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- Title
Baroclinic Instability in the Eady Model: Interpretations.
- Authors
Egger, Joseph
- Abstract
The mechanism of baroclinic instability in the Eady model is interpreted by explicitly calculating the ageostrophic circulations related to the model’s hyperbolic basic functions. It is advantageous to perform the analysis at the midlevel where the model’s “barotropic” mode provides the streamfunction and the “baroclinic” mode represents the temperature. These modes interact and instability occurs if the horizontal advection of background potential temperature by the barotropic mode dominates over the vertical one because of the same mode at the midlevel. A rather simple picture of the stable as well as the unstable flow configurations emerges. Other interpretations are discussed briefly.
- Subjects
BAROCLINICITY; METEOROLOGY; EARTH sciences; ENVIRONMENTAL sciences; PHYSICAL sciences
- Publication
Journal of the Atmospheric Sciences, 2009, Vol 66, Issue 6, p1856
- ISSN
0022-4928
- Publication type
Article
- DOI
10.1175/2008JAS3014.1