Ozone destruction closer to home

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Author: Richard A. Kerr
Date: Mar. 16, 1990
From: Science(Vol. 247, Issue 4948)
Publisher: American Association for the Advancement of Science
Document Type: Article
Length: 700 words

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Ozone Destruction Closer to Home Researchers appear to have forged another link in the chain connecting man-made chlorofluorocarbons (CFCs) to losses of protective ozone over the populous mid-latitudes of the Northern Hemisphere. From Oslo to New Orleans, the ozone screen has thinned about 5% during the winter months of the past 10 years. The question: Is the ozone being destroyed by CFS, in which case things could get worse, or are less sinister, natural variations behind the decline?

The finger of suspicion pointed to the CFCs a year ago when an airborn expedition probing the Arctic stratosphere found an abundance of ozone-destroying chlorine from CFCs (Science, 24 February 1989, p. 1007). But expedition researchers had their hands full showing that the chlorine was actually destroying the Arctic ozone. Now it may have finally been caught in the act.

The first direct evidence against CFC as the culprit comes in a series of papers published in this month's Geophysical Research Letters, a special issue devoted to results from last year's expedition. As summarized in a prologue...

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Gale Document Number: GALE|A8943469