承德市臭氧及其前体物浓度变化特征

The Change of Ozone and its Precursor Concentration in Chengde

摘要:

采用2014—2016年承德市环境监测站和气象站的数据，对承德市O3、NO2、CO浓度和气温进行了分析，得出以下结论：承德市O3污染天数及所占的比重呈逐年增加趋势；O3 8h月平均浓度呈现夏季高而冬季低的季节变化特征，月平均气温与其呈现一致的变化趋势，其前体物NO2和CO则呈现相反的变化趋势，表现为冬季高而夏季低的特征； O3浓度的日变化呈单峰型分布，午后浓度升高而夜间浓度下降，与气温的日变化趋势一致，NO2呈现相反的变化趋势，CO呈三峰型分布，总体表现为中午浓度最高； O3 8h、NO2、CO浓度和气温总体均呈现北低南高的空间分布；O3 8h浓度与其前体物NO2和CO均呈显著的负相关关系。

Abstract:

The pollution of O3 in Chengde was analyzed based on the Chengde Environmental Monitoring Station’s and Weather Station’s data from 2014 to 2016, the conclusions are as follows: The proportion of O3 pollution days has increased year by year. Monthly average concentration of O3 8h presents high in summer and low in winter, the monthly average temperature is consistent with O3 changing trend, NO2 and CO show opposite trends, expressed as high in winter and low in summer. The diurnal variation of O3 concentration in Chengde was a single peak type distribution, O3 concentration increased in the afternoon and decreased in the night, consistent with the daily temperature changes, NO2 presents the opposite trend, the CO has a three-peak distribution and the overall performance is highest at noon. O3 8h, NO2, CO and air temperature all show a spatial distribution of north lower and south high in Chengde region. O3 8h concentration negatively correlated with NO2 and CO showed a significant.