摘要
使用北戴河环保监测站二氧化氮与臭氧1小时平均浓度监测数据,分析2014年-2022年臭氧超标前后5小时及超标过程中气体浓度的变化,结果表明:臭氧浓度年均值呈逐年增长趋势,二氧化氮浓度年均值呈逐年减小趋势。臭氧与二氧化氮浓度为线性负相关,相关系数为0.69235。臭氧超标前5小时二氧化氮浓度迅速减小,超标后5小时二氧化氮浓度迅速增加。臭氧污染持续时间越久二氧化氮消耗越多,臭氧污染浓度越高二氧化氮浓度越低,当持续污染时间超过12小时或臭氧浓度大于400μg/m 3,二氧化氮与臭氧浓度的比值将减小到超标初1小时浓度比值的50%以上,臭氧污染时间越长二氧化氮与臭氧浓度的比值增大越明显。
Based on the monitoring data of 1-hour average concentration on nitrogen dioxide and ozone oxygen in Beidaahe environmental monitoring station,the changes of ozone and nitrogen dioxide concentrations were analyzed during 5 hours before ozone pollution and after ozone pollution.The results show that annual average value of ozone concentration increased year by year,and annual average of nitrogen dioxide concentration decreased year by year.One-hour annual average concentration of ozone and nitrogen dioxide was a significant linear negative correlation,and the correlation coefficient was 0.69235.The concentration of nitrogen dioxide was rapidly decreasing during 5 hours before the ozone pollution.Nitrogen dioxide concentration increased rapidly within 5 hours after the ozone pollution.The longer periods of ozone pollution was associated with the more consumption of nitrogen dioxide,the higher ozone pollution concentration was accompanied by the lower the nitrogen dioxide concentration.If the continuous pollution time exceeds 12 hours or the ozone concentration was greater than 400μg/m 3,Compared with the ratio of nitrogen dioxide to ozone concentrations during the first hour of exceeding the standard,the ratio of their concentrations would reduced more than 50%.The ratio of nitrogen dioxide to ozone concentration was significantly increased within the longer ozone pollution time.
作者
张建东
杨宗记
张宝贵
李飏
Zhang Jiandong;Yang Zongji;Zhang Baogui;Li Yang(Qinhuangdao Meteorological Bureau,Qinhuangdao 066000,China)
出处
《环境科学与管理》
CAS
2024年第3期95-99,共5页
Environmental Science and Management
基金
国家科技重大专项:人类活动影响与生存环境安全评估(2019QZKK0608,2019-2024)。
关键词
臭氧
二氧化氮
前体物
关系
ozone
nitrogen dioxide
precursors
relationships
