Reductions in ozone at high concentrations of stratospheric halogens.
An increase in the concentration of inorganic chlorine to levels comparable to that of oxidized reactive nitrogen could cause a significant change in the chemistry of the lower stratosphere leading to a reduction potentially larger than 15% in the column density of ozone.  This could occur, for example by the middle of the next century, if emissions of man-made chlorocarbons were to grow at a rate of 3% per year.  Ozone could be further depressed by release of industrial bromocarbon.
Prather
M J
MJ
Center for Earth and Planetary Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
McElroy
M B
MB
Wofsy
S C
SC
D001272:Atmosphere / Q000737:chemistry*; D001966:Bromine / Q000032:analysis*; D002713:Chlorine / Q000032:analysis*; D017402:Chlorofluorocarbons / Q000032:analysis; D006219:Halogens / Q000032:analysis; D017665:Hydroxyl Radical / Q000032:analysis; D008697:Methane / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010126:Ozone / Q000032:analysis*; D010777:Photochemistry
D017402:Chlorofluorocarbons; D006219:Halogens; D017665:Hydroxyl Radical; D002713:Chlorine; D010126:Ozone; D009584:Nitrogen; D008697:Methane; D001966:Bromine