Ozone hole, September 2001

Ozone hole, September 2001

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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 reduced atmospheric ozone levels around Antarctica (lower centre, darkest blue) on 17 September 2001. The ozone hole (dark blue) is at an annual maximum area (26 million square kilometres that year). The ozone levels are colour-coded, ranging from dark blue (low) through light blue and green to yellow (high). Ozone (O3) absorbs dangerous ultraviolet radiation from the Sun. Atmospheric pollution by chlorofluorocarbons (CFCs) and similar compounds reduces ozone levels. The maximal ozone hole size, similar to the 3 previous years, is predicted to slowly decline over future years. Data from the TOMS (Total Ozone Mapping Spectrometer) sensor.

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