Abstract
The mechanism of the ozone transport by planetary waves in the winter stratosphere is considered on the basis of a quasi-one-dimensional model, developed by Hartmann and Garcia (1979), where meridional distribution of physical quantities are expressed by two modes. In the present study we consider wave-mean flow interactions as well as dynamical and photochemical effects on the variation in ozone content.
It is found that the meridional and vertical transports of ozone due to waves depend on the vertical structures in their orientation and magnitude. Our finding regarding the characteristics of ozone transport in wavenumber 1 is different from that reported by Hartmann and Garcia in the sense that southward transport dominates in the upper stratosphere above 30km height. This discrepancy is due to the difference in the vertical wave structures, because it is found that upward propagating waves bring about southward transport of ozone while internally trapped waves (nearly no phase change with height) bring about northward transport in the upper stratosphere. The results below 30km that northward and downward transports dominate are nearly in agreement with Hartman and Garcia. Similar characteristics are confirmed also in the results for wavenumber 2. Detailed discussions on the dependency of ozone transport on the vertical wave structure are made in terms of amplitudes and phases of wave.
The transport characteristics in this paper are well consistent with the recent observational analysis of ozone transport due to large-scale eddies reported by Gille et al. (1980).
Variations in the meridional distribution of mean ozone is studied. It is found that net poleward transport takes place more effectively by the waves with internally trapped structures than by those with propagating structures.
