|
The
ground layer or tropospheric ozone is created by photochemical
reactions initiated by the effect of solar ultraviolet radiation
on nitrogen oxides and carbohydrates hydrocarbons
emitted by combustion of fossil fuel.
Mean concentrations of
ozone in Latvia vary between 50 μg/m3 and 57
μg/m3. Many cases of ozone concentrations
exceeding the limit values for protection of vegetation are
recorded yearly.
Proportion of recorded
cases at Rucava of ground level ozone exceeding the limit
value for protection of vegetation
[Enlarge the picture] |
|
