Accueil > Actualités > Séminaires > Seminaire de Dave Raymond au LMD


Titre : Environmental Forcing of Convection over Tropical Oceans
Nom du conférencier : Dave Raymond
Son affiliation : Physics Department and Climate and Water Consortium, New Mexico Tech, Socorro
Laboratoire organisateur : LMD
Date et heure : 25-09-2018 10h30
Lieu : Campus de Jussieu, salle de réunion du LMD, T45-55, 3e étage
Résumé :

The forcing of convection by its environment is a topic of great importance for global weather and climate models. Many tropical phenomena such as the Madden-Julian oscillation and various tropical wave modes are highly sensitive to the treatment of convection. Using observational, theoretical, and modeling tools, we have developed a framework for the thermodynamic aspects of this forcing. The thermodynamic predictive variables are the sur-
face moist entropy flux, the saturation fraction, and a measure of low to middle level moist convective instability. This scheme works well in regions of near-uniform sea surface temperature. However, strong SST gradients are likely to require a fourth variable, deep convective inhibition. The upcoming OTREC (organization of tropical east Pacific convection) project should yield insight into the strong SST gradient case.

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