The authors are grateful to Prof. L. Bengtsson for the stimulating cooperation in the joint MPI–ETHZ project and for the possibility given to the first author to frequently visit the MPI. Thanks to Drs. M. Beniston and M. Rotach for reviewing the manuscripts and their valuable comments. We thank Jan Perlwitz from MPI for providing the SST and sea ice data. P. Tschucks’ efforts in the T106 data processing are highly acknowledged. The Swiss Scientific Computing Center CSCS generously provided the computer resources, which allowed climatic change simulations of unprecedented high resolution. U. Schlese, M. Esch, and Dr. A. Bernasconi installed the ECHAM3 model at CSCS and supported the T106 experiments. The present work was supported by the following Swiss National Science Foundation Grants: National Research Program 31, Climate Change and Natural Hazards (Grant 4031- 033250); Swiss Priority Program for the Environment (SPP, Grant 5001-35179); ETH Grant 020-043-95; and EU Grants EV5V-CT92-0123 and ENV4-CT95-0102.
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