【摘要】 本研究基于2023年7月21日—8月21日北京市气象监测资料、北京市生态环境局33个大气监测站点的臭氧（O₃）数据，分析研究期间北京市O₃污染特征，并讨论O₃生成的影响因素。结果表明：研究期间，北京市城区的O₃浓度较高，污染持续时间更长，而郊区相对浓度较低；O₃污染过程中，O₃浓度与NO₂浓度变化的相关系数为负值；当环境温度介于29～32℃、相对湿度介于25%～60%时，O₃超标概率会大幅升高；随着日最高温度增加，O₃浓度水平的升高趋势逐渐减慢，O₃浓度与日最高辐射量呈现显著的正相关关系。距地面越高，后向轨迹气团的传输距离越长，在100 m、500 m和1 000 m高度上，北京市O₃污染物的主要传输方向来自京津冀南部和东南部。更多还原

【Abstract】 This study utilizes meteorological monitoring data collected from July 21 to August 21,2023,in Beijing,alongside ozone （O₃）data from 33 atmospheric monitoring stations managed by the Beijing Environmental Protection and Ecological Environment Bureau.It examines the characteristics of O₃ pollution in Beijing during this period and discusses the influencing factors of O₃ generation.The results indicated that during the study period,O₃ concentrations in Beijing’s urban areas were higher with longer durations of pollution,whereas suburban concentrations were comparatively lower;Throughout the O₃pollution episodes,variations in O₃ concentration negatively correlated with NO₂ concentration;The probability of O₃ exceeding acceptable standards significantly increases when the ambient temperature ranges from 29℃to 32℃and the relative humidity ranges from 25%to 60%;As the daily maximum temperature rises,the increasing trend of O₃ concentration levels gradually decelerates,and a significant positive correlation is observed between O₃concentration and daily maximum radiation.The higher above ground,the greater the transport distance of the air mass following a backward trajectory.At heights of 100 m,500 m,and 1 000 m,the primary source of O₃ pollutants in Beijing is from the southern and southeastern parts of the Beijing-Tianjin-Hebei region.更多还原