Catalogo dei prodotti della ricerca
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishThe atmospheric general circulation is characterized by both single- and double-jet patterns. The double-jet structure of the zonal mean zonal wind is analyzed in Southern Hemisphere observations for the two calendar months of November and April. The observed features are studied further in an idealized quasi-geostrophic and a simplified general circulation model (GCM). Results suggest that capturing the bimodality of the zonal mean flow requires the parameterization of momentum and heat fluxes associated with baroclinic instability of the three-dimensional fields. The role of eddy heat fluxes in generating the observed double-jet pattern is ascertained by using an analytical Eady model with stratospheric easterlies, in which a single wave disturbance interacts with the mean flow. In this model, the dual jets are generated by the zonal mean flow correction. Sensitivity of the results to the tropospheric vertical wind shear (or, equivalently, the meridional temperature gradient in the basic state's troposphere) is also studied in the Eady model and compared to related experiments using the simplified GCM.
Zonal Flow Regime Changes in a GCM and in a Simple Quasigeostrophic Model: The Role of Stratospheric Dynamics / Bordi, Isabella; Klaus, Fraedrich; Michael, Ghil; Sutera, Alfonso. - In: JOURNAL OF THE ATMOSPHERIC SCIENCES. - ISSN 0022-4928. - STAMPA. - 66:5(2009), pp. 1366-1383. [10.1175/2008jas2771.1]
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Zonal Flow Regime Changes in a GCM and in a Simple Quasigeostrophic Model: The Role of Stratospheric Dynamics | |
| Autori: | ||
| Data di pubblicazione: | 2009 | |
| Rivista: | ||
| Citazione: | Zonal Flow Regime Changes in a GCM and in a Simple Quasigeostrophic Model: The Role of Stratospheric Dynamics / Bordi, Isabella; Klaus, Fraedrich; Michael, Ghil; Sutera, Alfonso. - In: JOURNAL OF THE ATMOSPHERIC SCIENCES. - ISSN 0022-4928. - STAMPA. - 66:5(2009), pp. 1366-1383. [10.1175/2008jas2771.1] | |
| Handle: | http://hdl.handle.net/11573/573 | |
| Appartiene alla tipologia: | 01a Articolo in rivista |
File allegati a questo prodotto
http://hdl.handle.net/11573/573
Copyright © 2022