利用辽宁中部地区2012年6月1日至2013年5月31日观测数据,研究了城市大气可吸入颗粒物质量浓度和气象要素的之间的相关性。结果表明:对辽宁中部地区整体来说,秋、冬季的可吸入颗粒物排放在全年贡献比例较大;对区域各城市来说,沈阳和鞍山的颗粒物污染贡献较大。区域颗粒物浓度在午后达到最低,清晨升至最高,而能见度则在这两个时段分别达到最高和最低。颗粒物浓度与相对湿度的变化趋势基本一致,与能见度、气温和风速的变化趋势相反。颗粒物(尤其是大气细粒子)浓度与能见度的相关关系最为显著,这种相关性在夏、秋、冬季更加明显,而在鞍山、本溪两地尤为突出。
Using hourly data of particles concentrations(PM10, PM2.5, PM1.0), visibility, and relevant atmospheric variables from June 1 of 2012 to May 31 of 2013 in central Liaoning Province, correlations of particles concentrations and atmospheric variables were precisely researched. The results show that the proportion of particles emission is relatively high in winter and autumn, and the proportions of particles emission in Shenyang and Anshan are higher than in the other cities in the region. The particles concentrations go through a single cycle with a high point in the morning and a low point in the afternoon. Variations of particles concentrations are in accordance with the variation of relative humility, while in opposition to the variations of visibility, temperature. Visibility relates to particle concentration closer, especially fine particles, and the correlations are more significant in summer, autumn and winter, and more prominent in Anshan and Benxi.
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