生态环境学报 ›› 2025, Vol. 34 ›› Issue (5): 720-730.DOI: 10.16258/j.cnki.1674-5906.2025.05.006

• 研究论文【环境科学】 • 上一篇    下一篇

基于不同类型臭氧污染日的臭氧污染特征及影响因素分析:以亳州市为例

张丹丹1,2(), 毋振海2, 吴渴2,3, 毕方2, 李云凤1, 安聪2, 韩翼昕2,4, 刘正阳2,4, 朱玲1,*(), 王学中2,*()   

  1. 1.北京石油化工学院环境工程系,北京 102617
    2.中国环境科学研究院/环境基准与风险评估国家重点实验室,北京 100012
    3.长江大学化学与环境工程学院,湖北 荆州 434023
    4.长江大学资源与环境学院/油气地球化学与环境湖北省重点实验室,湖北 武汉 430100
  • 收稿日期:2024-10-13 出版日期:2025-05-18 发布日期:2025-05-16
  • 通讯作者: *朱玲。E-mail: zhuling75@bipt.edu.cn;王学中。E-mail: wangxz@craes.org.cn
  • 作者简介:张丹丹(2000年生),女,硕士研究生,主要从事大气复合污染特征及成因分析。E-mail: zdd1841501728@126.com
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项(2023YSKY-14);亳州市大气“一市一策”技术支撑项目(BZSJ2022CG111)

Characterization of Ozone Pollution and Influencing Factors Based on Different Types of Ozone Pollution Days: A Case Study in Bozhou City

ZHANG Dandan1,2(), WU Zhenhai2, WU Ke2,3, BI Fang2, LI Yunfeng1, AN Cong2, HAN Yixin2,4, LIU Zhengyang2,4, ZHU Ling1,*(), WANG Xuezhong2,*()   

  1. 1. Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102627, P. R. China
    2. State Key Laboratory of Environmental Criteria and Risk Assessment/Chinese Research Academy of Environmental Sciences, Beijing 100012, P. R. China
    3. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China
    4. Hubei Key Laboratory of Petroleum Geochemistry and Environment (Yangtze University), Wuhan 430100, P. R. China
  • Received:2024-10-13 Online:2025-05-18 Published:2025-05-16

摘要: 为了解不同类型O3污染日关键O3前体物和气象因素差异及其影响,在研究2017-2022年中国重点区域不同类型O3污染日O3污染特征的基础上,以苏皖鲁豫交界地区典型城市亳州市为例,分析了不同类型O3污染日下O3前体物和气象因素变化特征及差异;同时,通过相关性分析、后向轨迹、随机森林等方法研究了O3污染气象条件、气团来源,及前体物与气象因素影响大小。结果表明,1)O3高值超标(O3质量浓度小时值和日最大8 h均值均超标)和O3低值超标(O3质量浓度小时值不超标,但日最大8 h均值超标)天数的占比与其前体物质量浓度的高低整体呈现一致的变化关系;NO2质量浓度日均值在30-40 μg·m−3区间时,O3高值超标日占比高达71.4%;CO质量浓度日均值<0.4 mg·m−3时,O3低值超标日占比为83.3%。2)O3污染状态与气象条件较为密切。当日均气温在35 ℃以下时,气温的升高有利于O3质量浓度的升高且高值超标天数出现频率占比呈增加趋势;当相对湿度在50%-60%区间时,更有利于O3高值超标天的出现;当相对湿度在60%-70%区间时,更有利于O3低值超标天的出现。3)O3高值超标日受西北和东南气团影响较大,低值超标日受南部和东北方向气团影响较大。4)随机森林分析结果表明,O3高值超标日相对湿度(40.9%)和气温(26.4%)影响较大;O3低值超标日相对湿度(30.4%)和NO2(26.0%)影响较大。

关键词: O3高低值超标, 前体物, 气象因素, 后向轨迹, 随机森林, 亳州市

Abstract:

Identifying the key influencing factors for different types of ozone (O3) pollution days is of great significance for the effective implementation of O3 pollution control measures. To elucidate the discrepancies in key precursors and meteorological factors influencing days with different types of O3 pollution, this study analyzed the pollution characteristics of different types of O3 pollution days in key regions from 2017 to 2022. Bozhou City, located at the intersection of Jiangsu, Anhui, Shandong, and Henan provinces, was selected as a typical subject to analyze the variation characteristics and differences in precursors and meteorological factors under different types of O3 pollution days. Additionally, correlation analysis, backward trajectory, and random forest methods were utilized to assess the meteorological conditions of O3 pollution, origins of air masses, and magnitude of influence of precursors and meteorological factors. The results showed the following: 1) The increase in precursor concentrations was positively correlated with the proportion of days with high O3 exceedances (both the hourly O3 mass concentrations and daily maximum 8-hour average O3 mass concentrations exceeded the standards) and low O3 exceedances (the hourly O3 mass concentrations exceeded the standard, and the daily maximum 8-hour average O3 mass concentrations did not exceed the standard). When the daily NO2 concentration was between 30 and 40 μg·m−3, the proportion of days with high O3 exceedance reached 71.4%. When the daily average concentration of CO was less than 0.4 mg·m−3, the proportion of days with low O3 exceedances was 83.3%. 2) The status of O3 pollution is closely related to meteorological conditions. When the daily average temperature was below 35 ℃, the increase in temperature was conducive to an increase in the O3 concentration, and the frequency of high-value exceedance days tended to increase. When the relative humidity was in the range of 50%-60%, the occurrence of high O3 exceedance days was more favorable. When the relative humidity was in the range of 60%-70%, the occurrence of low O3 exceedance days was more favorable. 3) Days with high O3 exceedances were significantly influenced by air masses from the northwest and southeast, whereas days with low O3 exceedances were more affected by air masses from the south and northeast. 4) Random forest results showed that for high O3 exceedance days, the relative humidity (40.9%) and temperature (26.4%) had significant effects. For days with low O3 exceedances, the relative humidity (30.4%) and NO2 (26%) had significant effects.

Key words: O3 high and low value exceedance, precursors, meteorological factors, backward trajectory, random forest, Bozhou City

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