February 28, 2007
GCRIO Program Overview
Our extensive collection of documents.
Archives of the
Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 7, NUMBER 4, APRIL 1994
- STRATOSPHERIC OZONE: TRENDS
Trend Analysis of Published Ground-Based and TOMS Total Ozone
Data Through 1991," G.C. Reinsel (Dept. Stat., Univ.
Wisconsin, Madison WI 53706), G.C. Tiao et al., J. Geophys.
Res., 99(D3), 5449-5464, Mar. 20, 1994.
Data for 1964-1991 show negative trends at higher northern
latitudes in winter and spring and at higher southern latitudes
in all seasons, and a trend near zero in all seasons at latitudes
Ozone Amounts During 1992-1993 from Nimbus 7 and Meteor 3 Total
Ozone Mapping Spectrometers," J.R. Herman (Lab. Atmos.,
NASA-Goddard, Greenbelt MD 20771), D. Larko, ibid., 99(D2),
3483-3496, Feb. 20, 1994.
There has been a nearly linear decrease in global ozone from
1979 to 1991, ranging from no change at the equator, to decreases
per decade of 4-6% at midlatitudes and 10-12% at higher
Hemisphere Total Ozone Values from 1989-1993 Determined with the
NOAA-11 Solar Backscatter Ultraviolet (SBUV/2) Instrument,"
W.G. Planet (Satellite Res. Lab., NESDIS, Washington DC 20233), Geophys.
Res. Lett., 21(3), 205-208, Feb. 1, 1994.
Total ozone showed a decrease from the interval average from
summer 1992 into 1993, and returned to more normal levels in late
Trends and Annual Releases of CCl3F and CCl2F2 Estimated from
ALE/GAGE and Other Measurements from July 1978 to June
1991," D.M. Cunnold (Sch. Earth & Atmos. Sci., Georgia
Inst. Technol., Atlanta GA 30332), P.J. Fraser et al., J.
Geophys. Res., 99(D1), 1107-1126, Jan. 20, 1994.
For 1978-1988, average rates of increase in the lower
troposphere were 9.2 ppt/yr for CCl3F and 17.3 ppt/yr for CCl2F2.
These rates used in a 2-D model indicate that global releases in
1990 were 249 ± 28 x 106 kg for CCl3F and 366 ± 30 x 106 kg for
from Geophys. Res. Lett., 20(24), Dec. 23, 1993:
"Trends in Total Ozone over Southern African Stations
Between 1979 and 1991," S. Kalicharran (Dept. Geog. &
Environ. Sci., Univ. Natal, Durban, S. Africa), R.D. Diab, F.
Sokolic, 2877-2880. TOMS data at most stations showed a decrease
in total ozone over the period, ranging between -1.1% and -2.6%
over most of the country of South Africa.
"Total Ozone Trends over Low Latitude Indian
Stations," N. Kundu (Natl. Phys. Lab., New Delhi 110012,
India), M. Jain, 2881-2883. Statistical analysis applied to
Dobson data showed a small positive trend near the equator from
1965 to 1991, decreasing to negative values at higher latitudes.
Ozone Variations at Reykjavík Since 1957," G.G. Bjarnason
(Sci. Inst., Univ. Iceland, Dunhagi 3, IS-107 Reykjavík,
Iceland), Ö.E. Rögnvaldsson et al., J. Geophys. Res., 98(D12),
23,059-23,077, Dec. 20, 1993.
Comparison of Dobson data obtained at Reykjavík with zonally
averaged TOMS data at this latitude suggests a significant
longitudinal dependence of the linear trends in stratospheric
Depletion at Northern and Southern Latitudes Derived from January
1979 to December 1991 Total Ozone Mapping Spectrometer
Data," J.R. Herman (Lab. Atmos., NASA-Goddard, Greenbelt MD
20771), ibid., 98(D7), 12,783-12,793, July 20.
In both hemispheres ozone decreased at latitudes above 30·
more than predicted by homogeneous chemistry models; the largest
decreases occurred in the Southern Hemisphere during winter and
spring. The eruption of Mount Pinatubo was the only volcanic
activity that affected stratospheric ozone during that period.
Guide to Publishers
Index of Abbreviations