How accurately can the instantaneous aerosol effect on cloud albedo be constrained?

Edward Gryspeerdt1, Johannes Quaas2, Sylvaine Ferrachat3, Andrew Gettelman4, Steven Ghan5, Ulrike Lohmann3, David Neubauer3, Hugh Morrison4, Dan Partridge6, Philip Stier7, Toshihiko Takemura8, Hailong Wang5, Minghuai Wang9 and Kai Zhang5, (1)Imperial College London, Space and Atmospheric Physics Group, London, United Kingdom, (2)University of Leipzig, Leipzig, Germany, (3)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (4)NCAR, Boulder, CO, United States, (5)Pacific Northwest National Laboratory, Richland, WA, United States, (6)University of Exeter, Department of Mathematics, Exeter, United Kingdom, (7)University of Oxford, Department of Physics, Oxford, United Kingdom, (8)Kyushu University, Fukuoka, Japan, (9)Nanjing University, Nanjing, China