Suzana J Camargo¹, Chia-Ying Lee¹, Frederic Vitart², Adam H Sobel^3,4, Michael Tippett³, Shuguang Wang³ and Joanne Camp⁵, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)ECMWF, Reading, United Kingdom, (3)Columbia University, Department of Applied Physics and Applied Mathematics, New York, NY, United States, (4)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (5)UK Met Office, Exeter, United Kingdom