Characterizing SO2 flux emissions and plume patterns of major point sources in South Korea via airborne measurements

We will present observational results of an aircraft measurement campaign to characterize air pollution in South Korea, we measured SO 2 by deploying the chemical ionization quadrupole mass spectrometer (CIMS-QMS) on the Hanseo University research aircraft. The flights flew in spirals from 1000-3500 ft (~300-1000m) in altitude to capture the plume patterns of five major point sources: Hyundai Steel Mill, Dangjin Power plant, Daesan Petrochemical Facility, Taean Power plant, and Boryung Power plant. Meteorological data is collected with the ARMMS-30 (Aircraft Integrated Meteorological Measurement System). The SO 2 plumes are visualized using Google Earth to observe the patterns with respect to meteorological factors. The Gaussian dispersion plume model is used for top-down estimations of SO 2 emissions from each point source and compared to the reported emission inventories of each site. We also estimate SO 2 flux using the eddy covariance method to complement and compare the estimation from the plume model analysis.