偏光光散乱式粒子数計測装置による鉱物粒子濃度推定方法の検討

抄録

Abstract Measurements of aerosol number concentration using a polarization optical particle counter (POPC) and filter sampling were simultaneously conducted in Kofu, Japan, from February 17 till July 1 in 2013 to develop an identification procedure of Asian dust (mineral dust) particles from the POPC measurements. The correlations of the particle volume concentrations in 40-size bins to the depolarization ratio calculated from the POPC measurement, the mass concentrations of ionic species, and the volume concentrations of water-insoluble particles were investigated. We proposed the classification criteria for mineral dust, anthropogenic, and sea-salt particles using the POPC. The mass concentrations of mineral dust particles estimated using the criteria from the POPC measurement correlated strongly with those calculated from the mass concentrations of non-sea-salt Ca²⁺ (R²=0.936).