保定市夏季臭氧及其前体物浓度变化特征分析

Characteristic Analysis of Concentration Change of Summer Ozone and Its Precursor in Baoding City

[目的]研究河北省保定市臭氧及其前体物浓度变化特征。[方法]利用2013年7~8月各环境空气自动监测点位臭氧及其前体物的监测数据,对臭氧和氮氧化物、一氧化碳的日变化规律及相关性,以及＂周末效应＂及其相关性进行了分析。[结果]臭氧小时值呈单峰型日变化规律,与太阳辐射强度呈正相关;氮氧化物小时值呈双峰型日变化规律,与臭氧变化趋势呈负相关;一氧化碳小时值呈双峰型日变化规律,变化规律与氮氧化物相近,与臭氧呈负相关;各污染物均呈现出明显的＂周末效应＂。[结论]臭氧浓度值与其前体物浓度值呈负相关。

[Objective] To research the characteristic analysis of concentration change of summer ozone and its precursor in Baoding City.[Method]According to the monitoring data of ozone and its precursor in ambient airs at automatic monitoring sites from July to August in 2013,we analyzed the daily variation rule and correlation of ozone,nitric oxide and carbon monoxide,as well as the weekend effects and its correlation.[Result]The hourly ozone variation of ozone was a single peak during the day,and showed positive correlation with solar radiation intensity.Hourly variation of nitric oxide was bimodal during the day and had negative correlation with ozone change trend. Hourly variation of carbon monoxide was bimodal,which had close change rule with nitric oxide and showed negative correlation with ozone. All different pollutants were exhibited the obvious weekend effect. [Conclusion] Ozone concentration showed negative correlation with the concentration of its precursor.