引用本文:梁星.上海市奉贤区O3污染特征与影响分析[J].环境监控与预警,2022,14(2):78-84
LIANG Xing.O3Pollution Characteristics and Influence Factors of Fengxian District, Shanghai[J].Environmental Monitoring and Forewarning,2022,14(2):78-84
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上海市奉贤区O3污染特征与影响分析
梁星
上海市奉贤区环境监测站,上海 201400
摘要:
于2014—2019年,对上海市奉贤区4个环境空气自动监测站的臭氧(O3)污染特征及其影响因素监测数据进行了统计分析。结果表明,O3质量浓度年均值大体平稳且略呈下降趋势,O3日8h质量浓度中位值和最大值呈现逐步上升趋势,O3质量浓度的最高点和次高点均出现在4—10月。气温与O3质量浓度呈显著正相关关系;随着风速和湿度上升,O3质量浓度和超标率呈现先升后降的趋势;风向为正南风、西南风和西南偏南风时,O3质量浓度和超标率均高于其他风向;O3质量浓度月均值与前体物一氧化碳(CO)、一氧化氮(NO)、二氧化氮(NO2)和氮氧化物(NOx)浓度月均值均呈负相关关系;从空间上来看,奉浦站点O3污染最为严重,其O3质量浓度日均值最高,且超标天数最多。
关键词:  臭氧  气象因素  臭氧前体物  污染特征
DOI:
分类号:X823
基金项目:
O3Pollution Characteristics and Influence Factors of Fengxian District, Shanghai
LIANG Xing
Fengxian District Environmental Monitoring Station of Shanghai,Shanghai 201400,China
Abstract:
A statistical analysis was made on the monitoring data about the characteristics and influencing factors of O3 pollution monitored at the 4 automatic air monitoring stations in Fengxian District, Shanghai during 2014—2019. The result suggests that the trend of annual average O3mass concentration was generally stable with a slight decline. The median and maximum daily O3 mass concentration in 8 hours showed a gradual increase trend, and the highest and second highest mass concentration occurred during April to October. There was a significant positive correlation between temperature and O3 mass concentration. With increased of wind speed and humidity, the O3mass concentration and the out of limit frequency increased first and then declined. The O3mass concentration and the out of limit frequency was higher in case of south wind, southwest wind and south by southwest wind than in case of wind in other directions. There was a negative correlation between monthly average O3 mass concentration and the monthly average concentration of its precursors such as CO, NO, NO2and NOx. From spatial perspective, the O3 pollution monitored at Fengpu Station was the most serious, with the highest daily average mass concentration and the greatest number of days with out of limit mass concentration.
Key words:  O3  Meteorological factors  Ozone precuror  Pollution characteristics