Thirty Years Activities on Aerosol, Acid Fog, Acid Rain, Ammonia and Trans-boundary Air Pollution Research

Abstract

Aerosol, acid fog, acid rain, ammonia and trans-boundary air pollution research conducted were reviewed. Sulfate and nitrate concentrations over Tokyo Metropolitan area are obtained with 5 min sampling time of air upon introduction of tape air sampler and ion-chromatography. Acid fog survey was started in Mt. Akagi which is located the downstream of Tokyo metropolitan area. The development of low pH and high concentration of nitrate fog was clarified. Collaboration of air pollutant observation, long range transport model and emission inventory is essential to tackle the trans-boundary air pollution issue. We conducted collaborative research work on trans-boundary air pollution. Extremely low pH acid rain produced by the big eruption of Miyake-jima island was observed by the automatic acid rain collection and ion-chromatographic analysis system. Gridded emission inventory of ammonia for Japan and the Republic of Korea was compiled. Wide area distribution of ammonia in the air is in advance.