I am indebted to Suki Manabe without whose time, help, and encouragement this work could not have been completed. He made the results of the already existing CLI-SST experiment with the same model available to me and helped in extending the OBS-SST run for the latest 5 yr. He also got the new CSST-SM run conducted for this study. A number of insightful discussions with him helped me design the experiments. His careful reading of an earlier version of the manuscript and the detailed suggestions made by him led to a much improved manuscript. I am thankful to Dick Wetherald, Mike Spellmann, Gabriel Lau, and Steve Griffies for many useful discussions. I also thank Mike Fennessy and Sumant Nigam for suggestions on an earlier version of the manuscript. I am also grateful to Kirk Bryan, Jerry Mahlman, and George Philander for their warm hospitality. Constructive comments by two anonymous reviewers helped to improve the revised manuscript. I would also like to thank K. Rajendran, H. Annamalai, and N. H. Saji for various help in analyzing the output of the model.
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