Composition and Characteristics of Ionic Components of Aerosols Collected at Gosan Site in Jeju Island, Korea

Abstract

The total of 1,454 aerosol samples were collected by high volume tape sampler at the Gosan Site in Jeju Island from 1992 to 1999, and the major water-soluble ionic components were chemically analyzed. The mean concentrations of nss-SO4 2-, NH4±, and NO3 - showed high values, which were 6.73, 1.45, and 1.45 μg/m3, respectively, while Ca2± and K± concentrations were low with the values of 0.49 and 0.42 μg/m3. The concentrations of most components increased in spring but decreased in summer, especially with the remarkable increase of Ca2± and NO3 - concentrations in spring. The seasonal comparison of nss-SO4 2- concentrations showed higher values with the order of spring¤fall¤winter¤summer, but spring¤winter¤fall¤summer for NO3 -. Meanwhile, the concentration levels of Na± and Cl- increased more in winter season. According to the investigation of wind direction effect, the concentrations of most aerosol ionic components showed higher values consistently at the westerly and northerly wind conditions. Based on the factor analysis, the atmospheric aerosols in the Gosan Site are considered to be largely affected by marine sources, followed by anthropogenic and soil sources.