The References Of Climate Variability

Akinremi, O. O., McGinn, S. M., and Cutforth, H. W.: 1999, 'Precipitation trends on the Canadian

Prairies', J. Climatic 12, 2996-3003. Bootsma, A.: 1994, 'Long-term (100 YR) climatic trends for agriculture at selected locations in

Canada', Clim. Change 26, 65-88. Bootsma, A.: 1997, 'A review of Impacts of Climate Variability and Change on Agriculture in Atlantic Canada', in Shaw, R. W. (ed.), 1997 Climate Change and Climate Variability in Atlantic Canada, Workshop Proceedings, 3-6 December 1996, Environment Canada. pp. 348. Bootsma, A., Gameda, S., and McKenney, D. W.: 2001, 'Adaptation of agricultural production to climate change in Atlantic Canada', Final Report for Climate Change Action Fund Project

A214. Eastern Cereal and Oilseed Research Centre (ECORC), Agriculture and Agri-Food Canada (AAFC).

Bugliarello, A.: 1989, 'Technology and the Environment', in Botkin, D. B., Caswell, M. F., Estes, J. E., and Orio, A. A. (eds.), Changing the Global Environment, Perspectives on Human Involvement, Academic Press, Inc., San Diego, California.

Canadian Council of Forestry Ministers.: 2001, Criteria and Indicators. Progress to date. Criteria 2: Ecosystem Condition and Productivity, Element 2.1: Disturbance and Stress, p. 36.

Canadian Forest Service: 2001, An Overview of Canada's Forests, State of Canada's Forest 2001.

Changnon, S. A.: 1999, 'A rare long record of deep soil temperatures defines temporal temperature changes and an urban heat island', Clim. Change 42, 532-538.

De Jong, R., Li, K. Y., Bootsma, A., Huffman, T., Rohloff, G., and Gameda, S.: 2001, Final Report for Climate Change Action Fund Project A080. Eastern Cereal and Oilseed Research Centre (ECORC), Agriculture and Agri-Food Canada.

Desjardins, R. L., Kulshrestha, S. N., Junkins, B., Smith, W., Grant, B., and Boehm, M.: 2001, 'Canadian greenhouse gas mitigation options in agriculture', Nutr. Cycling Agroecosyst. 60, 317-326.

Dow, C. L. and DeWalle, D. R.: 2000, 'Trends in evaporation and Bowen ratio on urbanizing watersheds in eastern United States', Water Resour. Res. 36, 1835-1843.

Environment Canada: 1997a, 'The Canada Country Study (CCS): Climate impacts and adaptation', National Summary for Policy Makers, Environment Canada Inquiry Centre, 351 St. Joseph Boulevard, Gatineau, Quebec, K1A 0H3,

Environment Canada: 1997b, 'The Canada Country Study (CCS): Climate impacts and adaptation', Highlights for Canadians, Environment Canada Inquiry Centre, 351 St. Joseph Boulevard, Gatineau, Quebec, K1A 0H3,

Environment Canada: 1999, 'The Canada Country Study (CCS): Climate impacts and adaptation', Vol. VII, National Sectoral Volume, Executive Summary, Environment Canada Inquiry Centre, 351 St. Joseph Boulevard, Gatineau, Quebec, K1A 0H3,

Environment Canada: 2002/2003, 'Climate trends and variations bulletin for Canada, Annual 2001 temperature and precipitation in historical perspective', Environment Canada, Meteorological Service of Canada, Climate Research Branch p. 3, bulletin/annual01/pchttrnd_e.html

Gadgil, S., Seshagiri Rao, R, R., Narahari Rao, K., and Savithri, K.: 2000, 'Farming Strategies for a Variable Climate', in Sivakumar, M. V. K. (ed.), Climate Prediction and Agriculture, Proceedings of the START/WMO International Workshop 27-29 September 1999, Geneva, Switzerland, International START Secretariat, Washington, DC, U.S.A.

IIASA (International Institute for Applied Systems Analysis): 2001, Global Agroecological Assessment for Agriculture in the 21st Century, Fischer, G., Shaw, M., van Velthuizen, H., and Nachtergaele, F. O. (eds.), IIASA Publications, Remaprint, Vienna.

IPCC (Intergovernmental Panel of Climate Change): 2001, 'Climate Change 2001', in McCarthy, J. J., Canziani, O. F., Leary, N. A., Dokken, D. J. and White, K. S. (eds.), Impacts, Adaptation, and Vulnerability, Contribution of Working Group II to the Third Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, pp. 1032.

Janzen, H. H., Desjardins, R. L., Asselin, J. M. R., and Grace, B. (eds.): 1998, The Health of Our Air: Toward Sustainable Agriculture in Canada, Publication 1981/E Research Branch, Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada, pp. 98.

