| 上海市金山区臭氧污染特征及典型污染过程分析 |
| Analysis of Characteristics of Ozone Pollution and a Typical Ozone Pollution Process in Jinshan District of Shanghai |
| 投稿时间：2024-05-06 修订日期：2024-10-28 |
| DOI：10.19316/j.issn.1002-6002.2025.04.10 |
| 中文关键词: 金山区 臭氧污染 挥发性有机物 来源解析 传输贡献 |
| 英文关键词:Jinshan District ozone pollution volatile organic compounds source apportionment transmission contribution |
| 基金项目: |
|
| 摘要点击次数: 531 |
| 全文下载次数: 697 |
| 中文摘要: |
| 综合利用多种在线监测数据,探讨金山区臭氧(O3)污染特征,并结合正交矩阵因子分解(PMF)、混合单粒子拉格朗日综合轨迹(HYSPLIT)和多尺度空气质量预报与模拟-臭氧源分配技术(WRF-CAMx-OSAT)等多种模型方法,对一次典型O3污染过程进行来源解析和传输分析。结果表明,2020—2023年,金山区环境空气污染类型为O3型,O3浓度日变化呈单峰形特征,且O3污染日的O3浓度高值持续时间不断变长。金山区2023年5月12—15日O3污染过程以区域传输为主导,不利气象条件加剧了O3的本地光化学生成与累积。烯炔烃和芳香烃是此次污染过程中对O3生成贡献较大的关键活性组分,对应的臭氧生成潜势(OFP)分别为90.6、74.7 μg/m3,两者贡献占比之和为81.0%。乙烯、丙烯、甲苯、间/对-二甲苯和反-2-丁烯是关键的前体物,OFP分别为47.1、29.8、26.2、25.4、8.2 μg/m3。运用PMF受体模型解析发现,污染期间金山区挥发性有机物(VOCs)主要来自油气挥发源(26.6%)、燃烧源(23.5%)和工业源(22.4%),机动车源(28.5%)、工业源(21.0%)和涂料溶剂使用源(19.8%)对本地O3生成起主导作用。基于传输模型模拟结果发现:观测期间O3污染的本地贡献占16.8%~21.6%;大部分污染时段的二甲苯和苯比值较低,表明气团老化程度较高;金山区此次O3污染过程主要受到海洋回流气团、西南方向浙江污染气团和西北方向安徽污染气团的传输影响。 |
| 英文摘要: |
| By integrating multiple online monitoring data in Jinshan District of Shanghai,the characteristics of O3 pollution were explored,and a typical O3 pollution process was analyzed for source apportionment and transmission pathways,by various modeling methods including Positive Matrix Factorization (PMF),Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT),and the Weather Research and Forecasting-Community Multiscale Air Quality-Optimized Simulation of Atmospheric Transport (WRF-CAMx-OSAT).The results showed that during 2020-2023,ambient air pollution in Jinshan District exhibited an O3 type pattern,with O3 concentrations displaying a single-peak diurnal variation.During O3 pollution days,the duration of high O3 concentration periods extended.The ozone pollution process from May 12 to 15,2023 was mainly dominated by regional transmission,while unfavorable meteorological conditions aggravated O3 local photochemical generation and accumulation.Olefin and aromatic hydrocarbons were identified as key reactive components contributing significantly to O3 formation,with Ozone Formation Potential (OFP) of 90.6 and 74.7 μg/m3,respectively.The sum contribution of the two ratio was 81.0%.The key precursor species were mainly ethylene,propylene,toluene,m/p-xylene and trans-2-butene,with OFP values of 47.1,29.8,26.2,25.4,8.2 μg/m3,respectively.Source apportionment using the PMF receptor model indicated that volatile organic compounds (VOCs) of Jinshan District mainly came from oil and gas volatile sources (26.6%),combustion sources (23.5%) and industrial sources (22.4%) during the pollution period.Motor vehicle sources (28.5%),industrial sources (21.0%) and paint solvent sources (19.8%) played a leading role in the generation of local O3.Transport model simulations indicated that local contributions to ozone pollution during the observation period ranged from 16.8% to 21.6%.The ratio of xylene to benzene was relatively low during most of the pollution periods,indicating a relatively high degree of air mass aging.The O3 pollution process in Jinshan District this time was mainly affected by the transmission of the marine backflow air mass,polluted air masses from Zhejiang Province in the southwest direction,and polluted air masses from Anhui Province in the northwest direction. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
