北九州市における浮遊粉じんの推移と現状 : 長期間の観測データ(1970-1994)から
北九州市における浮遊粉じんの推移と現状 : 長期間の観測データ(1970-1994)から
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北九州市悬浮尘埃的变化趋势和现状：基于长期观测数据（1970-1994年）
DOI：
10.1248/jhs1956.42.182
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
浩三 城戸
中科院分区：
文献类型：
--
作者：
今泉 五和男;康博 大和;喜文 花田;靖史 松岡;征夫 江口;和彦 安田;浩三 城戸
在北九州市进行了一项长期（1970-1994）大气气溶胶研究。到1983年，气溶胶的年平均浓度逐渐下降，此后一直保持稳定。为了研究气溶胶质量的变化，对1972-1974年（第一期：严重污染期）和1984-1988年（第二期：改善期）收集的气溶胶总质量和成分进行了比较。除SO42-外，各组分（无机离子：SO42-、NO3-、F-、Cl-、Ca2+、Mg2+，金属离子：Fe、Mn、Zn、V、Pb）的减少率（%）远大于气溶胶量的减少率。II期气溶胶中NO3-的浓度是I期的54%，可以认为这是基于大气中NOx的减少（II期/ I期：45%），这应该是一个前兆。相比之下，气溶胶中SO42-的减少（88%）与大气SO2的减少（20%）之间存在非比例关系。这些结果反映了北九州市1970—1994年24 a的气溶胶变化特征。
A long-term (1970-1994) study of atmospheric aerosol has been conducted in Kitakyushu City. The annual mean concentrations of aerosol had gradually decreased until 1983 and they have been stable since then. To investigate the change of the aerosol quality, the total mass and constituents of aerosols collected for 1972-1974 (period I : heavily polluted period) and 1984-1988 (period II : improved period) were compared. The decrease rate (%) of all constituents (inorganic ions : SO42-, NO3-, F-, Cl-, Ca2+ and Mg2+ ; metals : Fe, Mn, Zn, V and Pb) except SO42- was much larger than that of the aerosol amount. The concentration of NO3- in the aerosol in period II was 54% of that in period I. It was considered that this result was based on the decrease (period II/period I : 45%) of atmospheric NOx, which was supposed to be a precursor. In contrast, there was a nonproportional relationship between the decrease (88%) of SO42- in the aerosol and the decrease (20%) of atmospheric SO2. These results show the characteristic of the change of aerozol in Kitakyushu City for 24 years (1970-1994).