are then presented, supporting the hypothesis of an intrinsic origin of such variability. Recent modeling results explaining the observed synchronization between the NPO and the KE bimodality are finally presented.

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