Measurements of Aerosol Number Concentrations, Sulfate Aerosols and Rain water Chemistry at Bijodaira, western slope of Mt. Tateyama, Japan

Size-separated aerosol number concentrations and sulfate aerosols as well as rain water chemistry were simultaneously measured at Bijodaira (altitude, 977m), western slope of Mt. Tateyama, near the coast of the Japan Sea, during the autumn in 2007. The number concentrations of particles were usually higher in the daytime than in the nighttime. The sulfate particles were well correlated with the number concentrations of the fine particles. High concentrations of sulfate and the fine particles were sometimes detected. The high sulfate aerosols might have been transported from the polluted regions in the Asian continent. The trans-boundary pollutants highly affected the chemical characteristics of bulk samples rain water.