Developing Ozone Hole

Developing Ozone Hole

 

Maps showing the maximum extent of the ozone hole over the Antarctic for each year from 1979 (top left) to 2014, gathered from ultraviolet reflectance and transmission data from a variety of satellites. No data are available for 1995 (near upper right) as no suitable satellites were in orbit. The ozone hole is seen as a dark blue and magenta patch in each frame, defined by the region where the ozone concentration is less than 220 Dobson Units (DU). The largest hole was seen in 2006 (bottom left) when it covered 27 million square kilometres. Ozone is destroyed by man-made chemicals such as chlorofluorocarbons (CFCs) in the atmosphere. Ozone in the stratosphere is critical to human life as it absorbs much of the harmful ultraviolet light from the Sun.

Image © NASA Ozone Watch

 

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