ENSEMBLES: A new multi-model ensemble for seasonal-to-annual predictions-Skill and progress beyond DEMETER in forecasting tropical Pacific SSTs - Weisheimer, A; Doblas-Reyes, F; Palmer, T; Alessandri, A; Arribas, A; Deque, M; Keenlyside, N; MacVean, M; Navarra, A; Rogel, P (GEOPHYSICAL RESEARCH LETTERS, 2009)