【摘要】 利用河北工程大学大气环境监测站点的PM10、PM2.5、SO2和NOx在线监测数据,并结合能见度、湿度数据,对邯郸市2012年12月1日到2013年1月31日的大气污染状况进行分析,特别是2013年1月持续发生的霾天气,以探讨严重霾污染的过程特征.结果表明,2013年1月,SO2与NOx的平均浓度分别为225.3μg·m-3和217.8μg·m-3,PM10和PM2.5的平均浓度分别为328.5μg·m-3和229.4μg·m-3,均超过新颁布的环境空气质量标准,是2012年12月平均浓度的1.4~3.5倍.重污染过程分析结果显示,污染峰值附近几天内PM10、PM2.5的时均浓度变化无明显规律.累积阶段的PM2.5/PM10在0.42~0.52之间,峰值前后上升并超过0.70,扩散阶段PM2.5/PM10降到0.70以下,且呈波动式变化.当PM2.5/PM10小于0.40时,能见度基本位于2~18 km之间;当PM2.5/PM10在0.40~0.60之间时,能见度在0.7~8 km之间;当PM2.5/PM10大于0.60时,能见度分布于2km以下.更多还原

【Abstract】 The characteristics of air pollution in Handan during the time of December 1,2012 to January 31,2013 were analyzed using the online monitoring data of PM10,PM2. 5,SO2 and NOx,visibility and relative humidity observed at an air quality monitoring site in the Hebei University of Engineering. The result showed that,in January 2013,the average concentrations of SO2 and NOx were 225. 3 μg·m-3 and 217. 8 μg·m-3,respectively.The average concentrations of PM10 and PM2. 5 were 328. 5 μg·m-3 and 229. 4 μg·m-3,respectively. They were all beyond the new ambient air quality standard and were 1. 4 times to 3. 5 times the daily average concentrations of December. The analysis of the severe haze episode showed that the typical diurnal variations of hourly average concentrations did not appear during pollution episodes. The ratio of PM2. 5/PM10 was between 0. 42 ~ 0. 52 at accumulation stage,exceeded 0. 70 before and after the peak,and decreased less than 0. 70 and fluctuated at diffusion stage. The visibilities were between 2 ~18 km when this ratio was under 0. 40,falling into 0. 7 ~8 km when it was between 0. 40 to 0. 60,and under 2 km when the ratio exceeded 0. 60.更多还原