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Christian Schöenbein identifies ozone in the laboratory.
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Auguste de la Rive and Jean-Charles de Marignac suggest ozone is a form of oxygen; confirmed by Thomas Andrews in 1856.
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Andrei Houzeau finds ozone present in natural air.
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Jean-Louis Soret proves that ozone is O3
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Marie Alfred Cornu measures solar spectrum and finds sharp cutoff in ultraviolet (UV) light.
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Walter Hartley recognizes cutoff corresponds to UV absorption by ozone
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John William Strutt (Lord Rayleigh) shows absorption is not in lower atmosphere.
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Charles Fabry makes first spectrometric measurements of "thickness" of ozone layer
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G.M.B. Dobson develops ozone spectrophotometer and begins regular measurements of ozone abundance (Arosa, Switzerland)
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Sean Cabannes and Jean Dufay show ozone is about 10 miles high
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Thomas Midgley synthesizes chlorofluorocarbons (CFC's)
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Umkehr method for Dobson instrument establishes that ozone maximum is below 15 miles altitude
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Sydney Chapman describes theory that explains existence of an ozone "layer"
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Sherwood Rowland and Mario Molina warn of ozone depletion due to CFC's
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First international meeting (Washington DC) to address issue of ozone depletion held by the United Nations Environmental Programme (UNEP)
