Kosa (yellow sand) components in precipitation collected at central Japan

查看全文 作　　者：Chohji [1]Tetsuji;Kitamura [2]Moritsugu;Tabata [1]Masahiro 机构地区：[1]Department of Ecomaterials Engineering, Toyama National College of Technology, 13 Hongo-machi, Toyama 939-8630, Japan;[2]Ishikawa Prefectural Institute of Public Health and Environmental Science, Taiyogaoka, Kanazawa 920-1154, Japan 出　　处：《Science China Earth Sciences》索引2002年第45卷第z1期,共7页 摘　　要：In east Asia, acidic gases derived from fossil fuel combustion have increased in the pastdecades. On the other hand, the Asian dust, also called Kosa (yellow sand) is transported follow-ing windstorms from arid lands in the Asian continent. Many researchers have been interested inthe reaction between acidic aerosols and Kosa aerosols as well as the long-range transport ofthese emissions. To investigate the characteristics of chemical components in precipitation on along-term basis over Japan, precipitation was sequentially collected from April 1984 to March 1997at Kanazawa located near the coast of the Sea of Japan. Precipitation samples were collected at 1mm intervals for the first 5 mm rainfall and all volume of rainwater after 6 mm for all precipitationevents with an automatic wet only precipitation collector. According to the analyses of precipitationincluding Kosa aerosols during Kosa periods, the reaction in the air between Kosa and acidiccomponents during the long-range transport was discussed. 关 键 词：KOSA aerosols, ACIDIC gases, precipitation, chemical components, neutralization.