1. Université Versailles St-Quentin; UPMC University Paris 06; CNRS/INSU; LATMOS-IPSL; Guyancourt France
2. Department of Applied Environmental Science and Bert Bolin Center for Climate Research; Stockholm University; Stockholm Sweden
3. UPMC University Paris 06; Université Versailles St-Quentin; CNRS/INSU; LATMOS-IPSL; Paris France