Abstract
An index of dry-matter productivity is used to assess the sensitivity of bioresources in Alberta, western Canada, to changes in the thermal and precipitation regimes, particularly to climatic warming. Results suggest that warming would improve productivity in northern Alberta, but reduce it, because of the associated increased moisture stress, in the relatively warm, dry southeastern part of the province. Estimated productivity generally increased with precipitation regardless of location or temperature. Warming induced by CO2 quadrupling would apparently give a net increase of about 18% in bioresource productivity for the province, and CO2 doubling would lead to a 16% increase. However, the bioclimate would be changed much more than this might suggest. For CO2 quadrupling, Alberta would acquire a thermal regime similar to that of present-day Nebraska, some 2,000 km to the southeast. Also, the increase in productivity of plants due to the effects of CO2 on photosynthesis might be much larger than the climate-related effects. Climate impact assessment in Canada is made especially challenging by the shortness of the period of instrumental record, the relatively high degree of sensitivity to climatic change, and the sparseness of the station network, particularly in the most sensitive areas.
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Baier, W., Davison, H., Desjardins, R.L., Ouellet, C.E., and Williams, G.D.V.: 1976, ‘Recent Biometeorological Applications to Crops’, Int. J. Biometeor. 20, 108–127.
Barreto, L.S. and Soares, F.A.: 1974, ‘Zonagem Provisória de Mocambique Pelo Indice Climático de Potencialidade Agricola de Turc’, Rev. Ciencias Agronom., 7, 45–52.
Dumanski, J. and Stewart, R.B.: 1981, ‘Crop Production Potentials for Land Evaluation in Canada’, Report, Research Branch, Agriculture Canada, Ottawa.
Kimball, B.A.: 1983, ‘Carbon Dioxide and Agricultural Yield: An Assemblage and Analysis of 430 Prior Observations’, Agron. J. 75, 779–788.
Lozano, E.E.: 1968, ‘Location and Region: Agricultural Land Use in an Integrated Economy’, Harvard Papers in Theoretical Geography, Geography and the Properties of Surfaces Series, Paper No. 12, Harvard University, Cambridge, Massachusetts.
Manabe, S. and Stouffer, R.J.: 1979, ‘A Carbon Dioxide-Climate Sensitivity Study with a Mathematical Model of Global Climate’, Nature 282, 491–493.
Manabe, S. and Stouffer, R.J.: 1980, ‘Sensitivity of a Global Climate Model to an Increase of CO2 Concentration in the Atmosphere’, J. Geophys. Res. 85, 5529–5554.
Manabe, S., Wetherald, R.T., and Stoufler, R.J.: 1981, ‘Summer Dryness due to an Increase of Atmospheric CO2 Concentration’, Climatic Change 3, 347–386.
McRobie, G.: 1981, Small is Possible, Sphere Books, London.
National Defense University: 1980, Crop Yields and Climate Change to the Year 2000, Vol. 1, U.S. Government Printing Office, Washington, D.C.
Turc, L. and Lecerf, H.: 1972, ‘Indice Climatique de Potentialité Agricole’, Science du Sol 2, 81–102.
Williams, G.D.V.: 1969, ‘Estimated Effects on Canadian Prairie Wheat Production of Increasing Precipitation by Ten and Thirty Percent’, in Proceedings of 5th International Biometeorological Congress, pp. 85–66.
Williams, G.D.V.: 1970, ‘Effects on Canadian Prairie Wheat Production Estimates of Increasing Precipitation Amounts by 10 and 30%’, inJ. Maybank and W. Baier (eds.), Weather Modification, A Survey of Present Status with Respect to Agriculture, Research Branch, Agriculture Canada, Ottawa, pp. 124–133.
Williams, G.D.V.: 1975, ‘An Assessment of the Impact of Some Hypothetical Climatic Changes on Cereal Production in Western Canada’, in Proceedings of Conference on World Food Supply in Changing Climate, Sterling Forest, N.Y., December 2–5, 1974.
Williams, G.D.V.: 1983a, ‘Prairie Droughts as Indicated by Water-Based Wheat Yield Estimates’, Abstracts, Canadian Association of Geographers Annual Meeting, Department of Geography, University of Winnipeg, Winnipeg, Manitoba, May 30–June 4, 1983, pp. 74–75.
Williams, G.D.V.: 1983b, ‘Agroclimatic Resource Analysis — An Example Using an Index Derived and Applied for Canada’, Agric. Meteor. 28, 31–47.
Williams, G.D.V., Joynt, M.I., and McCormick, P.A.: 1975, ‘Regression Analyses of Canadian Prairie Crop District Cereal Yields, 1961–72, in Relation to Weather, Soil and Trend’, Can. J. Soil. Sci. 55, 43–53.
Williams, G.D.V. and Masterton, J.M.: 1983, ‘An Application of Principal Component Analysis and an Agroclimatic Resource Index to Ecological Land Classification for Alberta’, Climatol. Bull. 17, 3–28.
Williams, G.D.V., McKenzie, J.S., and Sheppard, M.I.: 1980, ‘Mesoscale Agroclimatic Resource Mapping by Computer, an Example for the Peace River Region of Canada’, Agric. Meteor. 21, 93–109.
Williams, G.D.V. and Oakes, W.T.: 1978, ‘Climatic Resources for Maturing Barley and Wheat in Canada’, in K.D. Hage and E.R. Reinelt (eds.), Essays on Meteorology and Climatology: In Honour of Richmond W. Longley, Studies in Geography Monograph 3, Department of Geography, University of Alberta, Edmonton, Canada, pp. 367–385.
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Williams, G.D.V. Estimated bioresource sensitivity to climatic change in Alberta, Canada. Climatic Change 7, 55–69 (1985). https://doi.org/10.1007/BF00139441
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DOI: https://doi.org/10.1007/BF00139441