Satellite map showing a severe depletion or "hole" in the ozone layer over Antarctica on October 5th,1989. The hole is probably due to pollution of the atmosphere by chlorofluorocarbons used in aerosols & refrigerants. First observed in 1980,the hole reaches a maximum in October,the Antarctic spring. It is visible here as the regions in shades of blue covering Antarctica (outlined in white) & beyond. The colours represent Dobson units,a measure of atmospheric ozone. The map was made by the Total Ozone Mapping Spectrometer (TOMS) on the American Nimbus-7 weather satellite,& coloured at Science Photo Library | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Coloured By John Wells / NASA |
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