February 28, 2007
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Published July 1988 through June 1999
FROM VOLUME 5, NUMBER 10, OCTOBER 1992
CLIMATE CHANGE IMPACTS: AGRICULTURE
Two items from Clim. Change, 21(4), Aug. 1992:
"Climate Change in Thailand and Its Potential Impact on Rice Yield,"
D. Bachelet (U.S. EPA-ERL, 200 SW 35th St., Corvallis OR 97333), D. Brown et
Current climatic conditions in Thailand are compared to climate predictions
from four GCMs. Global warming should in principle allow a northward expansion
of rice-growing areas and a lengthening of the growing season now constrained by
low temperatures. The expected increase in water-use efficiency due to enhanced
CO2 might decrease the water deficit vulnerability of dryland rice areas.
"Adaptation of Agriculture to Climate Change," N.J. Rosenberg
(Battelle Pacific Northwest Labs., 901 D St. SW, Washington DC 20024), 385-405.
Because of our incomplete understanding of the processes involved, impact
assessments for agriculture can only be conjectural at this time. However,
guidance is available from an improved understanding of the current climatic
vulnerabilities of agriculture and its resource base, from application of a
realistic range of climate change scenarios to impact assessment, and from
consideration of the complexity of current agricultural systems and the range of
adaptation techniques and policies available now or in the future.
"Sensitivity of Agricultural Drainage Systems to Changes in Climatic
Inputs," A.C. Armstrong (British Waterways, Greycaine Rd., Watford WD2 4JR,
England), Agric. Water Mgmt., 21(1-2), 57-66, June 1992.
Drainage design and the performance of existing pipe systems in the U.K. are
examined in the light of anthropogenic climate change, using a hydrologic model.
Changes in drainage design could be influenced more by structural changes in
agricultural production systems demanding higher performance, than by small
shifts in rainfall totals.
"Climate Models and Predicted Climate Changes in Relation to
Agricultural Production," H. Brunnert (Bundesforsch Anstalt Landwirtschaft,
Braunschweig Volkenrode, Inst. Product & Okotoxicol., Braunschweig, Ger.),
Landbauforschung Volkenrode, 42(2), 65-73, 1992. In German.
Examines the capabilities and flaws of present climate models, then compiles
model predictions of climate factors important for agriculture: mean
temperature, precipitation, and extreme weather events.
"Economic Implications of Global Climate Change for World
Agriculture," J. Tobey (U.S. Econ. Res. Serv., Washington DC 20250), J.
Reilly, S. Kane, J. Agric. Resour. Econ., 17(1), 195-204, July
Model results challenge the hypothesis that negative yield effects in key
temperate grain-producing regions of the world would have a serious impact on
world food production. Country and regional crop yield changes induce
interregional adjustments in production and consumption that serve to buffer
climate change impacts.
"Temperature Effects on Rice at Elevated CO2 Concentration,"
J.T. Baker (Dept. Agron., Univ. Florida, Gainesville FL 32611), L.H. Allen, K.J.
Boote, J. Exper. Bot., 43(252), 959-964, July 1992.
Rice plants were grown season-long in outdoor, naturally sunlit,
controlled-environment plant growth chambers in several temperature regimes.
Results indicate that while increased CO2 levels are likely to be beneficial to
rice growth and yield, potentially large negative effects are possible if air
temperatures also rise.
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