Global distribution of minor constituents observed by SMILES and its dynamical background
During this period, the observed ozone distribution in the tropical stratosphere shows two maxima in latitude. It corresponds to the meridional circulation related to the shear phase of the quasi-biennial oscillation (QBO). Other minor species such as HCl also shows effect of the meridional circulation.
In winter polar region, on the other hand, the distribution of constituents shows influence of a major stratospheric sudden warming. As the polar vortex has been distorted, depletion of ozone and increase of species such as ClO have been observed.