Most of the ozone is produced above the equator, where the amount of incident solar
UV light is maximal. Ozone formed at these latitudes then diffuses to the poles, where it
is ‘accumulated’. The effective thickness of the ozone layer may increase from ≤0.3 [cm]
at the equator to ≥0.4 [cm] above the pole at the end of winter. The ozone concentration
displays significant daily and seasonal fluctuations and tends to be highest in late winter
and early spring.
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