Accueil > Actualités > Séminaires > Séminaire de Joan ALEXANDER


Titre : Atmospheric gravity wave effects on general circulation and climate and results from satellite observations
Nom du conférencier : Joan Alexander
Son affiliation : Colorado Research Associates (CORA), Boulder, Colorado
Laboratoire organisateur : LMD
Date et heure : 13-01-2011 14h30
Lieu : Salle E314, LMD, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris
Résumé :

Recent research has illuminated the importance of a well-resolved stratosphere in climate prediction models, particularly for prediction of future regional, seasonal, and interannual changes. Planetary-scale waves are the principal drivers of the stratospheric circulation and effects on climate, but smaller-scale gravity waves that are unresolved or poorly resolved in most climate models play important supporting roles.

Recently, some satellite observations with sufficiently high resolution have been used to quantify the important properties of gravity waves for understanding their role in driving the circulation. The talk will first explain the way gravity waves can influence climate in models, and then describe current results from satellite measurements of gravity waves and some of the challenges that remain in addressing these issues in future climate simulations.

Contact :

Riwal Plougonven, LMD-ENS, 24 rue Lhomond, 75005 Paris

01 44 32 27 31