Economywide impacts of climate change on agriculture in Sub-Saharan Africa

Alvaro Calzadilla (), Tingju Zhu (), Katrin Rehdanz, Richard Tol and Claudia Ringler

Ecological Economics, 2013, vol. 93, issue C, 150-165

Abstract: Two possible adaptation scenarios to climate change for Sub-Saharan Africa are analyzed under the SRES B2 scenario. The first scenario doubles the irrigated area in Sub-Saharan Africa by 2050, compared to the baseline, but keeps total crop area constant. The second scenario increases both rainfed and irrigated crop yields by 25% for all Sub-Saharan African countries. The two adaptation scenarios are analyzed with IMPACT, a partial equilibrium agricultural sector model combined with a water simulation module, and with GTAP-W, a general equilibrium model including water resources. The methodology combines the advantages of a partial equilibrium approach, which considers detailed water-agriculture linkages, with a general equilibrium approach, which takes into account linkages between agriculture and nonagricultural sectors and includes a full treatment of factor markets. The efficacy of the two scenarios as adaptation measures to cope with climate change is discussed. Due to the limited initial irrigated area in the region, an increase in agricultural productivity achieves better outcomes than an expansion of irrigated area. Even though Sub-Saharan Africa is not a key contributor to global food production (rainfed, irrigated or total), both scenarios help lower world food prices, stimulating national and international food markets.

Keywords: Computable general equilibrium; Climate change; Agriculture; Sub-Saharan Africa (search for similar items in EconPapers)
JEL-codes: D58 N57 Q17 Q54 (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (33)

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Related works:
Working Paper: Economy-Wide Impacts of Climate Change on Agriculture in Sub-Saharan Africa (2009)
Working Paper: Economywide impacts of climate change on agriculture in Sub-Saharan Africa (2009)
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecolec:v:93:y:2013:i:c:p:150-165

DOI: 10.1016/j.ecolecon.2013.05.006

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