Development of a European multimodel ensemble system for seasonal-to-interannual prediction (DEMETER) by Palmer, T, Alessandri, A, Andersen, U, Cantelaube, P, Davey, M, Delecluse, P, Deque, M, Diez, E, Doblas-Reyes, F, Feddersen, H, Graham, R, Gualdi, S, Gueremy, J, Hagedorn, R, Hoshen, M, Keenlyside, N, Latif, M, Lazar, A, Maisonnave, E, Marletto, V, Morse, A, Orfila, B, Rogel, P, Terres, J, Thomson, M