| 2022年6月衡水市一次臭氧污染个例成因分析 |
| Cause Analysis of a Case of Ozone Pollution in Hengshui City in June 2022 |
| 投稿时间：2024-12-27 修订日期：2025-11-28 |
| DOI：10.19316/j.issn.1002-6002.2026.02.17 |
| 中文关键词: 臭氧 后向轨迹分析 风廓线 通风量 |
| 英文关键词:ozone backward trajectory analysis wind profile ventilation index |
| 基金项目:河北省重点研发计划项目(20375407D);河北省气象局指导项目(23zc20) |
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| 中文摘要: |
| 为探究衡水市春夏季臭氧(O3)污染成因,利用实时监测数据和ERA5再分析数据对2022年6月衡水市一次O3污染过程的气象条件特征和潜在源区进行分析。研究发现:相对湿度低于50%、小时最高气温在30 ℃以上、风速较小(低于4 m/s)且主导风向为偏东-东南风是造成此次衡水市O3污染的重要影响因素;此次污染过程的O3潜在源区主要涉及城市为沧州、邢台、濮阳、德州、聊城、菏泽、济宁、天津和唐山,为衡水市O3联防联控重点关注城市;前期低层风速较小及稳定的天气形势、重污染当日整层下沉运动明显、低层风速小且风向转换频繁和高温低湿的气象条件均有利于此次重污染天气的产生;此次衡水市O3污染通风量阈值约为10×103 m2/s,整体气象扩散条件较为不利。 |
| 英文摘要: |
| In order to explore the causes of ozone pollution in Hengshui City during spring and summer,the meteorological conditions and potential source areas of an ozone pollution processepisode in Hengshui in June 2022 were analyzed by using real-time monitoring data and ERA5 reanalysis data.The results showed that:the relative humidity is less than below 50 %,the daily maximumpeak hourly temperatures is above 30 ℃,the wind speed is lows (less than below 4 m/s) and prevailing easterly to southeasterly winds the dominant wind direction is east-southeasterly wind,were significant contributing which is an important factors causing thise ozone pollution event in Hengshui City.The potential source areas of ozone in this pollution processepisode mainly involved the cities includingof Cangzhou,Xingtai,Puyang,Dezhou,Liaocheng,Heze,Jining,Tianjin and Tangshan,which are theshould be key cities for the joint prevention and control of ozone in Hengshui City.The meteorological conditions that favored this severe pollution event included low-level wind speeds in the lower atmosphere and stable weather situationpatterns in the precedingearly periodstage,the obvious sinking movement throughout the atmospheric columnof the whole layer on the day of severe pollution,frequent wind direction shifts with low wind speeds in the lower atmospherethe low-level wind speed and frequent wind direction conversion,andas well as the meteorological conditions of high temperatures and low humidity are all conducive to the occurrence of this heavy pollution weather.The ventilation threshold of this ozone pollution process in Hengshui City was approximatelyabout 10×103 m2/s,indicating generally unfavorable meteorological conditions for pollution dispersionand the overall meteorological diffusion conditions are unfavorable. |
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