Uncertaintines in modelling contribution of water to aerosol direct effect

Harri Kokkola1, Tomi Laaksoviita1, Sami Romakkaniemi1, Alf Kirkevag2, Thomas Kühn3, Antti T Arola1 and Juha Tonttila4, (1)Atmospheric Research Centre of Eastern Finland, Kuopio, Finland, (2)Norwegian Meteorological Institute, Section for Climate Modelling and Air Pollution, Oslo, Norway, (3)University of Eastern Finland, Applied Physics, Kuopio, Finland, (4)Finnish Meteorological Institute, Atmospheric Research Centre of Eastern Finland, Kuopio, Finland