银川市臭氧质量浓度时空分布特征及相关因子分析

Analysis of the temporal and spatial distribution characteristics of ozone concentration and correlation factors in Yinchuan

根据2015年银川市环境空气自动监测站点的臭氧监测数据,分析了银川市臭氧质量浓度的时空分布特征及相关因子的变化趋势。结果表明,2015年银川市臭氧平均质量浓度达到国家二级标准;臭氧质量浓度呈现出明显的季节、月份、日小时变化特征,臭氧质量浓度夏季最高、冬季最低,7月是臭氧质量浓度最高的月份,在每日15∶00和17∶00臭氧质量浓度达到峰值;全年兴庆区臭氧质量浓度高于金凤区、西夏区两个辖区;臭氧质量浓度受PM2.5、NOx、NO2及风速、气温、能见度和相对湿度的共同影响。

Based on the monitoring data of ozone about Air Quality Automatic Monitoring Station in Yinchuan in 2015,the space and time distribution characteristics and the variation trend and other related factors about concentration of ozone were analyzed.Results indicated that the average concentration of ozone reached national secondary standard in Yinchuan in 2015;the variation characteristics of seasons,months,day hour variation of ozone concentration were very obviously,ozone concentration was the highest in summer,the lowest in winter,and it is the highest in July,the daily peak of ozone concentration at 15:00 and 17:00.Ozone concentration in Xingqing district was higher than the other two districts yearly.Ozone concentration was mutually influenced by PM2.5,NOx,NO2,wind speed,temperature,visibility and relative humidity.