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 7, NUMBER 9, SEPTEMBER 1994
PROFESSIONAL PUBLICATIONS... OF GENERAL INTEREST: OZONE DEPLETION
"Ozone Depletion: 20 Years After the Alarm," F.S.
Rowland (Dept. Chemistry, Univ. California, Irvine, Calif.), M.J.
Molina, Chem. Eng. News, pp. 8-13, Aug. 15, 1994.
The chemists who issued the first warning that chlorine from
CFCs could destroy ozone in the stratosphere reflect extensively
on the enormous changes that have occurred in the past two
decades in atmospheric science, environmental policy and the CFC
industry. The rapid development and acceptance of the Montreal
Protocol offers considerable promise for the handling of future
global environmental problems.
"Chemical Depletion of Ozone in the Arctic Lower
Stratosphere During Winter 1992-93," G.L. Manney (Jet
Propulsion Lab., 4800 Oak Grove Dr., Pasadena CA 91109), L.
Froidevaux et al., Nature, 370(6489), 429-433, Aug.
Satellite observations supplemented with other analyses show
that the roughly 20% decrease in Arctic lower stratospheric ozone
in February and March 1993 is inconsistent with changes expected
from transport alone, but is consistent with observed levels of
clorine monoxide and associated depletion by chlorine chemistry.
As chlorine levels continue to increase, ozone depletion in the
region is likely to equal or exceed that of 1993 in the near
"Minimal Effects of UV-B Radiation on Antarctic Diatoms Over
the Past 20 Years," A. McMinn (Antarctic CRC, Univ.
Tasmania, Box 252C, Hobart 7001, Tasmania, Australia), H.
Heijnis, D. Hodgson, ibid., 370(6490), 547-549,
Aug. 18, 1994.
Presents analyses of diatom assemblages from high-resolution
stratigraphic sequences from anoxic basins in fjords of Vestfold
Hills, Antarctica. Although the phytoplankton community there has
already experienced about 20 years of exposure to increasing
levels of UV-B radiation, little change could be detected in
diatom composition. Results should apply to other Antarctic
coastal regions, where thick ice cover and the timing of
phytoplankton bloom offer protection from the effects of
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