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