ENSO diversity in observations, by Jin-Yi Yu and Benjamin S. Giese; ENSO diversity in the paleo record, by Kim M. Cobb and Julien Emile-Geay; ENSO diversity in climate models, by Antonietta Capotondi and Andrew Wittenberg; Extra-tropical precursors of ENSO flavors, by Emanuele Di Lorenzo, Honghai Zhang, Amy Clement, Bruce Anderson, and Alexey Federov; The diversity of El Nino in the North American Multi-Model Prediction System, by Ben Kirtman, Johnna M. Infanti, and Sarah M. Larson; Teleconnection and impacts of ENSO diversity, by Tong Lee; The NOAA MAPP Climate Prediction Task Force, by Vasu Misra