On the Atmospheric Aerosol Particles in Relation to the Pressure Patterns in Winter Season, Sapporo, Japan

概要

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To clarify the characteristics of the source of air pollution in relation to the pressure patterns in a winter season, sampling of atmospheric aerosol particles was carried out for each wind direction on the top of Mt. Teine (1,024 m a.s.l.) (mountain site) arid in the campus of Hokkaido University (urban site) in Sapporo City, Hokkaido, Japan in the winter season of 1987. In the winter monsoon pressure pattern, the concentration of anthropogenic aerosols (Carbon and SO^<2->_4) was mainly affected by easterly winds at both sites. On the other hand, the concentration of marine aerosols (Na, K, Cl^-, etc.) in the urban site showed high values under westerly winds as compared with the mountain site. Especially, in the case of pressure distribution with Japan Sea-low pressure pattern, the concentration of soil particles (Al, Ca, etc.) was generally higher than that of marine and anthropogenic aerosols at both sites. During the sampling period, the total concentration of aerosol particles showed the highest value under easterly winds in the case of a travelling high pressure. In addition to these analyses, the aerosol particles collected on millipore filter papers using a continuous aerosol sampler were analyzed by SEM and EMAX.
北海道大学の論文