February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 5, NUMBER 9, SEPTEMBER 1992
STRATOSPHERIC OZONE: TRENDS
"The Changing Stratosphere," M.B. McElroy (Dept. Earth Sci.,
Harvard Univ., Cambridge MA 02138), Plan. Space Sci., 40(2-3),
373-401, Feb.-Mar. 1992.
Begins with a detailed review of the chemistry of springtime Antarctic ozone
depletion, including some discussion of midlatitude processes. Then discusses
implications for climate of changes in the abundance of ozone in the tropical
lower stratosphere. The relatively warm climates of the Eocene and Cretaceous
periods and the cold climates of the recent glacial epochs may be associated
with shallower and deeper stratospheres, respectively, and with fluctuations in
the Hadley circulation. Lower stratospheric ozone levels may be influenced by
levels of CO2.
"Ozone Depletion in the Upper Atmosphere Estimated from Satellite
and Space Shuttle Data," E. Hilsenrath (NASA-Goddard, Greenbelt MD 20771),
R.P. Cebula, C.H. Jackman, Nature, 358(6382), 131-133, July 9,
While ozone losses due to heterogeneous reactions involving chlorine and
bromine are greatest in the lower stratosphere (near 20 km), the question of
depletion in the upper stratosphere (near 45 km) has been unresolved. This paper
shows that ozone concentration at the latter level has decreased over the 1980s
by about 7%, with implications for the radiative properties of the upper
"Comparisons of Observed Ozone and Temperature Trends in the Lower
Stratosphere," A.J. Miller (NOAA Clim. Analysis Ctr., 5200 Auth Rd.,
Washington DC 20233), Geophys. Res. Lett., 19(9), 929-932, May
Uses a 62-station set of rawindsonde observations to compare negative trends
in stratospheric ozone from 1970 with trends in temperature at the same
altitude, and compares results to changes in temperature determined from a
radiative equilibrium model. Calculated and observed trends agree in shape and
"Revision of 20 Years of Dobson Total Ozone Data at Uccle (Belgium):
Fictitious Dobson Total Ozone Trends Induced by Sulfur Dioxide Trends," D.
De Muer (Belgian Meteor. Inst., Ringlaan 3, B-1180, Brussels), H. De Backer,
J. Geophys. Res., 97(D5), 5921-5937, Apr. 20, 1992.
Careful processing of Dobson data at Uccle shows that an approximate
revision to data used in the report of the International Ozone Trends Panel is
not reliable. Further analysis shows that a trend of increasing SO2 over the
past two decades has introduced a fictitious downward total ozone trend over
that period; this factor must be considered in any study of global ozone trends
from Dobson data.
"Stratospheric Ozone Profile and Total Ozone Trends Derived from the
SAGE I and SAGE II Data," M.P. McCormick (NASA-Langley, Hampton VA 23665),
R.E. Veiga, W.P. Chu, Geophys. Res. Lett., 19(3), 269-272, Feb.
Statistical analysis of data for the period 1979-1991 shows that the
trend in column ozone above 17 km is nearly zero at the tropics,
but is -0.6% per year at 60--S and -0.35% per year at 60--N. Most column
ozone loss occurs between 17 and 20 km.
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