主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2024, Vol. 40 ›› Issue (6): 28-34.doi: 10.3969/j.issn.1673-503X.2024.06.004

• 论文 • 上一篇    下一篇

2014—2021年泰安市PM2.5和O3复合污染特征及其气象成因分析

栾兆鹏1,2(),卢慧超1,2,史俊南1,2   

  1. 1. 山东省气象防灾减灾重点实验室,山东济南 250031
    2. 泰安市气象局,山东泰安 271000
  • 收稿日期:2023-10-17 出版日期:2024-12-28 发布日期:2025-01-21
  • 作者简介:栾兆鹏,男,1990年生,工程师,主要从事空气质量观测模拟研究,E-mail: luanzp2014@163.com
  • 基金资助:
    中国气象局复盘总结专项(FPZJ2023-075);山东省气象局面上项目(2023sdqxm12);山东省气象局引导类项目(2022SDYD18);山东省气象局引导类项目(2023SDYD24)

Analysis of compound pollution characteristics of PM2.5 and O3 and their meteorological causes in Tai′an city from 2014 to 2021

Zhaopeng LUAN1,2(),Huichao LU1,2,Junnan SHI1,2   

  1. 1. Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shandong, Jinan 250031, China
    2. Tai′an Meteorological Bureau, Tai′an 271000, China
  • Received:2023-10-17 Online:2024-12-28 Published:2025-01-21

摘要:

选用2014—2021年泰安市地面气象观测资料、大气污染物监测资料及欧洲中期数值预报中心(ECMWF)提供的ERA5资料,分析该地区的PM2.5和O3复合污染特征、气象成因及复合污染期间PM2.5与O3的相互作用。结果表明:泰安市PM2.5和O3复合污染严重,月超标小时数为单峰型分布,具有显著的季节变化特征,气温和相对湿度较高、风速较小条件下更易发生PM2.5和O3复合污染。应用PCA与K均值聚类法将泰安市复合污染天气分为高压后部型、均压场型、鞍型场型、弱低压前部型、高压底部型5种类型,其中,高压后部型发生复合污染频率最高。泰安市PM2.5和O3相互作用分析表明,冬季、夏季二者均存在显著相关,夏季的大气氧化性以O3的氧化作用为主,不同强度光化学水平下的大气PM2.5浓度贡献率均为一次排放大于二次生成;冬季的大气氧化性较弱,随PM2.5浓度增大,太阳直接辐射减弱,O3峰值浓度减小,表明PM2.5对O3的生成存在一定的抑制作用。

关键词: 复合污染, 气象因素, 天气类型

Abstract:

Based on surface meteorological observation data, air pollutant monitoring data from 2014 to 2021 in Tai′an city, and ERA5 reanalysis data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF), this study analyzes the characteristics of PM2.5 and O3 compound pollution, the meteorological causes, and the interactions between PM2.5 and O3 during compound pollution periods in this region.The results show that compound pollution by PM2.5 and O3 is a significant issue in Tai′an city, with monthly exceedance hours showing a unimodal distribution and significant seasonal variation characteristics.The compound pollution is more likely to occur under conditions of high temperature, high relative humidity, and low wind speed.Using Principal Component Analysis (PCA) and K-means clustering methods, the weather patterns associated with compound pollution in Tai′an city are classified into five types: rear of high pressure type, uniform pressure field type, saddle field type, front of weak low pressure type, and bottom of high pressure type, with the rear of high pressure type showing the highest frequency of compound pollution occurrence.Analysis of the interactions between PM2.5 and O3 in Tai′an city indicates significant correlations in both winter and summer.In summer, atmospheric oxidation is dominated by O3 oxidation, and the contribution rate of atmospheric PM2.5 concentration under various photochemical intensity levels shows that primary emissions surpass secondary formation.In winter, with weak atmospheric oxidation, increasing PM2.5 concentrations, lead to reduced direct solar radiation and decreased O3 peak concentrations, indicating that PM2.5 has an inhibitory effect on O3 formation.

Key words: Compound pollution, Meteorological factors, Weather patterns

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