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 6, DECEMBER 1988
"Atmospheric CO2 Enrichment and Plant Dry Matter Content," S.B.
Idso (U.S. Water Conserv. Lab., 4331 E. Broadway, Phoenix AZ 85040), B.A.
Kimball, J.R. Mauney, Agric. & Forest Meteorol., 43(2),
171-181, July 1988.
While studies have shown that increasing the CO2 content of the atmosphere
generally increases the rates at which plants grow and the harvestable yields
they produce, effects on plant dry matter have rarely been considered. Results
of a number of CO2 enrichment experiments with six terrestrial plants and two
aquatic species, and similar data from the literature, show that, in general,
CO2 enrichment has little effect on plant percentage dry matter. An exception is
under conditions conducive to starch accumulation in leaves, when it causes an
"The Potential Impacts of a Scenario of CO2-Induced Climatic Change
on Ontario, Canada," S.J. Cohen (Atmos. Environ. Svc. CCAI, 4905 Dufferin
St., Downsview, Ont. M3H 5T4, Can.), T.R. Allsopp, J. Climate, 1(7),
669-681, July 1988.
Describes a pilot study conducted by Environment Canada, which emphasized
the approach and process required to investigate potential regional impacts in
an interdisciplinary manner, rather than producing a forecast. A climate
scenario was adapted from results of the NASA-GISS model; monthly mean
temperatures and precipitation predicted at grid points were used with existing
physical and statistical models to project effects on Great Lakes net basin
supplies, levels and outflows, subbasin streamflow, snowfall and length of
season. The study then addressed impacts on natural resources and related
activities such as commercial navigation, water use, tourism and residential
heating. Recommendations were made for adaptation strategies and future
"Climate Fluctuations and Record-High Levels of Lake Michigan,"
S.A. Changnon Jr. (Ill. State Water Survey, Champaign IL 61820), Bull. Amer.
Meteorol. Soc., 68(11), 1394-1402, Nov. 1987.
Reviews development and impact of high water levels reached during 1985 and
1986. Most impacts on the lake have been disastrous with beaches destroyed,
shorelines eroded, and near-shore structures badly damaged. Costly adjustments
are underway by individuals, communities and state agencies. The situation
illustrates how our complex society is vulnerable to climate fluctuations; in
such a regional case, when any extreme has advantages and disadvantages to
different economic interests, resolution is most likely to be successful at the
regional policy level.
"Soil Moisture and Runoff in the USSR During Global Warming,"
K.Ya. Vinnikov (State Hydrol. Inst.), N.A. Lemshko, Soviet Meteor. &
Hydrol., No. 12, 79-85, 1987. (Translation of Meteorologia i Gidrologiya,
No. 12, 96-103, 1987.)
Gives estimates of the variations of annual runoff and summer soil moisture
content for three climate scenarios in the USSR, corresponding to global
warmings of 0.5, 1.2 and 2 ĚC from the present climate. Calculations are
based on a comprehensive method of determining evaporation from the land
surface; scenarios are based on analysis of empirical data on modern climate
variations, and on paleoclimatic reconstructions.
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