[1] GKSS Forschungszentrum Geesthacht GmbH, Inst Coastal Res Phys & Chem Anal, D-21502 Geesthacht, Germany
[2] Univ Jena, Dept Environm Anal, Inst Inorgan & Analyt Chem, D-07743 Jena, Germany
[3] Alfred Wegener Inst Polar & Marine Res, D-27568 Bremerhaven, Germany
[4] Univ Bremen, Inst Environm Phys, D-28359 Bremen, Germany
[5] Meteorol Serv Canada, Toronto, ON M3H 5T4, Canada