Accueil > Actualités > Séminaires > Séminaire de Peter Hitchcock au LMD-ENS


Titre : The dynamics of stratosphere-troposphere coupling
Nom du conférencier : Peter Hitchcock
Son affiliation : LMD
Laboratoire organisateur : IPSL
Date et heure : 08-02-2018 14h00
Lieu : LMD-ENS - 24 rue Lhomond - 75005 Paris - salle E314
Résumé :

Variability and trends in the circumpolar stratospheric jets that form in the winter hemisphere has been increasingly recognized as having a significant influence on the eddy driven jets within the troposphere below (and consequently on surface weather and climate). This has been observed in both hemispheres on various time scales, and contributes to uncertainty in projections of circulation changes in the coming century.
The downward influence of extratropical stratospheric variability is also robustly observed in model simulation, yet a clear dynamical understanding of this coupling remains elusive. I will discuss what is known about the dynamics of this coupling and what remains unclear, with an emphasis on the broader value of resolving these questions.

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