Patricia de Rosnay, ECMWF, Reading, Berkshire, United Kingdom; and C. Albergel, G. Balsamo, S. Boussetta, J. C. Calvet, C. Gruhier, S. Hasenauer, L. Isaksen, Y. Kerr, J. Muñoz Sabater, T. Pellarin, and W. Wagner