„ ATMOSPHERIC CHEMISTRY MODELING GROUP

 Aerosols undergo a phase transition between solid and liquid states as a function of relative humidity. Changes in aerosol phase state affect its size, leading to changes in optical properties, radiative effects, and heterogeneous reactions. However, state-of-the-art chemical transport models have not simulated aerosol phases with respect to relative humidity history.

 We focus on updating the phase state of aerosol within the chemical transport model and validate aerosol phase state with measurements of aerosol phase and concentration. By incorporating aerosol phase state, we aim to quantify the change in optical properties of aerosol and reassess its impact on climate. We look forward to improve our understanding of aerosol-climate interaction as well as reduce the uncertainties in current models.

  To come up with effective measures to reduce and manage PM in Korea, it is necessary to not only manage the local pollutant but also scientifically identify the effects of inflow from abroad, and research on the pollutants themselves must be conducted.

  In this research, the air quality observations of Korea and China are collected through complementary joint research to identify the pollution characteristics, chemical reaction process and transport characteristics in the atmosphere of PM2.5 in gas and particulate phase. Through this, Korea and China derive measures to improve the performance of air quality forecasting models and identify the causes of air pollution in East Asia. 

  Among them, we are responsible for chemical mechanism sensitivity experiments through multi-model inter-comparison and VOC scheme improvement experiments and applications related to organic aerosol production.