Analysis of Aerosol Characteristics through Stereoscopic Observation of the West Sea during the 2019 YES-AQ Campaign

We analyzed the characteristics of aerosol inflow event observed during May 21 similar to 22, 2019 through the Yellow Sea-Air Quality (YES-AQ) observation campaign. Aerosol plumes were observed between Shandong Peninsula and Gyeonggi Bay on May 21, 2019 through the Geostationary Korean Operational Multi-Purpose SATellite-2A (GK-2A) imagery. Based on the NARA aircraft observations, the fine particle increased when passing the aerosol plume at an altitude of 1.5 km. Also, aerosol light scattering and absorption coefficients increased to 110.3 Mm(-1) and 6.3 Mm(-1), respectively. For the case of May 22, two different aerosol plumes were observed on the GK-2A satellite imagery. When NARA aircraft passing the north plume at an altitude of 1.5 km, the light scattering coefficient increased to 89.9 Mm(-1) and the light absorption coefficient increased to 4.0 Mm(-1). The light scattering coefficient at an altitude of 500 m when passing the south plume 98.2 Mm(-1), similar to that of the north plume, while the light absorption coefficient was 8.0 Mm(-1). As a result of backward trajectory analysis, it was analyzed that the origin and movement path of the north plume and the south plume flowed into Korea through the Yellow Sea were different. In particular, it is presumed that the south plume contained a lot of anthropogenic absorbing aerosols, as it passed over the areas at lower altitudes for a longer time compared to that of the north plume.