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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

PROFESSIONAL PUBLICATIONS...
IMPACTS

Item #d89sep34

"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.

Item #d89sep35

"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, 25-34, 1989.

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.

Item #d89sep36

"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. 1989.

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 and varied.

Item #d89sep37

"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.)

Item #d89sep38

"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.