2004～2015年北京市清洁点臭氧浓度变化特征  

Characteristics of Ozone Background Concentration in Beijing from 2004 to 2015

作　　者：程念亮[1,2,3] 李云婷[1] 张大伟[1] 陈添[4] 魏强[1] 孙彤卉[1] 王步英[1] 富佳明[1] 何乐为[1] 程兵芬[2,3] 皮帅 马立光[1] 崔继宪[1] 孟凡[2,3] 

机构地区：[1]北京市环境保护监测中心,大气颗粒物监测技术北京市重点实验室,北京100048 [2]北京师范大学水科学研究院,北京100875 [3]中国环境科学研究院,北京100012 [4]北京市环境保护局,北京100048

出　　处：《环境科学》2016年第8期2847-2854,共8页Environmental Science

基　　金：环境保护公益性行业科研专项(201409005);国家科技支撑计划项目(2014BAC23B03);北京市共青团优秀人才培养项目

摘　　要：利用2004~2015年北京市自动监测网络O_3浓度数据,综合探讨了北京市清洁点定陵站O_3浓度的变化特征,结果表明,定陵站2004~2015年O_31h浓度整体呈上升的趋势,年均浓度增长率为4.40μg·m^(-3),定陵站O_38h浓度整体呈下降的趋势,年均浓度增长率为-1.0μg·m^(-3),5~9月O_38h平均浓度增长率为-1.5μg·m^(-3).近3年来定陵站O_38h重度污染天数增加明显,O_3污染形势严峻.定陵站每年6月左右O_3浓度达到一年中的峰值,日变化上15:00~18:00左右出现小时浓度峰值且O_3日峰值浓度是中心城区的1.01~1.56倍;不同年份5~9月定陵站O_3日峰值浓度与城区站明显存在1 h滞后的现象,定陵站峰值浓度与城区峰值浓度之差近年来明显缩小,这可能一方面与O_3区域污染输送有关,另一方面可能与北京市城镇化扩张有关.Based on the hourly O_3 monitoring data from 2004 to 2015 of Beijing,a comprehensive discussion on the characteristics of O_3 concentration at a background station Dingling in Beijing was conducted. The results showed that the annual concentration of O_31 h was increasing with a growth rate of 4. 40 μg·m^（-3） while the annual concentration of O_38 h was decreasing with annual average rates of- 1. 0 μg·m^（-3） and- 1. 5 μg·m^（-3） from May to October in 2004 and 2015. Over the past 3 years,number of O_38 h severe pollution days increased significantly and the situation of O_3 pollution in Beijing became more serious. O_3 concentration reached its peak in June in a year and its diurnal peak concentration occurred at about 15： 00-18： 00 at Dingling station which was 101-1. 56 times larger than that in the urban center of Beijing. In different years,the ozone peak concentration at Dingling Station was 1h later than that in the urban center from May to October in diurnal variation and the difference of peak concentration was significantly reduced in recent years,which on the one hand may be related to regional ozone pollution,on the other hand may be related to the expansion of Beijing＇s urbanization.

关 键 词：O38h 变化趋势 光化学污染 北京 区域输送 

分 类 号：X511[环境科学与工程—环境工程]