The effect of zonally asymmetric radiation perturbations in the stratosphere on the coupling of atmospheric layers
Abstract
The boreal decadal changes of zonally asymmetric total ozone during the 60ies 70ies 80ies and 90ies of the last century showed a high variability From a sensitivity study with different ozone distributions of the lower stratosphere in the frame of the general circulation model ECHAM4 we know that a positive feedback process appeared which increased locally the radiative forcing of ozone by a factor of about ten linked with a strong influence on the dynamics and the coupling of the stratosphere and troposphere In this paper we report on a study with the GCM MAECHAM5 to examine the effect of radiation perturbations induced by zonally varying ozone in the whole stratosphere on the dynamics of the stratosphere and related coupling with the troposphere Especially the results reveal a shift in the polar vortex which induce changes in the distribution of the process of Rossby wave breaking As a further implication the jet induced generation of inertia gravity waves will be discussed
- Publication:
-
36th COSPAR Scientific Assembly
- Pub Date:
- 2006
- Bibcode:
- 2006cosp...36.1628P