Acknowledgements

ASCOS was supported by the Swedish Polar Research Secretariat, Swedish Research Council, the UK National Environmental Research Council and National Center for Atmospheric Research, the US National Science Foundation and National Oceanic and Atmospheric Administration, Knut and Alice Wallenberg foundation, the European Union 6th Framework program DAMOCLES, the Bolin Center for Climate research, the Finnish Meteorological Institute, Academy of Science, Letters/Vilho, Yrjö and Kalle Väisälä Foundation and the Lapland regional fund/Nordenskiöld stipend, the Bjerknes Center for Climate Research, the German Research Foundation and the Canadian Natural Sciences and Engineering Research Council. Special thanks are due to Oden’s Captain Mattias Peterson and his crew for invaluable assistance.