We thank R. Caballero, R. T. Pierrehumbert, and G. Walin for comments and discussions. We also thank two anonymous reviewers for their insightful comments and suggestions, which improved the presentation. The work reported here was supported by the Swedish Research Council and is a contribution from the Bert Bolin Climate Research Centre at Stockholm University. We acknowledge the modeling groups, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) and the WCRP’s Working Group on Coupled Modelling (WGCM) for their roles in making the WCRP CMIP3 multimodel dataset available. Support of this dataset is provided by the Office of Science, U.S. Department of Energy.
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