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G. P. Weedon, S. Gomes, P. Viterbo, W. J. Shuttleworth, E. Blyth, H. Österle, J. C. Adam, N. Bellouin, O. Boucher, and M. Best

responsible for an observed drop in pan evaporation, although decreases–increases in radiation (global dimming–brightening) are perhaps responsible for changes elsewhere. Shuttleworth et al. (2009) demonstrated that it is not always possible to use pan evaporation to diagnose large-scale change in external drivers of actual evaporation. This is because some changes in the drivers of pan evaporation are caused by feedbacks in the atmospheric planetary boundary layer caused by altered actual evaporation

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Philippe Lucas-Picher, Jens H. Christensen, Fahad Saeed, Pankaj Kumar, Shakeel Asharaf, Bodo Ahrens, Andrew J. Wiltshire, Daniela Jacob, and Stefan Hagemann

reanalysis driving field. The four models are shortly described in Table 1 . The four RCMs used in this study are developed in Europe and they are adjusted for the midlatitude’s atmospheric dynamics. Although a RCM domain is portable around the globe, South Asia remains a nonnative domain for those RCMs where their parameterizations, including particularly their convection schemes, are not adapted to the tropical climate. In their study, using the RCM CLM with the same configuration over seven domains

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Pete Falloon, Richard Betts, Andrew Wiltshire, Rutger Dankers, Camilla Mathison, Doug McNeall, Paul Bates, and Mark Trigg

processes, gravity wave drag, microphysics, and sea ice schemes, plus major changes to convection, land surface, and cloud schemes, and inclusion of aerosols; a detailed comparison of the two models is given by Martin et al. (2006) and Johns et al. (2006) . Compared to HadCM3, the developments to HadGEM1 have led to a substantial improvement in the processes represented, including the hydrological cycle, particularly for oceanic surface freshwater fluxes ( Rodriguez et al. 2010 ). The hydrological

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