An Unimagined but Very Real Threat to the Earths Stratospheric Ozone

An Unimagined but Very Real Threat to the Earth s Stratospheric Ozone 

CCI3F and other CFCs are nonpolar compounds and, unlike HCl, are not washed from the atmosphere by rain. Unlike compounds such 

Molina would accept a faculty position at Irvine, move to the Jet Propulsion Laboratory in Pasadena, and then resume his academic career at MIT where he now resides. 

For more than 80 years atmospheric ozone has been measured from the ground using a Dobson UV spectrometer, invented by Gordon M. B. Dobson (1889-1976), that measures UV absorbance through a vertical ozone column simultaneously at two wavelengths ( 90 percent of 

During the 15-year period from 1979 throu 1994, the stratospheric levels of ozone declined. Darker regions in these two plots represent lower levels of stratospheric ozone. The decline of stratospheric ozone, due to chlorofluorocarhons (CFCs) in large part, is readily seen in the northward movement of ozone-poor regions in the stratosphere. 

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