The coupling of optimal economic growth and climate dynamics

  • Olivier Bahn
  • Laurent Drouet
  • Neil R. Edwards
  • Alain Haurie
  • Reto Knutti
  • Socrates Kypreos
  • Thomas F. Stocker
  • Jean-Philippe Vial


In this paper, we study optimal economic growth programs coupled with climate change dynamics. The study is based on models derived from MERGE, a well established integrated assessment model (IAM). We discuss first the introduction in MERGE of a set of “tolerable window” constraints which limit both the temperature change and the rate of temperature change. These constraints, obtained from ensemble simulations performed with the Bern 2.5-D climate model, allow us to identity a domain intended to preserve the Atlantic thermohaline circulation. Next, we report on experiments where a two-way coupling is realized between the economic module of MERGE and an intermediate complexity “3-D-” climate model (C-GOLDSTEIN) which computes the changes in climate and mean temperature. The coupling is achieved through the implementation of an advanced “oracle based optimization technique” which permits the integration of information coming from the climate model during the search for the optimal economic growth path. Both cost-effectiveness and cost-benefit analysis modes are explored with this combined “meta-model” which we refer to as GOLDMERGE. Some perspectives on future implementations of these approaches in the context of “collaborative” or “community” integrated assessment modules are derived from the comparison of the different approaches.


Climate Policy Climate Sensitivity Query Point Integrate Assessment Model Stochastic Programming Approach 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Olivier Bahn
    • 1
  • Laurent Drouet
    • 2
  • Neil R. Edwards
    • 3
  • Alain Haurie
    • 2
  • Reto Knutti
    • 4
  • Socrates Kypreos
    • 5
  • Thomas F. Stocker
    • 6
  • Jean-Philippe Vial
    • 2
  1. 1.GERAD and MQGHEC MontréalMontréalCanada
  2. 2.LOGILAB-HECUniversity of GenevaGenevaSwitzerland
  3. 3.Earth Sciences, CEPSAROpen UniversityMilton KeynesUK
  4. 4.National Center for Atmospheric ResearchBoulderUSA
  5. 5.Paul Scherrer InstituteVilligenSwitzerland
  6. 6.Climate and Environmental Physics, Physics InstituteUniversity of BernBernSwitzerland

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