Jetse Stoorvogel, Lieven Claessens, John Antle Philip Thornton, Mario Herrero A novel methodology for ex ante assessment of climate change adaptation strategies.

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Presentation transcript:

Jetse Stoorvogel, Lieven Claessens, John Antle Philip Thornton, Mario Herrero A novel methodology for ex ante assessment of climate change adaptation strategies examples from East Africa International conference on crop improvement, ideotyping, and Modelling for African cropping systems under climate change

CIMAC February, 2011 Backgrounds Current farming systems in Eastern Africa Semi-subsistence Close to threshold Climate change Sensitive to climate change Application for Vihiga Kenya Nairobi Vihig a

CIMAC February, 2011 Objectives Assess the impacts of climate change Design a methodology to evaluate adaptation strategies Test this methodology to identify breeding targets

CIMAC February, 2011 Methods Δ Climate Δ ProductionΔ Technologies Δ Management Impacts

CIMAC February, 2011 Tradeoff Analysis Two versions Full model Models management decisions at the field level (including e.g. crop allocation and fertilizer use). Integrates crop growth models, econometric models, and environmental impact models. Data intensive Minimum data model Compares two systems With and without climate change With and without new technologies

CIMAC February, 2011 Tradeoff Analysis - MD Region Sub-region 1 Sub-region 2 Sub-region 3 Activity 1 Activity 2 Activity 3 Yield Cost Price Region Farm type 1 Farm type 2 Farm type 3

CIMAC February, 2011 Climate change in Vihiga 1 model: ECHAM4 (Max Planck) 1 scenario: A1B (Rapid economic growth) Yearly total (rainfall) and averages (temperature)

CIMAC February, 2011 Yield effects of climate change Vihiga district

CIMAC February, 2011 Integrated analysis of climate change Vihiga district Two groups of farmers (with and without livestock) Main activities: maize, beans, napier, livestock, sweet potatoes Analysis comparing situation with and without climate change Evaluate various adaptation strategies

CIMAC February, 2011 Impact of climate change on farming systems

CIMAC February, 2011 Integrated analysis of adaptation strategies Base Improved maize variety Dual purpose sweet potato Dual purpose sweet potato + improved animal breeds

CIMAC February, 2011 Crop varieties and adaptation

CIMAC February, 2011 Drought resistant varieties in Vihiga Farmers negatively impacted Adoption of improved variety

CIMAC February, 2011 Discussion A large percentage of the farms in Vihiga will be negatively impacted by climate change. Introduction of dual purpose sweet potato offsets climate change impacts Uncertainties in climate change projections The MD-TOA approach offers a rapid integrative analysis for exploring options

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