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Period: to
Ozone Depletion
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Chlorofluorocarbons discovered
Due to the large scale production of CFCs for refridgerators reduces ozone -
G.M.B. Dobson began measuring ozone
Using baloons with instrumentation -
CFCs discovered in the ozone layer
CFCs detected in ozone layer -
Low ozone over Antartica
In 1981 scientists discovered an alarming low ozone layer over Antarctica measured at 160 DUs -
Antarctic Ozone rechecked
The scientists reset their instrumentation and showed once again low ozone layers in Antarctica -
CFCs discovered over Antarctica
CFCs at an all time high shown to deplete the ozone layer -
Ozone Checked again
THe ozone was checked again and showed a very low amout of ozone and showed at the south pole a level 125 DUs which is in fact half of what it is recomended at 300Dus