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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 2, NUMBER 11, NOVEMBER 1989
PROFESSIONAL PUBLICATIONS...
TREND ANALYSIS
Item #d89nov53
 "Secular Increase of the Total Vertical Column Abundance of Carbon
Monoxide Above Central Europe Since 1950," R. Zander (Inst. Astrophys.,
Univ. Liège, B-4200, Liège-Ougrée, Belgium), Ph. Demoulin
et al., J. Geophys. Res., 94(D8), 11,021-11,028, Aug. 20, 1989.
Derives the abundance of CO from sets of infrared solar spectra recorded
from an altitude of 3.58 km in 1950-1951 and 1985-1987. Found the mean
cumulative rate of increase of the total column abundance of CO above the
Jungfraujoch Station to be (0.85 <F128>æ<F14> 0.20)% yr<M >-1<D>
between the two periods. The present findings are compared with trends reported
in earlier studies.
Item #d89nov54
"Secular Increase of the Vertical Column Abundance of Methane
Derived from IR Solar Spectra Recorded at the Jungfraujoch Station," R.
Zander (address immed. above), Ph. Demoulin et al., ibid.,
11,029-11,039.
Reevaluates the increase of the vertical column abundance of CH4 over the
station in 1951, 1975 and in 1984-1987. The mean cumulative rate of increase of
the total vertical column abundance of CH4 was found to be (0.7 <F128>æ<F14>
0.1)% yr<M^>-1<D> between 1951 and 1986. Deduced that the volume
mixing ratios at the altitude of the station were 1.28 <F128>æ<F14>
0.08 and 1.64 <F128>æ<F14> 0.09 ppm for 1951 and for
1985-1987, respectively.
Item #d89nov55
"Dangers of Multiyear Averaging in Analyses of Long-Term Climate
Trends," C.L. Parkinson (Oceans & Ice Br., Code 671, NASA/Goddard Space
Flight Ctr., Greenbelt MD 20771), Clim. Dynamics, 4(1), 39-44,
June 1989.
Shows that a change of one year in the starting point of the averaging done
in generating a multiyear-average sequence can make a dramatic difference in the
appearance of the sequence, even determining whether the apparent trend is
upward or downward. Presents historical sea-ice data from Iceland to illustrate
with a long-term climate data set the misrepresentation of climate statistics
possible through selective multiyear averaging.
Item #d89nov56
"Global Marine Temperature Variation and the Solar Magnetic Cycle,"
N.E. Newell (45 Jason St., Arlington MA 02174), R.E. Newell et al., Geophys.
Res. Lett., 16(4), 311-314, Apr. 1989.
Uses harmonic analysis to study global and hemispheric marine temperatures
for 1985-1986. Found a prominent 22-year peak which may be related to the solar
magnetic cycle. The low frequency data show a major dip centered around the
period 1905-1910. These results should be considered in any analysis of global
marine temperature trends.
Item #d89nov57
"Spectroscopic Measurements of Atmospheric Carbon Monoxide and
Methane. 2: Seasonal Variations and Long-Term Trends," V.I. Dianov-Klokov
(Inst. Atmos. Phys., Acad. Sci., Moscow 109017, USSR), L.N. Yurganov, J.
Atmos. Chem., 8(2), 153-164, Feb. 1989.
Reports results of spectroscopic total column measurements of CO and CH4 at
different points in the Northern and Southern Hemispheres from 1970-1985. Found
an increase in the Northern Hemisphere of 1.5-2% per year and 1.2% per year for
CO and CH4, respectively. An increasing rate was not detected in the Southern
Hemisphere.
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