[1] Univ Complutense Madrid, Dept Geofis & Meteorol, Fac Fis, E-28040 Madrid, Spain
[2] Univ Paris 06, CNRS, LOCEAN, IPSL, Paris, France
[3] Univ Seville, Seville, Spain
[4] Bjerknes Ctr Climate Res, Bergen, Norway
[5] CERFAX, Toulouse, France
[6] Meteo France, CNRS, GAME, CNRM, Toulouse, France
[7] Univ Bourgogne, Ctr Rech Climatol, Dijon, France
[8] ENEA, Rome, Italy