庆阳市2022年夏季一次臭氧污染过程的气象成因及潜在源区研究

蔡晓倩; 王鹏波; 周佳; 安伟铭; 潘峰

doi:10.13205/j.hjgc.202510027

庆阳市2022年夏季一次臭氧污染过程的气象成因及潜在源区研究

doi: 10.13205/j.hjgc.202510027

1. 兰州大学大气科学学院, 兰州 730000;
2. 中国石油天然气股份有限公司长庆油田分公司第二采油厂, 甘肃庆阳 745000

详细信息

作者简介:
蔡晓倩（2001—），女，硕士研究生，主要研究方向为大气物理与环境。2505594426@qq.com

通讯作者:
潘峰（1968—），男，教授，主要研究方向为空气污染与环境评价。panfeng@lzu.edu.cn

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出版历程
- 收稿日期: 2024-03-05
- 录用日期: 2024-05-09
- 修回日期: 2024-04-20
- 网络出版日期: 2025-12-03
- 刊出日期: 2025-10-01

Meteorological causes and potential source areas analysis of ozone pollution process in Qingyang： a case study in summer of 2022

1. College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;
2. The Second Oil Production Plant, Changqing Oilfield Branch, PetroChina Company Limited, Qingyang 745000, China

摘要

摘要: 基于2022年陇东大型能源化工基地核心区庆阳市的臭氧超标天数陡增的情况，选取2022年6月23—25日为典型臭氧污染过程，基于WRF模式和HYSPLIT4模式，结合污染特征、地形地势等分析了其气象成因及臭氧潜在源区，以期为陇东黄土塬区臭氧污染治理提供参考。研究结果表明：1）6月24日庆阳市高空处于槽后，气流下沉，不利于污染物垂直扩散，日间最大臭氧8 h浓度达到174.5 μg/m³；6月25日凌晨臭氧小时浓度出现高值，主要受南风和下沉气流影响。2）污染期间PM_2.5浓度整体较低，可能受加速的光化学反应影响，6月24，25日PM_2.5浓度整体上升；6月24日充足的NO₂加速了本地O₃生成。3）从气象因素看，庆阳市O₃浓度受相对湿度影响最大，其次是温度和气压。4）气团轨迹聚类和潜在源区分析结果表明，关中平原区域污染传输和本地生成是庆阳市本次臭氧污染的主要原因，污染传输贡献更大。研究为陇东地区开展臭氧污染治理提供了关键科学依据。
- 庆阳 /
- 臭氧 /
- WRF模式 /
- 气象成因 /
- HYSPLIT4模式 /
- PSCF分析
Abstract: In 2022， the number of days with ozone exceeding the standard in Qingyang， the core area of Longdong large-scale energy and chemical base， increased sharply. In this paper， a typical ozone pollution process last from June 23rd to 25th was selected as the case. Based on the WRF model and HYSPLIT4 model， the meteorological causes and potential ozone source areas were analyzed in combination with pollution characteristics and topography， to provide a reference for ozone pollution control in the Loess Plateau of Longdong. The results showed that： 1） On June 24th， the high altitude of Qingyang was behind the trough， and the airflow sank， which was not conducive to the vertical diffusion of pollutants. The maximum concentration of O₃_8 h reached 174.5 μg/m³ during the day； in the early morning of June 25th， the phenomenon of high O₃ concentration occurred， which was mainly influenced by the south wind and downward flow. 2） During the pollution period， the overall concentration of PM_2.5was low， but on June 24th and 25th， the overall concentration of PM_2.5 increased， which may be affected by the accelerated photochemical reaction. On June 24th， sufficient NO₂ accelerated the local O₃ production. 3） According to meteorological factors， the concentration of O₃ in Qingyang was most affected by relative humidity， followed by temperature and air pressure. 4） The results of air mass trajectory clustering and potential source analysis show that the regional pollution transmission and local generation in Guanzhong Plain are the main reasons for this ozone pollution in Qingyang， and the pollution transmission contributes more.
- Qingyang /
- ozone /
- WRF mode /
- meteorological cause /
- HYSPLIT4 model /
- PSCF analysis

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