Extinction measurements and single scattering albedo in the 0.5 to 1.05 μm range for a laboratory cloud of hexagonal ice crystals

Measurements are presented of the extinction coefficients for two laboratory-generated clouds of ice crystals, each with different size distributions and concentrations. The shape of the extinction curve for both clouds, over the wavelength range of 0.5–1.05 μm, is similar to that of the absorption curve for bulk ice. This data has been used to determine the single scattering albedo over the same wavelength range and it is found that the results are significantly different to the generally accepted values.