气象科学2026，Vol.46Issue(1)：68-79,12.DOI:10.12306/2025jms.0054
苏州市臭氧污染特征及影响因素分析
Characteristics of ozone pollution and influencing factors in Suzhou
摘要
Abstract
In recent years,ozone pollution in Suzhou has occurred frequently,and emerged as a key bottleneck restricting continuous improvement of air quality.Based on ambient air monitoring data,this study analyzes characteristics of ozone pollution in Suzhou,and influencing factors,focusing on atmospheric Volatile Organic Compounds(VOCs)and meteorological conditions.Furthermore,sources of VOCs are explored by using Positive Matrix Factorization(PMF)model and on-site investigations of exhaust emissions from industrial enterprises in National Economic and Technological Development Zone.The major results are as follows.The ozone concentration in Suzhou has shown a fluctuating upward trend,with an average annual growth rate of 2.6 μg·m-3·a-1.The proportion of ozone-exceeding days has continued to rise,from 34.9%in 2016 to 72.9%in 2023.Seasonal variation of ozone concentration presents a bimodal distribution,with the first peak in June and the second in August.Among the VOCs in Suzhou,acetaldehyde,ethylene,toluene,m-p-xylene and propylene exhibit relatively high ozone formation potential.PMF model analysis reveals that industrial processes,motor vehicle exhaust,fossil fuel combustion,oil&gas volatile and solvent usage are the primary emission sources of VOCs.Combined with on-site exhaust emission investigations of most industrial enterprises,the electronic equipment manufacturing,general equipment manufacturing,and rubber&plastic products industries contribute significantly to VOCs emissions,accounting for 71.2%of the total.Regarding meteorological factors,the relative ozone-exceeding rate in Suzhou is positively correlated with daily maximum temperature,while negatively correlated with relative humidity and wind speed.When the wind direction is southeast,south-southeast,or south,the ozone-exceeding rate ranges from 22.3%to 31.9%,which is higher than that under other wind directions.Targeted and sustained in-depth reduction of atmospheric VOCs is of great practical significance for the prevention of ozone pollution and the continuous improvement of air quality.关键词
臭氧污染特征/大气挥发性有机物/来源解析/制造业/气象因素Key words
characteristics of ozone pollution/atmospheric VOCs/source apportionment/manufacturing industry/meteorological factors分类
资源环境引用本文复制引用
楚翠姣,钟声,王体健,孙旭光,孙鹏,马茜雅..苏州市臭氧污染特征及影响因素分析[J].气象科学,2026,46(1):68-79,12.基金项目
国家重点研发计划项目(2022YFE0106600) （2022YFE0106600）
国家自然科学基金资助项目(42375036 （）
41505059) （）
江苏省环境监测科研基金项目(24A06) （24A06）
江苏省省级生态环境科研项目(2025016) （2025016）
