Absorbing aerosols at high relative humidity: linking hygroscopic growth to optical properties
One of the major uncertainties in the understanding of Earth's climate system is the interaction between solar radiation and aerosols in the atmsphere. Aerosols exposed to high humidity will change their chemical, physical, and optical properties due to their increased water content. To model hydrated aerosols, atmospheric chemistry and climate models often use the volume weighted mixing rule to predict the complex refractive index (RI) of aerosols when they interact with high relative humidiy , and , in general assume homogenous mixing. This study explores the validity of these assumptions.