Abstract
We assessed the sensitivity of simulated mass scattering cross sections (\(\alpha ^{sca}_{\lambda }\) [m\(^{2}\)/g]) of three aerosol species to different particle microphysical properties and derived constraints on these microphysical properties for the north-western Mediterranean basin, by means of a comparison between code calculations and observations. In particular, we calculated \(\alpha ^{sca}_{\lambda }\) of mineral dust, organic carbon and sulfate at three wavelengths in the visible range with a T-matrix optical code, considering \({\pm }20\%\) perturbations on size distribution, refractive index and mass density, and oblate/prolate spheroids with two different axial ratios as shape perturbations. Then, we compared the simulation results with a set of observed \(\alpha ^{sca}_{\lambda }\) of mineral dust, aged organics and ammonium sulfate sources provided by the IDAEA-CSIC of Barcelona (Spain) and representative of the north-western Mediterranean basin.
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