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Satellite maps showing variation in the ozone hole

Satellite maps showing variation in the ozone hole

E100/0035

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61.8 MB (3.6 MB compressed)

5524 x 3913 pixels

46.7 x 33.0 cm ⏐ 18.4 x 13.0 in (300dpi)

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Credit

NASA / SCIENCE PHOTO LIBRARY 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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