대기 중 블랙카본의 물리화학적 혼합상태가 광흡수 특성에 미치는 영향

초록

Black carbon (BC), a substance formed through incomplete combustion of fossil fuels and biomass burning, significantly contributes to climate change due to its direct radiative forcing. In the atmosphere, BC undergoes aging, reacting with particulate and gaseous substances, which leads to the coating of refractory BC by non-BC materials and alters its physicochemical mixing state, thereby changing its light absorption properties. To accurately assess BC's light absorption, it is crucial to understand both the mass concentration and the coating of BC particles. In this study, we used a Single-Particle Soot Photometer (SP2) and an Aethalometer (AE43) to measure BC's incandescence signal, scattering signal, and absorption coefficient. By analyzing the mass absorption coefficient, we examined how BC particle thickness influences light absorption properties. The findings of this study helps resolve uncertainties in radiative forcing related to BC aging and improve understanding of BC emission characteristics.