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 1, NUMBER 3, SEPTEMBER 1988
"Global Trends in Total Ozone," K.P. Bowman (Dept. Atmos. Sci.,
Univ. Illinois, Urbana IL 61801), Science, 239, 48-50, Jan. 1,
Satellite ozone data from the Total Ozone Mapping Spectrometer from 1979
through 1986 show that recent decreases of total ozone are global in extent and
have not been confined to the Antarctic spring ozone hole. The decreases are
largest in middle and high latitudes and occur in all seasons.
"An Update through 1985 of the Variations in Global Total Ozone and
North Temperate Layer-Mean Ozone," J.K. Angell (Air Resour. Lab., NOAA,
Silver Spring, Md.), J. Clim. Appl. Meteor., 27(1), 91-97, Jan.
Total-ozone variations in five climatic zones and the world as a whole, as
well as ozone variations in tropospheric and stratospheric layers of the north
temperate zone, have been updated through 1985 by means of Dobson, ozonesonde
and Umkehr observations. Based on linear regression, between 1980 and 1985 the
year-average total ozone decreased by 2-3% in the north polar, north and south
temperate, and tropical zones, but by almost 6% in the south polar zone.
Observations for 16-24 and 24-32 km layers of the north temperate zone show
record low ozone values in 1983 and 1985. There is little evidence of
appreciable changes in tropospheric ozone during 1980-85.
"Detecting Changes in Global Climate Induced by Greenhouse Gases,"
T.M. Barnett (Climate Res., Scripps Inst. Oceanogr., San Diego CA 92093), M.E.
Schlesinger, J. Geophys. Res., 92(D12), 14,722-14,780, Dec. 20,
A statistical search for a theoretically predicted CO2 signal in surface air
temperature data extended back to 1899 was influenced by artifacts of
decadal-scale variations at the ends of the record. Application of the "fingerprint"
strategy to three different global fields of climate variables over the last
23-35 years showed no significant CO2 signal, but demonstrated the need to use
model signal-to-noise ratios in selecting fields for subsequent analysis and
multiple fields in the detection process. The primary pattern of natural air
temperature variability was very similar to the expected CO2 signal; ocean
surface temperatures may be better.
"An Approach to Adjusting Climatological Time Series for
Discontinuous Inhomogeneities," T.R. Karl (Nat. Clim. Data Ctr., Asheville
NC 28801), C.N. Williams Jr., ibid., 26(9), 1744-1763, Sep.
A method is described whereby climatological time series of temperature and
precipitation can be adjusted for station inhomogeneities using station history
information. It has been applied to over 1200 stations in the U.S. In many
instances the adjustments in temperature time series are substantial (as large
as actual climate fluctuations during the twentieth century), often leading to a
more consistent pattern of regional climate change than would otherwise be
surmised from inspection of the unadjusted data.
"Mean Air Temperature Variations of the Northern Hemisphere for
1841-1985," K.Ya. Vinnikov, P.Ya. Groisman et al., Sov. Meteor. Hydrol.
(Meteor. Gidrol.), No. 1, 45-55, 1987.
Statistically optimal averaging is applied to data from around 300
meteorological stations to estimate the variation of the mean annual surface air
temperature and the mean monthly surface air temperature for the entire Northern
Hemisphere. Results support the development of global warming.
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