9-03 HISTORY OF THE OZONE LAYER

9-03 HISTORY OF THE OZONE LAYER - HISTORY OF THE OZONE...

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HISTORY OF THE OZONE LAYER Outline 600,000,000 B.C. Ozone layer forms late 1830's Christian Schöenbein identifies ozone in the laboratory 1845 Auguste de la Rive and Jean-Charles de Marignac suggest ozone is a form of oxygen; confirmed by Thomas Andrews in 1856 1858 Andrei Houzeau finds ozone present in natural air 1865 Jean-Louis Soret proves that ozone is O 3 1879 Marie Alfred Cornu measures solar spectrum and finds sharp cutoff in ultraviolet (UV) light 1881 Walter Hartley recognizes cutoff corresponds to UV absorption by ozone 1913 John William Strutt (Lord Rayleigh) shows absorption is not in lower atmosphere 1919 Charles Fabry makes first spectrometric measurements of "thickness" of ozone layer 1924 G.M.B. Dobson develops ozone spectrophotometer and begins regular measurements of ozone abundance ( Arosa, Switzerland ) 1925 Jean Cabannes and Jean Dufay show ozone is about 10 miles high 1928 Thomas Midgley synthesizes chlorofluorocarbons (CFC's) 1929 Umkehr method for Dobson instrument establishes that ozone maximum is below 15
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9-03 HISTORY OF THE OZONE LAYER - HISTORY OF THE OZONE...

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