Source-Based Size-Resolved Optical Properties of Carbonaceous Aerosols

In this study, the source-based optical properties of polydisperse carbonaceous aerosols were determined from PM2.5 concentrations measured at a Global Atmospheric Watch station in South Korea. The extinction and absorption coefficients calculated using Mie theory assuming lognormal size distribution. Based on mass concentration EPA’s Positive Matrix Factorization (PMF) receptor model, which considers five source identification apportionment factors (biogenic source, local biomass burning, secondary organic aerosol, transported mixed sources), size-resolved efficiencies estimated for each multilinear regression model. results show that depend aerosol physicochemical characteristics chemical compounds. long-range transport burning (LBB) has 20%, holds 12.1–23.1% total efficiency—depending refractive index—in range 0.1–0.5 μm geometric mean diameter humic-like substances (HULIS) imaginary index 0.006–0.3. Biogenic sources with small diameters have higher (MAE) than other sources, depending index.