Chemical characteristics of free tropospheric aerosols over the Japan Sea coast: aircraft-borne measurements
Chemical characteristics of free tropospheric aerosols over the Japan Sea coast: aircraft-borne measurements
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日本海沿岸自由对流层气溶胶的化学特征：机载测量
DOI：
10.1016/s1352-2310(98)00262-3
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发表时间：
1999
影响因子：
5
通讯作者：
M. Nishikawa
中科院分区：
文献类型：
--
作者：
I. Mori;Y. Iwasaka;K. Matsunaga;M. Hayashi;M. Nishikawa
利用飞机载九级级撞击器（粒径范围0.1 ~ 8μm），从1992 ~ 1994年在日本海沿岸的自由对流层直接收集大气气溶胶颗粒物质。采用离子色谱法对气溶胶颗粒物中的水溶性组分进行了分析。大部分样品中均检测到硫酸铵颗粒，其粒径分布在1μm以下有明显的峰。半数样品中检测到水溶性钙（Ca2+）；粒径分布表明，最大粒径大于1μm；大颗粒中高浓度的Ca2+可能是由于自由对流层中来自亚洲大陆的科沙气溶胶的运输。随着Ca2+浓度的增加，细颗粒物硫酸盐和铵的浓度有增加的趋势，这表明在含科沙颗粒气团的远程输送过程中，可能存在科沙气溶胶和非科沙气溶胶的混合。
Atmospheric aerosol particulate matter was directly collected in the free troposphere over the Japan Sea coast between 1992 and 1994 using an aircraft-borne nine-stage cascade impactor (particle size range: 0.1–8μm). The water-soluble components in the aerosol particulate matter were analyzed by ion chromatography. Particulate sulfate and ammonium were detected in most of the samples and their size distributions showed noticeable peaks below the 1μm particle size range. Water-soluble calcium (Ca2+) was detected in half of the samples; the size distribution showed that the maximum particle size was larger than 1μm. Highly concentrated Ca2+in larger particles was possibly due to transport of Kosa aerosols from the Asian continent in the free troposphere. The concentration of fine particulate sulfate and ammonium tended to increase whenever Ca2+was detected, which suggests possible mixing of Kosa aerosols and non-Kosa aerosols during long-range transport of air masses containing Kosa particles.