Bierwirth, E., Ehrlich, A., Wendisch M., Gayet, J.-F., Gourbeyre, C., Dupuy, R., Herber, A., Neuber, R. and Lampert, A.: Optical thickness and effective radius of Arctic boundary–layer clouds retrieved from airborne nadir and imaging spectrometry. Atmos. Meas. Tech., 6, 1189-1200, doi: 10.5194/amt-6-1189-2013, 2013.