Ozone hole 2000

Ozone hole 2000

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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 depletion. Coloured satellite map of atmospheric ozone in the southern hemisphere on September 6, 2000. The ozone hole (pale blue) over Antarctica (dark blue) is at its 2000 maximum of 11 million square miles. The ozone layer's thick- ness is measured in Dobson Units (DU) with 300 being an average figure. The map is colour-coded: yellow to orange (300-340 DU), green to blue (200- 280 DU) and dark blue (100-200 DU). The ozone hole is due to atmospheric pollution by halogen compou- nds from halons like CFCs (chlorofluorocarbons). It is greatest around October during the Antarctic spring. Data from the TOMS (Total Ozone Mapping Spectrometer) instrument on the TOMS-EP satellite.

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Keywords: antarctica, atmosphere, atmospheric research, biosphere, cfc damage, damage, earth science, earth's, environmental issues, oxygen, ozone depletion, ozone hole, pollution effects, sciences, stratosphere, toms imagery, total ozone mapping spectromet, ultraviolet light

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