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首页> 外文期刊>Journal of Environmental Science and Health >Urban air quality assessment using monitoring data of fractionized aerosol samples, chemometrics and meteorological conditions
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Urban air quality assessment using monitoring data of fractionized aerosol samples, chemometrics and meteorological conditions

机译:使用细分的气溶胶样品,化学计量学和气象条件的监测数据进行城市空气质量评估

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The present article deals with assessment of urban air by using monitoring data for 10 different aerosol fractions (0.015-16 mu m) collected at a typical urban site in City of Thessaloniki, Greece. The data set was subject to multivariate statistical analysis (cluster analysis and principal components analysis) and, additionally, to HYSPLIT back trajectory modeling in order to assess in a better way the impact of the weather conditions on the pollution sources identified. A specific element of the study is the effort to clarify the role of outliers in the data set. The reason for the appearance of outliers is strongly related to the atmospheric condition on the particular sampling days leading to enhanced concentration of pollutants (secondary emissions, sea sprays, road and soil dust, combustion processes) especially for ultra fine and coarse particles. It is also shown that three major sources affect the urban air quality of the location studied-sea sprays, mineral dust and anthropogenic influences (agricultural activity, combustion processes, and industrial sources). The level of impact is related to certain extent to the aerosol fraction size. The assessment of the meteorological conditions leads to defining of four downwind patterns affecting the air quality (Pelagic, Western and Central Europe, Eastern and Northeastern Europe and Africa and Southern Europe). Thus, the present study offers a complete urban air assessment taking into account the weather conditions, pollution sources and aerosol fractioning.
机译:本文通过使用在希腊塞萨洛尼基市典型城市站点收集的10种不同气溶胶组分(0.015-16微米)的监测数据来评估城市空气。该数据集经过多变量统计分析(聚类分析和主成分分析),此外还接受了HYSPLIT回溯轨迹建模,以便以更好的方式评估天气状况对识别出的污染源的影响。该研究的一个特定元素是努力阐明异常值在数据集中的作用。异常值出现的原因与特定采样日的大气状况密切相关,这导致污染物(二次排放,海浪,道路和土壤尘埃,燃烧过程)的浓度增加,特别是对于超细和粗颗粒。研究还表明,三个主要来源会影响所研究地点的城市空气质量,如海浪,矿物粉尘和人为影响(农业活动,燃烧过程和工业来源)。冲击程度在一定程度上与气溶胶分数的大小有关。对气象条件的评估导致定义了影响空气质量的四个顺风模式(平原,西欧和中欧,东欧和东北欧以及非洲和南欧)。因此,本研究提供了一个完整的城市空气评估,其中考虑了天气条件,污染源和气溶胶分馏。

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