We thank two anonymous referees and Dr. William J. Gutowski Jr. for their useful comments. We also acknowledge the modeling groups for making their simulations available for analysis, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) for collecting and archiving the CMIP3 model output, and the WCRP’s Working Group on Coupled Modelling (WGCM) for organizing the model data analysis activity. The WCRP CMIP3 multimodel dataset is supported by the Office of Science of the U.S. Department of Energy. This work is supported by the NOAA CPO Grant GC06-038.
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