Ozone hole, September 2003

Ozone hole, September 2003

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This image is part of the sequence Environment: satellite maps of the ozone hole over the Antarctic from 1999 to 2007

Credit: NASA/SCIENCE PHOTO LIBRARY

Caption: Antarctic ozone hole. Coloured satellite image of low atmospheric ozone levels over Antarctica on 11th September 2003. The ozone hole (dark blue) is 28.2 million square kilometres in size. The largest hole was 29.2 million square kilometres in 2000. Ozone levels are colour-coded, from dark blue (lowest) through cyan and green to yellow (highest). The lowest levels here are around 40% of the normal level. Ozone absorbs harmful ultraviolet radiation from the Sun. Air pollution by chlorofluorocarbons (CFCs) and other compounds reduces ozone levels. The ozone hole size is predicted to decline over future years. Data from the Total Ozone Mapping Spectrometer (TOMS).

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