Abstract

Measurements of particle-size distribution of total aerosols, sulfate, ammonium and nitrate were made in Nagoya, Japan, and the size distributions of the total aerosol and the individual chemical components are described. The size distribution of total aerosols comprised two different populations, one of natural origin, the other originating from pollutants. Sulfate and ammonium were predominantly associated with submicron particles, and the size distributions were both in good agreement with those parts of the populations of total aerosols which originated from pollutants. The size distributions of nitrate were bi-modal like those of total aerosol. Sub-micron particles dominated the nitrate distribution in winter, but were few in summer.

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