京津冀大气污染传输通道城市——鹤壁市臭氧污染特征及潜在源研究

Characteristics and Potential Sources of Ozone Pollution in Hebi which is A Transport Route City of Beijing—Tianjin—Hebei Air Pollution

为研究京津冀大气污染传输通道—鹤壁市O_(3)的污染传输特征,基于2019年3月—2022年2月的O_(3)浓度数据和气象监测数据,利用Meteolnfo软件对鹤壁市O_(3)污染特征及潜在源区进行了研究。结果表明鹤壁市四季O_(3)浓度呈现夏季最高、冬季最低的季节性特征;月均O_(3)浓度呈单峰型,6月污染最为严重;O_(3)浓度超标天数逐年减少。后向气流轨迹聚类分析表明,鹤壁市主要受到河南省的正南方向气团(29.90%~42.41%)与河北省南部、山东沿海地区的东北方向气团(24.88%~47.50%)的影响。潜在源贡献因子和浓度权重轨迹分析法结果表明,春夏O_(3)潜在源区分布范围最大,贡献高值区主要分布在河南境内与河北邯郸、邢台等地区,说明周边地区对鹤壁市O_(3)污染具有重要的贡献。

In order to study the Beijing—Tianjin—Hebei air pollution transmission channel—pollution transmission characteristics of O_(3)in Hebi City,based on the O_(3)concentration data and meteorological monitoring data from March 2019 to February 2022,the O_(3)pollution characteristics and potential source areas in Hebi City were studied by Meteolnfo software.The results showed that the O_(3)concentration was the highest in summer and the lowest in winter.The monthly average O_(3)concentration had a single peak,and the pollution was the most serious in June.The number of days decreased year by year when the O_(3)concentration exceeded the standard.The cluster analysis of the backward airflow trajectory showed that Hebi City was mainly affected by the southerly air mass(29.90%~42.41%)in Henan Province and the northeasterly air mass(24.88%~47.50%)from the southern Hebei Province and Shandong coastal areas.The results of the potential source contribution factor analysis and the concentration weighted trajectory analysis showed that the potential source area of O_(3)in spring and summer had the largest distribution range,and the high contribution area was mainly distributed in Henan and Handan,Xingtai,and other areas in Hebei,indicating that the surrounding areas have an important contribution to the O_(3)pollution in Hebi City.