京津冀区域臭氧污染趋势及时空分布特征

发布时间：2018-02-14 23:30

本文关键词： 京津冀臭氧时空分布　出处：《中国环境监测》2017年01期 　论文类型：期刊论文

【摘要】：为研究京津冀区域的臭氧(O_3)污染情况及其时空分布特征,对2013—2015年京津冀区域13个城市80个国家环境空气监测点位的监测数据进行了统计分析。结果表明:2013—2015年,京津冀区域O_3污染状况整体呈加重趋势,其中2014年污染状况最为严重。13个城市中O_3污染最严重的城市为北京和衡水,连续3年均超标,且处于上升态势中。区域内不同城市O_3污染趋势并不相同。京津冀区域O_3浓度变化呈明显的季节变化特征,春末和夏季的O_3污染最严重。O_3-8 h(臭氧日最大8 h均值)年均值的高值区主要分布在北京中北部、承德和衡水等,2013—2015年第90百分位O_3-8 h的高值区均集中分布在北京。O_3的浓度峰值时间要晚于NOx2~5 h。O_3在春、夏季呈单峰分布,白天15:00左右出现最大值,在秋、冬季浓度较低,全天波动不大。
[Abstract]:In order to study the status of ozone pollution and its spatial and temporal distribution in Beijing-Tianjin-Hebei region, the monitoring data of 80 national ambient air monitoring points in 13 cities of Beijing-Tianjin-Hebei region from 2013 to 2015 were analyzed statistically. The results show that: 2013-2015, In Beijing, Tianjin and Hebei, the overall situation of O _ 3 pollution increased, with the most serious pollution in 2014. Among the 13 cities, Beijing and Hengshui were the most polluted cities, which exceeded the standard for three years in a row. The trend of O _ 3 pollution in different cities is not the same. The variation of O _ 3 concentration in Beijing-Tianjin-Hebei region is seasonal. In late spring and summer, the high value area of the annual mean value of the annual mean value of O _ 3 pollution in late spring and summer is mainly located in the central and northern part of Beijing. The high value regions of 90th percentile in Chengde and Hengshui from 2013 to 2015 were concentrated in Beijing. O _ 3 concentration peak time was later than that of NOx2~5 h 路O _ (3) in spring and summer, the maximum value appeared at about 15:00 in daytime, and the concentration was lower in autumn and winter. There is little fluctuation throughout the day.
【作者单位】：中国地质大学(北京)水资源与环境学院;中国环境监测总站国家环境保护环境监测质量控制重点实验室;
【分类号】：X515

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