FEEM working papers "Note di lavoro" series
2006 .102

Klum@Gtap: Introducing Biophysical Aspects of Land-Use Decisions Into a General Equilibrium Model A Coupling Experiment


Authors: Kerstin Ronneberger, Maria Berrittella, Francesco Bosello, Richard S.J. Tol
Series: Climate Change and Sustainable Development
Editor: Carlo Carraro
Type: Journal
Keywords: Land-Use Change,Computable General Equilibrium Modeling,Integrated Assessment,Climate Change
JEL n.: C68,Q15
JEL: Environmental Modeling and Assessment
Pages: Vol. 14, No. 2
Date: 04/2009

Abstract

In this paper the global agricultural land use model KLUM is coupled to an extended version of the computable general equilibrium model (CGE) GTAP in order to consistently assess the integrated impacts of climate change on global cropland allocation and its implication for economic development. The methodology is innovative as it introduces dynamic economic land-use decisions based also on the biophysical aspects of land into a state-of-the-art CGE; it further allows the projection of resulting changes in cropland patterns on a spatially more explicit level. A convergence test and illustrative future simulations underpin the robustness and potentials of the coupled system. Reference simulations with the uncoupled models emphasize the impact and relevance of the coupling; the results of coupled and uncoupled simulations can differ by several hundred percent.

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