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 2, NUMBER 9, SEPTEMBER 1989
"Assessing Economic Benefits of Climate Change on Canada's
Boreal Forest," G.C. Van Kooten (Dept. Mgmt., Univ. Groningen, Groningen,
Neth.), L.M. Arthur, Can. J. For. Res., 19(4), 463-470, 1989.
Uses methods developed in applied welfare economics to test two climate
scenarios, both based on general circulation models for doubled concentrations
of atmospheric CO2. Under both scenarios forest productivity increases, but
benefits accrue primarily to Canada's trading partners.
"Utilization of Potatoes for Life Support Systems in Space. IV.
Effect of CO2 Enrichment," R.M. Wheeler (Bionetics Corp., Mail Code BIO-3,
Kennedy Space Ctr., FL 32899), T.W. Tibbitts, Amer. Potato J., 66,
Norland and Russet Burbank potatoes were grown in solid stands in separate
controlled environment rooms at two CO2 levels, 365 and 1000 ppm. Yield data
showed only marginal benefits from CO2 enrichment. The best productivity
obtained in this study indicates that the dietary energy need of one human in
space could be supplied from 34 m2 of potatoes.
"Response of Soybean to Air Temperature and Carbon Dioxide
Concentration," J.T. Baker (Agron. Dept., Univ. Florida, Gainesville FL
32611), L.H. Allen et al., Crop Sci., 29(1), 98-105, Jan./Feb.
Determined the effects and interactions of CO2 concentration and air
temperature on the development, growth, total nonstructural carbohydrate and
final seed yield of soybean grown season-long in naturally lit,
controlled-environment chambers. Both CO2 enrichment and increasing air
temperature decreased main stem plastochron interval, while increasing air
temperature increased final main stem node number. Overall, the study
illustrated that the response of soybean to the direct and interactive effects
of season-long exposure to different temperature and CO2 treatments is complex
"The Effects of Preindustrial and Future CO2 Concentrations on
Growth, Dry Matter Production and the C/N Relationship in Plants at Low Nutrient
Supply: Vigna unguiculata (Cowpea), Abelmoschus esculentus
(Okra) and Raphanus sativus (Radish)," D. Overdieck (Univ. Osnabrück,
FB Biol./Chem., Barbarastr. 11, D-4500 Osnabrück, FRG), Ch. Reid, B.R.
Strain, Angew. Botanik., 62, 119-134, 1988.
Studied the effects of changes in CO2 concentrations on herbaceous annual
plants grown from seed for 32-34 days in environmentally controlled chambers.
Among the results: the highest N contents on a total dry weight basis were found
at a CO2 concentration of 270 micro L L-1, medium N contents at 350 micro L L-1,
and the lowest N contents at 650 micro L L-1. C/N ratios increased with
increasing atmospheric CO2 concentrations except for cowpea roots. Total
absolute carbon accumulated per plant increased 20-63% between the 270 to 650
micro L L-1 treatments by the end of the study.)
"Repercussions of a CO2 Doubling on the Water Cycle and on the Water
Balance--A Case Study for Belgium," F. Bultot (Hydrol. Sect., Royal Meteor.
Inst., B-1180 Uccle-Brussels, Belgium), A. Coppens et al., J. Hydrol.,
99(3/4), 319-347, May 30, 1988.
Three drainage basins in Belgium were chosen to evaluate the common
responses to a CO2 doubling and also show differences ascribable to the specific
characteristics of each of these catchments. Potential and effective
evapotranspiration, soil moisture, snow lying episodes, groundwater storage,
flow components at the outlet and water budgets were simulated in a daily step
conceptual hydrological model for present-day climate conditions and for a CO2
doubling case over an 80-year period.
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