- Variations in sunlight intensity
cause variations in O3 production
- When the sun is most intense
(i.e., Summer), O3 should reach
highest levels, and primary pollutants should be
at low concentrations.
- In the winter, when the sun is
weak, there will be reduced production of O3.
- Primary pollutants, such as CO,
reach seasonal maxima during the winter, but more
from the lower mixing heights during this season
than from the reduced sunlight intensity.
- The effect of low mixing heights
would be to reduce the dispersion volume in which
pollutants can mix, which increases the
concentration if the source rate is the same.