Kulshreshtha, S. N., Junkins, R. L., Desjardins, R. L., and Giraldez, J. C.: 2000, 'A systems approach to estimation of greenhouse gas emissions from the Canadian Agriculture and Agri-Food Sector', World Resour. Rev. 12, 321-337.

Lal, R., Kimble, J. M., Follett, R. F., and Cole, C. V.: 1998, The Potential of U. S. Cropland to Sequester Carbon and Mitigate the Greenhouse Effect, Sleeping Bear Press Inc. pp. 128.

Lyman, F., Mintzer, I., Courrier, K., and Mackenzie, J.: 1990, The Greenhouse Trap: What We Are Doing to the Atmosphere and How We Can Slow Global Warming, Beacon Press, Boston, Massachusetts, pp. 190.

McCracken, M. C., Budyko, M. I., Hecht, A. D., and Izrael, Y. A. (eds.): 1990, Joint US/USSR Commission on Protection of the Environment, Prospects for Future Climate: A Special US/USSR Report on Climate and Climate Changes, Lewis Publishers, Inc., Chelsea, Michigan, pp. 270.

McRae, T., Smith, C. A. S., and Gregorich, L. J. (eds.): 2000, Environmental Sustainability of Canadian Agriculture: Report of the Agri-Environmental Indicator Project, Agriculture and Agri-Food Canada, Ottawa, Canada.

McGinn, S. M., Shepherd, A., and Akinremi, O. O.: 2001, 'Assessment of climate change and impacts on soil moisture and drought on the Prairies', Final Report for Gov't of Canada. Climate Action Fund, Science, Impacts and Adaptation. Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta, Canada, pp. 32.

National Assessment Synthesis Team: 2000, Climate Change Impacts on the United States: The Potential Consequences of Climate Variability and Change, U.S. Global Change Research Program, Cambridge University Press, Cambridge, U.K.

Nicholls, N. and Katz, R. W.: 1991, 'Teleconnections and Their Implications for Long-Range Forecasts', in Glaatz, M. H., Katz, R.W and Nicholls, N., (eds.), Teleconnections Linking Worldwide Climate Anomalies, Cambridge University Press, Great Britain, pp. 535.

Norby, R. J., Wullschleger, S. D., Gunderson, C. A., Johnson, D. W., and Cemlemands, R.: 1999, 'Tree responses to rising CO2 in field experiments: Implications for the future forest', Plant Cell Environ. 22, 683-714.

Ready, K. K., Davidonis, C. U., Johnson, A. S., and Vineyard, B. T.: 1999, 'Temperature regime and carbon dioxide enrichment alter cotton boll development and fiber properties', Agron. J. 91, 851-858.

Rosenberg, N.: 1974, Microclimate: The Biological Environment, Wiley, New York, pp. 315.

Rosenzweig, C. andHillel, D.: 2000, 'Soils and global climate change: Challenges and opportunities', Soil Sci. 165, 47-56.

Rosenzweig, C. and Hillel, D., 1995, 'Potential impacts of climate change on agriculture and food supply.' Consequences 23-32.

Rosenzweig, C., Parry, M. L., Fischer, G., and Frohberg, K.: 1993, Climate Change and World Food Supply, Research Report No. 3, Environmental Change Unit, Oxford University Press, Oxford, U.K.

Saxe, H., Ellsorth, D. S., and Heath, J.: 1998, 'Tree and forest functioning in an enriched CO2 Atmosphere', New Phytologist. 139, 395-436.

Smith, W. N., Desjardins, R. L., and Pattey, E.: 2000, 'The net flux of carbon from agricultural soils in Canada from 1970-2010'. Global Change Biol. 6, 557-568.

U.S. Department of State: 1997, Climate Action Report: Submission of the United States to the United Nations Framework Convention on Climate Change, U.S. Government Printing Office, Washington, D.C.

World Resources: 1992, A Report by the World Resources Institute in Collaboration with UNEP and UNDP, Oxford University Press, Oxford, U.K.

Zhang, X, Vincent, L. A., Hogg, W. D., and Niitsoo, A.: 2000, 'Temperature and precipitation trends in Canada during the 20th century', Atmosphere-Ocean 38(3), 395-429.

Zhang, X., Hogg, W. D., and Mekis, E.: 2001, 'Spatial and temporal characteristics of heavy precipitation events over Canada', J. Climatic 14, 1923-1936.

(Received 15 December 2003; in revised form 14 May 2004)



Department of Geography, The Pennsylvania State University, University Park, PA 16802 U.S.A.

