Figure 6: Timeseries of the de-trended spring
(MAM) ozone variability (12) and
the AO winter index (JFM). The
correlation coefficient is indicated for each region.
Because of the
long lifetime of ozone in winter and early spring, it is necessary
to
use the winter (JFM) AO index. Analysis with (JFMAM) AO index is
almost identical.