一次持续性极端高温背景下石家庄臭氧污染特征研究

Analysis of Ozone Pollution Characteristics inShijiazhuang Under Continuous High Temperature

利用地面常规观测大气成分数据、地面气象数据、臭氧激光雷达数据结合风廓线雷达和微波辐射计遥测资料,研究了2022年6月16-26日石家庄地区一次持续性极端高温天气过程背景下的臭氧重度污染过程。结果表明强辐照、高温、低湿、弱风的气象条件,有利于O_(3)的产生和积累;O_(3)日变化特征,峰值区出现在午后,谷值区出现在夜间-凌晨;地面O_(3)与温度(T)、相对湿度(RH)分别具有明显的正、负相关性,相关系数分别为0.68、-0.50;0.5 km^(-1)·km处臭氧浓度变化速率较快;地形和气象条件使得污染物易于太行山东侧生成并累积。

The severe ozone pollution process under the background of a continuous extreme high temperature weather in Shijiazhuang from June 16 to 26,2022 was studied by using the atmospheric composition data,ground meteorological data,ozone lidar data and wind profile radar and microwave radiometer telemetry data.The results show that the meteorological conditions of strong radiation,high temperature,low humidity and weak wind are conducive to the production and accumulation of O_(3).The diurnal variation of O_(3) is characterized by the peak area appearing in the afternoon valley area appearing in the night-am.Surface O_(3) has significant positive and negative correlation with T and RH,with correlation coefficients of 0.68 and-0.50 respectively.The change rate of ozone concentration at 0.5 km^(-1)·km is fast.The terrain and meteorological conditions make it easy for pollutants to be generated and accumulated in the east side of the Taihang Mountains.