E-mail: [email protected] 2Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC Canada

Abstract. Important findings on the consequences of climate change for agriculture and forestry from the recently completed Third Assessment Report (TAR) of the Intergovernmental Panel on Climate Change (IPCC) are reviewed, with emphasis on new knowledge that emerged since the Second Assessment Report (SAR). The State-Pressure-Response-Adaptation model is used to organize the review. The major findings are:

• Constant or declining food prices are expected for at least the next 25 yr, although food security problems will persist in many developing countries as those countries deal with population increases, political crisis, poor resource endowments, and steady environmental degradation. Most economic model projections suggest that low relative food prices will extend beyond the next 25 yr, although our confidence in these projections erodes farther out into the 21st century.

• Although deforestation rates may have decreased since the early 1990s, degradation with a loss of forest productivity and biomass has occurred at large spatial scales as a result of fragmentation, non-sustainable practices and infrastructure development.

• According to United Nations estimates, approximately 23% of all forest and agricultural lands were classified as degraded over the period since World War II.

• At a worldwide scale, global change pressures (climate change, land-use practices and changes in atmospheric chemistry) are increasingly affecting the supply of goods and services from forests.

• The most realistic experiments to date - free air experiments in an irrigated environment - indicate that C3 agricultural crops in particular respond favorably to gradually increasing atmospheric CO2 concentrations (e.g., wheat yield increases by an average of 28%), although extrapolation of experimental results to real world production where several factors (e.g., nutrients, temperature, precipitation, and others) are likely to be limiting at one time or another remains problematic. Moreover, little is known of crop response to elevated CO2 in the tropics, as most of the research has been conducted in the mid-latitudes.

• Research suggests that for some crops, for example rice, CO2 benefits may decline quickly as temperatures warm beyond optimum photosynthetic levels. However, crop plant growth may benefit relatively more from CO2 enrichment in drought conditions than in wet conditions.

• The unambiguous separation of the relative influences of elevated ambient CO2 levels, climate change responses, and direct human influences (such as present and historical land-use change) on trees at the global and regional scales is still problematic. In some regions such as the temperate and boreal forests, climate change impacts, direct human interventions (including nitrogen-bearing pollution), and the legacy of past human activities (land-use change) appear to be more significant than CO2 fertilization effects. This subject is, however an area of continuing scientific debate, although there does appear to be consensus that any CO2 fertilization effect will saturate (disappear) in the coming century.

• Modeling studies suggest that any warming above current temperatures will diminish crop yields in the tropics while up to 2-3 °C of warming in the mid-latitudes may be tolerated by crops, especially if accompanied by increasing precipitation. The preponderance of developing

Climatic Change (2005) 70: 165-189

© Springer 2005

countries lies in or near the tropics; this finding does not bode well for food production in those countries.

• Where direct human pressures do not mask them, there is increasing evidence of the impacts of climate change on forests associated with changes in natural disturbance regimes, growing season length, and local climatic extremes.

• Recent advances in modeling of vegetation response suggest that transient effects associated with dynamically responding ecosystems to climate change will increasingly dominate over the next century and that during these changes the global forest resource is likely to be adversely affected.

• The ability of livestock producers to adapt their herds to the physiological stress of climate change appears encouraging due to a variety of techniques for dealing with climate stress, but this issue is not well constrained, in part because of the general lack of experimentation and simulations of livestock adaptation to climate change.

• Crop and livestock farmers who have sufficient access to capital and technologies should be able to adapt their farming systems to climate change. Substantial changes in their mix of crops and livestock production may be necessary, however, as considerable costs could be involved in this process because investments in learning and gaining experience with different crops or irrigation.

• Impacts of climate change on agriculture after adaptation are estimated to result in small percentage changes in overall global income. Nations with large resource endowments (i.e., developed countries) will fare better in adapting to climate change than those with poor resource endowments (i.e., developing countries and countries in transition, especially in the tropics and subtropics) which will fare worse. This, in turn, could worsen income disparities between developed and developing countries.

• Although local forest ecosystems will be highly affected, with potentially significant local economic impacts, it is believed that, at regional and global scales, the global supply of timber and non-wood goods and services will adapt through changes in the global market place. However, there will be regional shifts in market share associated with changes in forest productivity with climate change: in contrast to the findings of the SAR, recent studies suggest that the changes will favor producers in developing countries, possibly at the expense of temperate and boreal suppliers.

• Global agricultural vulnerability is assessed by the anticipated effects of climate change on food prices. Based on the accumulated evidence of modeling studies, a global temperature rise of greater than 2.5 °C is likely to reverse the trend of falling real food prices. This would greatly stress food security in many developing countries.

0 0

Post a comment