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The tropopause ”transmits” the
ozone from the stratosphere to the troposphere. |
|
Ultraviolet part of the light induces
photochemical reactions of different substances, and forms ”photooxidants”
that contains mainly ozone. Other components of the ”photooxidants” are
hydrogen peroxide, hydroperoxide, peroxoacetyl nitrate and radicals. It
means, destruction of the stratospheric ozone layer on one side and increase
of the tropospheric ozone concentration on the other side are connected
mutually together. As a consequence of ozone layer destruction it comes
to the increased UV radiation resulting in more intensive photochemical
reaction and consequently the increase of ozone concentration in troposphere. |
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Ozone formation is considerably
enhanced by presence of hydrocarbons and oxides of nitrogen in the air.
We can say ozone is formed only with the help of the solar radiation. The
highest concentrations occur generally in the afternoon hours |
|
Ozone relatively lightly reacts
with other pollutants. For example, it oxidises NO to NO2. The
result is the fact that the ozone concentration in the highly polluted
region can be lowe then in the region polluted by Nox and VOC. |
