Climatic Change

, Volume 56, Issue 1, pp 119–137

Climate System Modeling in the Framework of the Tolerable Windows Approach: The ICLIPS Climate Model


  • Thomas Bruckner
    • Institute for Energy EngineeringTechnical University of Berlin
  • Georg Hooss
    • Max Planck Institute for Meteorology
  • Hans-Martin Füssel
    • Potsdam Institute for Climate Impact Research, Telegrafenberg
  • Klaus Hasselmann
    • Max Planck Institute for Meteorology

DOI: 10.1023/A:1021300924356

Cite this article as:
Bruckner, T., Hooss, G., Füssel, H. et al. Climatic Change (2003) 56: 119. doi:10.1023/A:1021300924356


The computational burden associated with applications of theTolerable Windows Approach (TWA) considerably exceeds that oftraditional integrated assessments of global climate change. Aspart of the ICLIPS (Integrated Assessment of Climate ProtectionStrategies) project, a computationally efficient climate model hasbeen developed that can be included in integrated assessmentmodels of any kind. The ICLIPS climate model (ICM) is implementedin GAMS. It is driven by anthropogenic emissions of CO2,CH4, N2O, halocarbons, SF6, andSO2. Theoutput includes transient patterns of near-surface airtemperature, total column-integrated cloud cover fraction,precipitation, humidity, and global mean sea-level rise. Thecarbon cycle module explicitly treats the nonlinear sea watercarbon chemistry and the nonlinear CO2 fertilized biosphereuptake. Patterns of the impact-relevant climate variables arederived form empirical orthogonal function (EOF) analysis andscaled by the principal component of temperature change. Theevolution of the latter is derived from a box-model-typedifferential analogue to its impulse response function convolutionintegral. We present a description of the ICM components and someresults to demonstrate the model's applicability in the TWA setting.

Copyright information

© Kluwer Academic Publishers 2003