眉山市空气质量时间变化规律研究

Air Quality Analysis of Time- variation Characteristics for Meishan City

基于眉山市2008年至2012年环境空气质量监测数据,分析了眉山市空气质量时间变化规律。结果表明,1SO2日变化呈明显单峰变化趋势,最大值出现在10时左右;2NO2、PM10日变化呈W型,NO2最低值出现在15时左右,最大值出现在21时左右;PM10小时浓度峰谷值较NO2延后2小时左右;3SO2、NO2、PM10月均浓度呈V型变化,各污染物夏季浓度最低,冬季浓度最高。

Based on the environmental monitoring data from year 2008 to 2012, this study analyzes the time -variation char- acteristics of air quality of Meishan city. The results show that：①the concentration of SO2 daily change fits to a bell shape, the maximum value is at approximately 11：00; ②the concentration of NO2 and PM10 daily change is like a wave, owned two peaks and two alleys, the maximum values of NO2 and PMlo are at approximately 21：00 and 23：00 respectively; The minimum values of NO2 and PM10 is at approximately 15：00 and 17：00 respectively. ③the concentration of pollutants discussed in this paper monthly change is like a＇charaeter V, the maximum and minimum value is at summer and autumn respectively.