Satellite maps showing variation in the ozone hole

Satellite maps showing variation in the ozone hole

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Credit: NASA/SCIENCE PHOTO LIBRARY

Caption: Satellite maps showing the variation in ozone depletion - the ozone "hole" - over Antarctica between 1985 & 1988. The hole is probably due to pollution of the atmosphere by chlorofluorocarbons (CFCs) used in aerosols & refrigerants. The hole develops each October, during the Antarctic spring. The colours represent Dobson units - a measure of atmospheric ozone - as shown in the scale at right. The lowest ozone levels were measured during 1985 & 1987 (purple/pink shading), with a record low in 1987. During 1986 & 1988, ozone depletion was not as severe as it was during the odd numbered years. The maps were made by the US 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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