Satellite map of Antarctic upper ozone levels

Satellite map of Antarctic upper ozone levels

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Caption: Satellite map showing a severe depletion or "hole" in the ozone layer over Antarctica in October 1985. The hole is probably due to pollution of the atmosphere by chlorofluorocarbons (CFCs) used in aerosols & refrigerants. First seen in 1979, the hole has grown each year since. It reaches a maximum in October, the Antarctic spring. It is visible here as the purple/blue oval covering most of Antarctica (outlined in black). The colours represent 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.

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Keywords: antarctic, atmosphere, earth science, earth's, hole, in ozone layer, nimbus 7 imagery, ozone, ozone depletion, ozone hole, pollution, sciences

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