Satellite map showing a severe depletion or "hole" in the ozone layer over Antarctica on October 2,1986 - the Antarctic spring. The hole is probably due to pollution of the atmosphere by chlorofluor- ocarbons used in aerosols & refrigerants. First seen in 1980,the hole has grown each year since. It reaches a maximum in mid-October. It is visible as the oval area at centre,coloured purple,black & grey. Antarctica is outlined in white. The colours stand for Dobson units,a measure of atmospheric ozone,as shown in the colour scale at right. The map was made by the Total Ozone Mapping Spectrometer (TOMS) on the American Nimbus-7 weather satellite | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NASA |
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