石家庄市一次雨雪过程大气污染特征分析

为了研究气象条件与大气污染之间的关系,结合气象资料和环境监测数据分析了2015-11-21至2015-11-25石家庄市一次雨雪过程对各类污染源及污染物浓度的影响,并利用Pearson相关系数法分析不同污染物之间及污染物浓度与气象要素之间的相关关系。结果表明:此次雨雪过程对面源影响最大,扬尘接近零排放;对移动源的影响主要表现为机动车早晚高峰时段及车辆怠速时间的延长;对工业点源影响较小。颗粒态污染物与SO2,NO2和O3(8h)的浓度呈显著正相关,说明污染物来源呈现一定的同源性。雨雪期间主要污染物浓度与温度呈显著相关性,风速的扩散和稀释作用仅对PM2.5有较明显的影响。

Characteristics analysis of the atmospheric pollution after a sleet process in Shijiazhuang City

In order to study the relationship between meteorological conditions and air pollution, the influence of a sleet process, which is from November 21, 2015 to November 25, 2015 in Shijiazhuang City, to the different atmospheric pollution sources and the concentration of atmospheric pollutants is analyzed by combining meteorological conditions and environmental monitoring data. The relationship between different pollutants and the relationship between the pollutant concentrations and meteorological elements are analyzed by using the Pearson correlation coefficient method. The results show that the effect of the sleet process on non-point sources is the greatest, and the dust emission is close to zero; the effect of the sleet process on mobile sources is mainly manifested in the extended morning and evening peak time and the motor vehicles'' idle time; the sleet process has less influence on industrial point sources. There is significant positive correlation between the particle sized pollutants and the concentration of SO₂, NO₂ and O₃(8 h), which illustrates that the pollution sources have certain homology. There is significant correlation between the temperature and concentration of major pollutants during the sleet process, and the diffusion and dilution effect by wind speed is obvious just for PM2.5.