Continuous measurement of fine and ultrafine particulate matter, criteria pollutants and meteorological conditions in urban El Paso, Texas
Continuous measurement of fine and ultrafine particulate matter, criteria pollutants and meteorological conditions in urban El Paso, Texas
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DOI：
10.1016/s1352-2310(02)00935-4
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发表时间：
2003-02-01
影响因子：
5
通讯作者：
Neas, LM
中科院分区：
文献类型：
--
作者：
Noble, CA;Mukerjee, S;Neas, LM
1999年冬季，在德克萨斯州埃尔帕索连续测量了21天的气溶胶粒径分布。在埃尔帕索的两个城市的位置，使用两对扫描迁移率粒度仪和空气动力学粒度仪进行粒度分布测量。还对气相污染物（CO、NO、NO2、O-3）和气象条件进行了补充测量。在整个研究过程中，平均超细颗粒（直径小于0.1 μ m）数量浓度为14，400个颗粒cm（-3）。有一个显着的相关性之间的CO和超细和积累模式（那些在0.1和1 μ m之间的直径）颗粒计数，皮尔逊相关系数（r）值分别为0.81和0.87。NO与超细和累积模式颗粒数之间的相关性也是显著的，但不如CO与颗粒浓度的相关性强。大多数污染物被发现不同的昼夜周期，并遵循两个不同的趋势之一，无论是车辆交通时间表或阳光强度。风向不仅对污染物浓度有影响，而且对污染物之间的相关性也有影响。在南风的情况下，CO、NO和NO2的浓度比北风时高25-140%。同样，超细和积累模式的颗粒浓度约为。南风比北风大100%。爱思唯尔科技有限公司出版
Continuous measurements of aerosol size distributions were made in El Paso, TX, for a 21 day period in winter 1999. Size distribution measurements were performed at two urban locations in El Paso using two pairs of the scanning mobility particle sizer and the aerodynamic particle sizer. Complementary measurements also were performed for gas phase pollutants (CO, NO, NO2, O-3) and meteorological conditions. Throughout the study, the mean ultrafine particle (those smaller than 0.1 mum in diameter) number concentration was 14,400 particles cm(-3). There was a significant correlation between CO and both ultrafine and accumulation mode (those between 0.1 and 1mum in diameter) particle count, with the Pearson correlation coefficient (r) values of 0.81 and 0.87, respectively. The correlation between NO and both ultrafine and accumulation mode particle count is also significant, but not as strong as the correlation of CO and the particle concentrations. Most pollutants were found to vary on diurnal cycles and to follow one of two different trends, either vehicular traffic schedules or sunlight intensity. Wind direction was found to have an influence not only on pollutant concentrations, but also on the correlation between pollutants. With southerly winds, CO, NO and NO2 concentrations were 25-140% greater than when the wind was coming from the north. Likewise, ultrafine and accumulation mode particle concentrations were approximately. 100% greater for southerly than for northerly winds. Published by Elsevier Science Ltd.