2014 年 29 巻 S1 号 p. s82-s94
In this paper, research studies on the long-range transport of particulate air pollutants such as PM2.5 and Polycyclic Aromatic Hydrocarbons (PAH), which are of great concern with regard to human health, around Japan and the East Asian region are reviewed briefly, with an emphasis on the results of a research project which the authors have been conducting for four years. Year-round measurements of PM2.5 at upwind area, i.e., at remote islands and urban sites in the northern Kyushu area of Japan, since spring 2009, have shown that PM2.5 mass concentration and major chemical composition in the northern Kyushu area, even in such a large city as Fukuoka, are dominated by the influx of regional air pollution from the Asian continent throughout the year. Organic pollutants in the particulate state such as PAH and n-alkenes also appeared to be transported from the Asian continent in spring, fall, and winter. Single particle analysis employing Laser Ionization Single Particle Aerosol Mass Spectrometer (LISPA-MS) revealed the internal mixing state of Pb and other metallic elements such as Zn and Sn in aerosol col lected at Fukue Island in spring, suggesting the substantial contribution of coal and industrial waste burnings to the long-range transported fine aerosols. The knowledge obtained in the series of studies by the authors complemented the previously reported short-term measurements conducted in a number of locations in the middle and northern part of the East China sea, providing a larger picture of the aerosol pollution status in the area and suggesting a direction for the countermeasure.
