Chemical characteristics and precipitation fluxes of soot transported to Japan

用离子色谱仪对每周采集的碳烟样品的化学特性和沉降通量进行了评价，并用称重天平对过滤后的碳烟样品进行了评价。日本烟尘的降水通量还没有得到澄清。这些样本是在日本青森的Hirosaki收集的，时间为一年。烟尘的通量估计与日本的黄沙通量相似。每周氯离子浓度与烟尘通量相关，表明烟尘和氯离子都是随冬季盛行的西风携带来的，烟尘来自中国大陆。应详细讨论出现这种情况的可能原因。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.