Ozone depletion over Antarctica (1998). Coloured satellite map of atmospheric ozone in the southern hemisphere between mid-August and early October 1998. An ozone "hole" is seen over Antarctica. Depletion of ozone reached a record size of 10.5 million square miles on 19-09-98; ozone levels fell to 90 Dobson units on 30-09-98,one of the lowest recorded. Colour-coding in Dobson Units (DU): yellow to red (300-340 DU),green to blue (280-200 DU),dark blue (200-100 DU). The ozone hole is due to atmospheric pollution,reaching a maximum around October,the Antarctic spring. Data from the TOMS instrument aboard TOMS-EP satellite; and the SBUV instrument aboard NOAA-14 satellite | |
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Credit: | Science Photo Library / NASA |
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