引用本文:咸月,祁梦,刘倩,赵秋月,韩军赞,陈凤.盐城市臭氧污染特征及影响因素[J].环境监控与预警,2018,10(3):45-49
XIAN Yue, QI Meng, LIU Qian, ZHAO Qiu yue, HAN Jun zan, CHEN Feng.The Characteristics of Ozone Pollution and Its Influencing Factors in Yancheng[J].Environmental Monitoring and Forewarning,2018,10(3):45-49
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盐城市臭氧污染特征及影响因素
咸月,祁梦,刘倩,赵秋月,韩军赞,陈凤1,2
1. 盐城市环境监测中心站,江苏 盐城 224000;2. 江苏省环境科学研究院,江苏省环境工程重点实验室,江苏 南京 210036
摘要:
对2015—2016年盐城市城区4个空气质量自动监测国控站点的O3 监测数据进行分析,探讨盐城市O3 污染水平、时空分布特征及其与前体物、气象因子之间的关系。结果表明,各站点O3污染水平较为接近,2016年各站点O内容-8h第90百分位数超标天数较2015年分别下降了43.5%,50.0%,8.7%和43.6%;全年O3 逐月值大致呈双峰分布,高ρ(O3)主要集中在4—10月;O3日变化曲线呈明显的单峰分布,一般在05:00—07:00最低,13:00—15:00达到峰值;不同季节的O3日变化情况有所差异,午后O3 峰值与O3 日变化幅度均在春季最大,冬季最低;NO、NO2 和CO的日变化曲线均呈现出早晚双峰分布,受早高峰影响,一般在07:00左右达到一日中的最大值;O3与NOx 等前体物均显著负相关,高ρ(O3)往往出现在高ρ(CO)/ρ(NO2)时;总体上各站点的ρ(O3)随风速的增大而增大。
关键词:  盐城  臭氧  污染特征  影响因素
DOI:
分类号:X513
文献标识码:B
基金项目:国家重点研发计划基金资助项目(2016YFC0201502);江苏省环保科研计划基金资助项目(2016015)
The Characteristics of Ozone Pollution and Its Influencing Factors in Yancheng
XIAN Yue, QI Meng, LIU Qian, ZHAO Qiuyue, HAN Junzan, CHEN Feng1,2
1.Yancheng Environmental Monitoring Center, Yancheng,Jiangsu 224000, China;2. Jiangsu Provincial Academy of Environmental Science, Jiangsu Provincial Key Laboratory of Environmental Engineering, Nanjing,Jiangsu 210036, China
Abstract:
Monitoring data from 2015 to 2016 released by 4 state controlling air sampling sites in Yancheng were analyzed to study the pollution level and spatial and temporal characteristics of local ozone pollution as well as the impacts of precursors and meteorological factors. According to the research results, the O3 concentrations in different sites were quite close. The overall days exceeding the 90th percentile of O3-8h of national ambient air quality standard in 2016 decreased 43.5%,50.0%,8.7% and 43.6% for the 4 sites respectively when comparing to those in 2015. The monthly O3 concentrations were approximately bimodal distributed with high O3 mainly occurred in Apr.-Oct. The diurnal variation of O3 concentrations was obviously unimodal distributed, with the lowest O3 occurred at 05:00—07:00, and the peak value at 13:00—15:00. The diurnal variations varied in different seasons. Both the peak O3concentration in the afternoon and the daily rangeability were largest in the spring and lowest in the winter. On the contrary, the diurnal variation curves of NO, NO2 and CO were bimodal distributed. Influenced by the morning rush hour, those air pollutants usually reached the daily maximum concentration at about 07:00. O3 was significantly negatively correlated with the precursors such as NOx, and the high O3 was generally associated with high ρ(CO)/ρ(NO2) ratio. In general, the ρ(O3) at each site increased as the wind speed increased.
Key words:  Yancheng  Ozone  Pollution characteristics  Influencing factors