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animation:seminaires:2017:accueil [2017/03/10 09:12] – [STRUCTURE, CHEMICAL ORDER AND REACTIVITY OF GOLD-PALLADIUM NANOPARTICLES: FROM VACUUM TO REACTION CONDITIONS] cicalugaanimation:seminaires:2017:accueil [2017/05/09 12:28] (Version actuelle) cicaluga
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 ====== Séminaires/Colloquium 2017 ====== ====== Séminaires/Colloquium 2017 ======
 +
 +===== Dynamics of eddy-driven jets and macroturbulent scales in the atmosphere =====
 +{{:cbp_ens.jpeg?nolink&200 |}}**15 mai 2017 de 11h00 à 12h00** \\
 +COLLOQUIUM Centre Blaise Pascal-Laboratoire de Physique \\
 +Grande salle du CBP (LR6 C 023), ENS Lyon, France \\
 +
 +**Yohai KASPI  **, Weizmann Institute
 + \\
 +
 +Organisateurs : \\ 
 +
 +  * Antoine Venaille (Laboratoire de Physique, ENS de Lyon) \\
 +  * Cerasela Calugaru (Centre Blaise Pascal, ENS de Lyon, France) \\
 +   
 +
 +**Abstract :** \\ 
 +We study the dynamics of eddy-driven jets using a high-resolution idealized atmospheric general circulation model (GCM), where we systematically vary Earth’s rotation rate, and thus allow a clear separation between the subtropical and eddy-driven jets. We find that due to asymmetries in baroclinicity across the jet, eddy-driven jets tend to migrate poleward. Furthermore, the migrating jets allow a latitude-by-latitude analysis of the macroturbulent scales controlling the jets. We find that over a wide range of eddy scales and latitudes the jet width scales with the Rhines scale. This is analyzed through partitioning of the barotropic energy spectrum to the role of eddy-mean and eddy-eddy interactions, in transferring energy up- and down-scale. We find that this can explain the observed energy spectrum in the atmosphere. Finally, the role of eddy-eddy interactions is analyzed through comparison to simulations where they are omitted.
 +
  
 ===== Computational photochemistry of complex molecular systems ===== ===== Computational photochemistry of complex molecular systems =====
animation/seminaires/2017/accueil.1489137135.txt.gz · Dernière modification : (modification externe)