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Climate Dynamics

, Volume 14, Issue 4, pp 249–266 | Cite as

Periodically synchronously coupled integrations with the atmosphere-ocean general circulation model ECHAM3/LSG

  • R. Voss
  • R. Sausen
  • U. Cubasch

Abstract

 A new periodically synchronous coupling scheme has been applied to an atmosphere-ocean general circulation model. Due to a temporary switching off of the atmospheric model this scheme can considerably reduce computer requirements of coupled model experiments. In order to evaluate the new coupling scheme the model results are compared to corresponding synchronously coupled integrations. Experiments with fixed present-day CO2 concentration and a gradual increase of CO2 show a good reproduction of the mean state and the climate-change pattern, respectively. The deviations from the synchronously coupled experiments are in the range of the variability of the corresponding synchronously coupled runs. Due to the forcing during the ocean-only periods the short-term fluctuations are underestimated and the long-term variability is overestimated.

Keywords

Model Experiment Gradual Increase Couple Model Circulation Model General Circulation Model 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • R. Voss
    • 1
  • R. Sausen
    • 2
  • U. Cubasch
    • 1
  1. 1.Deutsches Klimarechenzentrum, Bundesstr. 55, D-20146 Hamburg, Germany E-mail: reinhard.voss@dkrz.deDE
  2. 2.Institut für Physik der Atmosphäre, DLR Oberpfaffenhofen, D-82234 Weßling, GermanyDE

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