Modeling aerosol composition at Cheju Island, Korea

Thirty-two months of aerosol chemical composition measured at Cheju Island, Korea, are analyzed with a gas-aerosol equilibrium model. The aerosol composition is divided into the fine and coarse sections, with each section assumed to be in equilibrium with the gas phase, which was supported by the calculations. The particulate ammonium is found to exists in the fine section to neutralize nss-sulfate, and the particulate nitrate and chloride is present in the coarse section and competes with each other to share sodium, potassium, calcium, and magnesium.