Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1605
AuthorsLonghetto, A.* 
Briatore, L.* 
Chabert d'Hieres, G.* 
Didelle, H.* 
Ferrero, E.* 
Giraud, C.* 
TitlePhysical modelling of baroclinic development in the lee of the Alps
Issue DateOct-1997
Series/Report no.40/5
URIhttp://hdl.handle.net/2122/1605
Keywordsbaroclinic intability
orographic cyclogenesis
laboratory modelling
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.99. General or miscellaneous 
AbstractWhen baroclinic development is triggered by an obstacle, like an extended mountain range, the so-called lee, or secondary cyclogenesis can develop. The presence of the obstacle exerts a blocking effect on the lower layers of the impinging airflow, forcing them to go round its borders and reach the lee region with a delay. Blocking and delay are both responsible for the initial pressure decrease downwind of the mountain and for the subsequent proper downstream baroclinic development. According to this rather simple scheme, a cyclogenesis episode in the lee of the Alps was simulated in a hydraulic turntable. The results of these experiments showed a good agreement, both from a qualitative and quantitative point of view, with the analysis of an episode of lee cyclogenesis coupled to a cold outbreak in the Mediterranean, which actually occured in Southern Europe downstream of the Alps.
Appears in Collections:Annals of Geophysics

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