WKBJ Approximation of the Stability of a Frontal Mean State

Petros Ioannou Kiphisia, Greece

Search for other papers by Petros Ioannou in
Current site
Google Scholar
PubMed
Close
and
Richard S. Lindzen Center for Meteorology and Physical Oceanography, Massachusetts Institute of Technology, Cambridge, Massachusetts

Search for other papers by Richard S. Lindzen in
Current site
Google Scholar
PubMed
Close
Restricted access

Abstract

The baroclinic instability of a frontal mean state is investigated using the WKBJ approximation. The results are compared with numerical calculations performed on the same mean state. Excellent agreement (within 5%) is found for jets whose half-width is as small as a Rossby radius of deformation. For jets 20% broader, the agreement is almost perfect.

Abstract

The baroclinic instability of a frontal mean state is investigated using the WKBJ approximation. The results are compared with numerical calculations performed on the same mean state. Excellent agreement (within 5%) is found for jets whose half-width is as small as a Rossby radius of deformation. For jets 20% broader, the agreement is almost perfect.

Save