We thank several anonymous reviewers for their helpful and perceptive suggestions. The workshop that formed the basis for this paper was funded by the U.K. Natural Environment Research Council (NERC Grant NE/I006672/1). We thank Eleanor Blyth and David Parker for comments. Robin Chadwick, Kate Willett, William Ingram, Lizzie Kendon, and Peter Stott were supported by the Joint DECC/Defra Met Office Hadley Centre Climate Programme (GA01101). Paul Durack is supported by the Lawrence Livermore National Laboratory that is funded by the U.S. Department of Energy under Contract DE-AC52-07NA27344, and William Ingram is partly supported by NERC Grant NE/I00680X/1. Gabi Hegerl and Richard Allan are partly supported by NCAS. Kevin Trenberth is supported by NASA Grant NNX11AG69G. P. L. Vidale, R. P. Allan, B. Balan Sarojini, C. Liu, E. Black, P. Stott, G. Hegerl, D. Polson, R. Marsh, N. Skliris, and Laura Wilcox are supported by the PAGODA project of the Changing Water Cycle programme of NERC under Grant NE/I006672/1. G. Hegerl and D. Polson are supported by the ERC Grant EC320691. A. Dai acknowledges the support of NSF Grant AGS-1353740. H. J. Fowler and G. Hegerl are funded by the Wolfson Foundation and the Royal Society as Royal Society Wolfson Research Merit Award (WM140025 and WM130060, respectively) holders. G. Hegerl is further supported by the European Research Council (TITAN, ERC-2012-AdG 320691). H. J. Fowler is supported by the CONVEX project of the Changing Water Cycle programme of NERC under Grant NE/I006680/1 and European Research Council funded INTENSE (ERC-2013-CoG).
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