Chemical characteristics and precipitation fluxes of soot transported to Japan

用离子色谱仪对每周收集的大量沉淀烟灰样品和用称重秤对过滤后的烟灰样品的化学特性和沉淀通量进行了评价。日本烟尘的降水通量尚未明确。样本是在日本青森市广崎市一年内收集的。据估计，烟尘的通量与日本的黄沙通量相似。周氯离子浓度与烟灰通量相关，表明烟灰和氯离子都是随冬季盛行风从西部吹来的，因此烟灰来自中国大陆。应该详细讨论这种观察的可能原因。为了研究烟尘降水与风向之间的关系，必须在日本海上空采集样本。

Chemical characteristics and precipitation fluxes of soot samples were evaluated for weekly collected bulk precipitation by ion chromatograph and for the filtered soot with weighing balance. The precipitation flux of the soot in Japan has not been clarified. The samples were collected during one year, in Hirosaki, Aomori, Japan. The flux of the soot was estimated as similar amount as the flux of yellow sand in Japan. Weekly chloride ion concentrations are correlated to the fluxes of soots, suggesting that both the soots and the chloride ions were carried with the winter prevailing winds from west and, thus, that the soots come from the china continent. Possible reasons for this observation should be discussed in detail. To examin also the relation between the soot precipitation and the wind direction, the samples must be collected over the Japan Sea.