Minimum concentration of ozone in the southern hemisphere for each year from 1979-2013 (there is no data from 1995). Each image is the day of the year with the lowest concentration of ozone. A graph of the lowest ozone amount for each year is shown.
Related story: http://www.nasa.gov/content/goddard/international-action-against-ozone-depleting-substances-yields-significant-gains/
This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/vis/a010000/a011600/a011648/
