Evaluation of Ionic Pollutants of Acid Fog and Rain Using a Factor Analysis and Back Trajectories
Evaluation of Ionic Pollutants of Acid Fog and Rain Using a Factor Analysis and Back Trajectories
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利用因子分析和回溯轨迹评估酸雾和酸雨的离子污染物
DOI：
10.2116/analsci.17.71
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发表时间：
2001
影响因子：
1.6
通讯作者：
N. Ogawa
中科院分区：
文献类型：
--
作者：
Tetsuya Adzuhata;Junko Inotsume;Tomoko Okamura;Ryoei Kikuchi;T. Ozeki;M. Kajikawa;N. Ogawa
1998年和1999年6 - 9月在日本北部秋田八幡台山脉同时采集了雾和雨水样本。分析了这些样品中的不同离子浓度，并测量了每次雾事件的雾滴大小。随着雾滴尺寸的增大，离子浓度降低。浓度与液滴大小的对数对数曲线斜率随离子种类的不同而不同。此外，为了表征空气污染物，这些数据进行了定量分析斜旋转因子分析。结果表明：（NH_4）_2SO_4、酸（HNO_3 + H_2SO_4）和海盐是大气污染源。将因子分析与850 hPa水平72 h反轨迹相结合，发现各因子的贡献随气团输送方式的不同而不同。
Fog and rain water samples were collected at the same time in the Akita Hachimantai mountain range in northern Japan from June to September in 1998 and 1999. The various ion concentrations in these samples were analyzed, and the fog droplet sizes were measured for each fog event. As the fog droplet size increased, the ion concentration decreased. The slope of log-log plots of the concentration versus the droplet size differed with the kind of ion. In order to characterize the air pollutant, moreover, these data were quantitatively analyzed by an oblique rotational factor analysis. We found that three factors were extracted as the air pollutant source: (NH_4)_2SO_4, acids (HNO_3 + H_2SO_4) and sea-salt. Combining the factor analysis with the 72 h back-trajectory at 850 hPa level, we found that the contribution of each factor varied with the transport pattern of air masses.