February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 8, NUMBER 2, FEBRUARY 1995
NEW EVIDENCE ON OZONE DEPLETION
National Aeronautics and Space Administration has released
satellite data described as providing conclusive evidence that
anthropogenic chemicals cause ozone destruction in the
stratosphere. Using three years of data from the Upper Atmosphere
Research Satellite, scientists have related distributions of CFCs
to their breakdown products, including hydrogen fluoride (HF),
which has no natural sources. The results refute claims, recently
popularized in books and on talk radio, that anthropogenic
chemicals are too heavy to reach the stratosphere, and that
observed declines in ozone over Antarctica and elsewhere are
caused by chemicals from natural sources such as volcanoes.
The World Meteorological Organization reported that in the
northern midlatitudes, average ozone levels between 40ĚN and
60ĚN reached new record lows in October and November.
See Science News, p. 422, Dec. 24-31 1994; Chem.
Eng. News, p. 9, Jan. 2 1995; Chem. & Industry, p.
3, Jan. 2 1995; Intl. Environ. Rptr., p. 14, Jan. 11 1995; Global
Environ. Change Rep., pp. 5-6, Dec. 23 1994.
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