Agriculture Reference
In-Depth Information
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centers to produce regional forecasts for seasonal precipitation. These fore-
casts are disseminated to national meteorological services and other con-
cerned agencies in the subregion.
Conclusions
D rought is endemic to southern Africa. Sustainable livelihoods across the
su bregion depend to a large extent on how well the subregion's economies
ca n absorb the multiple stresses that arise from drought. The goal of sus-
ta inable livelihoods under a highly variable climatic regime can only be at-
ta ined through environmental monitoring supported by a well-structured
re search strategy. A number of gray areas exist that limit drought mit-
ig ation strategies in southern Africa. Little is known about the physical
m echanisms that trigger, prolong, and end drought episodes. Currently, no
ob jective and scientifically sound thresholds and guidelines have been de-
fin ed to provide effective drought early warning conditions beyond which
na ture and society cannot cope without intervention. The interface between
op erational drought monitoring and users of the information is currently
ei ther poorly defined or nonexistent. Research to define how operational
dr ought monitoring systems can be better integrated to provide more useful
gu idance to socioeconomic activities at national level is therefore crucial.
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Re ferences
Br uwer, J.J. 1990. Drought policy in the Republic of South Africa. In: Proceed-
ings of the SARCCUS Workshop on Drought, June 1989, Pretoria. Southern
African Regional Commission for Conservation and Utilization of the Soil,
Pretoria, South Africa.
Ca ne, M.A., G. Eshel, and R.W. Buckland. 1994. Forecasting Zimbabwe maize
yield using eastern equatorial Pacific sea surface temperature. Nature 370:204-
205.
Du Pisani, A.L. 1990. Drought detection, monitoring and early warning. In: Pro-
ceedings of the SARCCUS Workshop on Drought, June 1989, Pretoria. South-
ern African Regional Commission for Conservation and Utilization of the Soil,
Pretoria, South Africa.
Fr anklin, M. 1998. Seasonal climate forecasting and stockmarket in Zimbabwe.
In: Proceedings of the Post Season National Climate Stakeholders Seminar, 29
April 1998. Department of Meteorological Services, Harare, Zimbabwe, p. 28.
H eisey, P.W., and G.O. Edmeades. 1999. Maize production in drought-stressed en-
vironments: technical options and research resource allocation. International
Maize and Wheat Improvement Center Technical Report, Mexico City.
IF PRI. 1998. How will agriculture weather El Ni no? In: Views and News, A 2020
Vision for Food, Agriculture and the Environment. International Food Policy
Research Institute, Washington, DC.
Kogan, F.N. 1995. Application of vegetation index and brightness temperature for
drought detection. Adv. Space Res. 15:91-100.
Lockwood, J.G. 1979. The Causes of Climate. John Wiley and Sons, New York.
[274
 
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