Lec24_more_global_change_2013_st-1

Many of these have long atmospheric lifetimes 1974

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Unformatted text preview: of UV radia?on hiUng the Earth? •  _______________________ •  _______________________ •  _______________________ •  _______________________ •  _______________________ History of Ozone Depletion •  Chlorofluorocarbons (CFCs) developed in 1940’s and 50’s as: •  1970’s CFCs detected in upper atmosphere. – Many of these have long atmospheric lifetimes: •  1974 Rowland and Molina propose that CFC’s can destroy ozone in the stratosphere. – CFC contain chlorine (Cl) (from WMO Report 2003) The Chlorine Catalytic Cycle What causes the ozone hole? •  Ozone Hole Recipe (make your own!) –  1. _________________...
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This document was uploaded on 02/18/2014 for the course BIO 01:460:204 at Rutgers.

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