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Global Climate Change DigestArchives of the
Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999



Item #d94nov200

Scientists expected this year's Antarctic ozone hole to be less severe than it was over the last two years, because particles from the eruption of Mount Pinatubo, which assist in the chemical destruction of ozone, are nearly gone. However, the hole that developed in September and October was about as extensive as ever. Possible reasons include continued increases in the levels of chlorine and bromine in the stratosphere, lingering effects of volcanic aerosols, and unusually cold stratospheric temperatures. The World Meteorological Organization labeled this year's hole the deepest on record. (See Science, p. 217, Oct. 14; Science News, pp. 230-231, Oct. 8; Chem. Eng. News, p. 5, Oct. 10; Chem. & Industry, p. 807, Oct. 17.)

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