Gokhan Danabasoglu¹, Frederic S Castruccio², Burcu Boza³, Alice Barthel⁴, Arne Biastoch⁵, Adam Tobias Blaker⁶, Alexandra Bozec⁷, Diego Bruciaferri⁸, Frank Bryan⁹, Eric Chassignet⁷, Yao Fu¹⁰, Ian Grooms¹¹, Catherine Guiavarc'h¹², Hakase Hayashida¹³, Andrew M Hogg¹⁴, Ryan Holmes¹⁵, Doroteaciro Iovino¹⁶, Andrew E Kiss¹⁷, Susan Lozier¹⁸, Gustavo M Marques¹⁹, Alex Megann²⁰, Filipe S Pereira⁴, Franziska U. Schwarzkopf⁵, David Storkey¹², Luke P Van Roekel⁴, Jonathan D Wolfe⁴, Xiaobiao Xu²¹ and Rong Zhang²², (1)NSF National Center for Atmospheric Research, Boulder, CO, United States, (2)NSF National Center for Atmospheric Research, Boulder, United States, (3)Istanbul Technical University, Eurasia Institute of Earth Sciences, Istanbul, Turkey, (4)Los Alamos National Laboratory, Los Alamos, United States, (5)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (6)National Oceanography Centre, Marine Systems Modelling, Southampton, United Kingdom, (7)Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL, United States, (8)Plymouth University, Faculty of Science and Engineering, Plymouth, United Kingdom, (9)National Center for Atmospheric Research, Climate and Global Dynamics, Boulder, United States, (10)University of South Florida, Tampa, United States, (11)University of Colorado at Boulder, Applied Mathematics, Boulder, United States, (12)Met Office Hadley center for Climate Change, Exeter, United Kingdom, (13)Japan Agency for Marine–Earth Science and Technology, Yokosuka, Japan, (14)Australian National University and ARC Centre of Excellence for Climate Extremes, ACCESS-NRI, Canberra, ACT, Australia, (15)Bureau of Meteorology, Sydney, Australia, (16)Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici - CMCC, Bologna, Italy, (17)Australian National University, Canberra, ACT, Australia, (18)Duke University, Durham, United States, (19)University of Miami, Miami, United States, (20)National Oceanography Centre, Southampton, United Kingdom, (21)Florida State University, Center for Ocean-Atmospheric Prediction Studies, Tallahassee, FL, United States, (22)Princeton University, Program in Atmospheric and Oceanic Sciences, Princeton, United States