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 10, OCTOBER 1995
OF GENERAL INTEREST: OZONE DEPLETION
"Emission Measurements of the Concorde Supersonic Aircraft in the
Lower Stratosphere," D.W. Fahey, . .J.C. Wilson (Dept. Eng., Univ. Denver,
Denver CO 80208) et al., Science, 270(5233), 70-74, Oct. 6,
Emission indices of reactive gases and particles were determined from
measurements in the exhaust plume of a Concorde cruising at supersonic speed in
the stratosphere. Observation of large numbers of submicrometer particles
indicates a surprisingly efficient conversion of fuel sulfur to sulfuric acid. A
new fleet of supersonic aircraft with similar particle emissions would
significantly increase stratospheric aerosol surface areas, and might increase
ozone loss above that expected from NOx emissions alone.
"A Global Three-Dimensional Study of the Fate of HCFCs and HFC-134a
in the Troposphere," M. Kanakidou (Ctr. Faibles Radioactiv., Lab. mixte
CNRS-CEA, Ave. de la Terrasse, 91198, Gif-sur-Yvette Cedex, France), F.J.
Dentener, P.J. Crutzen, J. Geophys. Res., 100(D9),
18,781-18,801, Sep. 20, 1995.
Presents the first attempt to use a global, 3-D model of the troposphere to
study the degradation and removal of the CFC alternatives HCFC-22, HCFC-123,
HCFC-124, HFC-134a, HCFC-141b, and HCFC-142b. Maximum deposition occurs in
tropical regions, associated with high oxidation rates and high rainfall. These
predicted concentrations and deposition fluxes are orders of magnitude smaller
than what is thought to be toxic for humans, flora and fauna.
"Estimating the Global Ozone Characteristics During the Last 30
Years," R.D. Bojkov (Atmos. Environ. Serv., 4905 Dufferin St., Downsview ON
M3H 5T4, Can.), V.E. Fioletov, ibid., 100(D8), 16,537-16,551,
Aug. 20, 1995.
Summarizes the analysis of all available total ozone data from over 150 past
and present Global Ozone Observing System stations, to deduce basic ozone
characteristics over the period 1964-1994, both before and during the decades of
drastic Antarctic ozone decline. The globally averaged ozone decline is about
5%, and is much stronger during the Antarctic spring and northern winter-spring
seasons, where it has accelerated during the last 10 years.
Guide to Publishers
Index of Abbreviations