Gayet, J.-F., Mioche, G., Dörnbrack, A., Ehrlich, A., Lampert, A., and Wendisch, M.: Microphysical and optical properties of Arctic mixed–phase clouds. The 9 April 2007 case study, Atmos. Chem. Phys., 9, 6581–6595, www.atmos-chem-phys.net/9/6581/2009/, 2009.