Optical Properties of Black Carbon Aerosols with Different Coating Models

Research on the optical properties of black carbon (BC) aerosols is highly important for investigating global climate change. A general inhomogeneous particle superposition model developed. Inhomogeneous particles with arbitrary shapes can be constructed by this model. BC core-shell, spherical, ellipsoid, and irregular coating models are established to explore impact shape their properties. The studied employing discrete dipole approximation method (DDA). influences morphology aerosols, volume fractions, coatings analyzed. causes a higher forward scattering intensity lower extinction cross-section. core-shell than other models. effect becomes smaller as fractal dimension increase. Consequently, assuming spherical considered in most studies leads inaccuracy aerosols. It necessary comprehensively consider effects aerosol