Comment on "Global QBO in Circulation and Ozone. Part I: Reexamination
The interannual fluctuations of total column ozone as revealed in the
measurements from the Nimbus 7 TOMS instrument are examined. The
time section of the zonal-mean ozone amounts reveals the familiar
oscillation (QBO) at low latitudes which is associated with a
complicated signal in
the subtropics and midlatitudes. In particular there seems to be
meridional phase propagation of the QBO signal which is rather
cycle to cycle. When the field is resolved into components symmetric and
antisymmetric between the hemispheres, the picture is greatly
symmetric component has a node near 15-degree latitude through almost the
record, while the antisymmetric component has little phase propagation.
dominant period for the antisymmetric component is equal to that
an annual cycle modulation of the quasi-biennial symmetric component.