[1] CNR, Ist Metodol Anal Ambientale CNR IMAA, Tito, Italy
[2] Barcelona Supercomp Ctr BSC, Barcelona, Spain
[3] World Meteorol Org WMO, Sci & Innovat Dept, Geneva, Switzerland
[4] Univ Paris Est Creteil, F-94010 Creteil, France
[5] Univ Paris Cite, CNRS, LISA, F-94010 Creteil, France
[6] Univ Paris Cite, F-75013 Paris, France
[7] Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France
[8] Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sens, Penteli, Greece
[9] Acad Athens, Res Ctr Atmospher Phys & Climatol, Athens, Greece
[10] NASA Goddard Space Flight Ctr, Earth Sci Div, Greenbelt, MD USA
[11] Catalan Inst Res & Adv Studies ICREA, Barcelona, Spain