摘要
近年来,臭氧已逐渐取代颗粒物成为影响上海市虹口区环境空气质量的主要因素。基于虹口区国控空气站点2017~2021年自动监测数据,分析了虹口区臭氧及其形成重要前体物质二氧化氮浓度的变化趋势,结果发现:5年间虹口区臭氧和二氧化氮浓度整体均呈下降趋势,但仍保持在较高浓度水平;臭氧浓度春夏季高、秋冬季低,二氧化氮则为秋冬季高、春夏季低;两种物质日变化趋势与交通流量紧密相关。臭氧浓度受到区域输送影响,并与气象因子关系密切,同时与二氧化氮浓度呈明显负相关关系。由于臭氧浓度与污染源排放并非呈现简单的线性关系,提出了应制定更为细致的政策进行防范。
In recent years,ozone as an important factor affecting the ambient air quality in Hongkou District,Shanghai has gradually replaced particulate matter.Based on the automatic monitoring data of the state air monitoring stations in Hongkou District from 2017 to 2021,this paper analyzes the changing trend of ozone and its important precursor nitrogen dioxide concentration in Hongkou District.The results showed that the concentrations of ozone and nitrogen dioxide in Hongkou area showed a downward trend in the past five years,but remained at a relatively high level;ozone concentration was high in spring and summer and low in autumn and winter,while nitrogen dioxide was high in autumn and winter and low in spring and summer;The diurnal variation trends of the two substances are closely related to the traffic flow.Ozone concentration is affected by regional transportation and is closely related to meteorological factors.At the same time,there is a significant negative correlation between ozone concentration and nitrogen dioxide concentration.There is not a simple linear relationship between ozone concentration and pollution source emissions,and more detailed policies need to be formulated to prevent them.
作者
王婧
Wang Jing(Shanghai Hongkou District Environmental Monitoring Station,Shanghai 200083,China)
出处
《绿色科技》
2022年第14期108-112,120,共6页
Journal of Green Science and Technology
关键词
臭氧
二氧化氮
污染特征
气象因素
ozone,nitrogen dioxide
pollution characteristics
meteorological factors
