Peter L wrote:
> Hej!
> Jeg læste at ozonlagets tykkelse idag ligger på 333DU.
> Et andet sted læste jeg at hvis man dividerer Du talet med 100
> får man ozonlagets tykkelse i mm. Kan det virkelig passe at det ikke
> er tykkere end 3,33 mm?
The total quantity of ozone in the ozone layer is not very large; if
just the ozone were compressed to the pressure of the air at sea level,
it would be only a few millimeters thick.
>
> Og foresten hvordan er det nu ozonlaget bliver dannet? Er det ikke
> noget med o2 der omdannes?
Ozone in the earth's atmosphere is generally created by ultraviolet
light striking oxygen molecules containing two oxygen atoms (O2),
splitting them into individual oxygen atoms (atomic oxygen); the atomic
oxygen then combines with unbroken O2 to create ozone, O3. The ozone
molecule is also unstable and when ultraviolet light hits ozone it
splits into a molecule of O2 and an atom of atomic oxygen, a continuing
process called the ozone-oxygen cycle, thus creating an ozone layer in
the stratosphere
>
> Peter L
>
Håber engelsk er i orden. Kilde:
http://en.wikipedia.org/wiki/Ozone_layer
Martin.