Abstract
East Asia is one of the most developing regions and thus aerosol emissions are increasing. We measured aerosols at Fukue Island to understand the chemical composition of aerosol in East China Sea. An instrument we deployed was an Aerosol Mass Spectrometer (AMS) produced by Aerodyne Research Inc. The non-refractory chemical components of the PM1.0 aerosols are analyzed by a quadrupole mass spectrometer. Sulfate and organics were the dominant species. Time-of-Flight analysis shows that the size distributions of organics were similar to that of sulfate for the long-range transportation. This suggests that aerosols are internally mixed. The ratio of sulfate to organics was high when the air came from Chinese continent, while it was low when the air came from either Korea or Japan. Case studies suggest that organics are internally mixed with sulfate when it is oxygenated.
