[1] Ist Nazl Geofis & Vulcanol, Rome, Italy
[2] Univ Calif Irvine, Dept Chem, Irvine, CA 92717 USA
[3] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA
[4] Hohai Univ, Coll Hydrol & Water Resources, Nanjing, Peoples R China
[5] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
[6] Stiftung Alfred Wegener Inst, Bremerhaven, Germany
[7] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia
[8] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[9] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA
[10] Catholic Univ Louvain, Louvain La Neuve, Belgium
[11] Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
[12] Rutgers State Univ, New Brunswick, NJ USA