石家庄市夏季臭氧污染近地层垂直变化特征  

Characterizing the Near-surface Vertical Variations of Summertime O_(3)in Shijiazhuang

作　　者：郭小璇 金龙[1] 刘宇[1] 姬艺珍 高珊珊 陈沛宇 代雅茹 幺伦韬[1] GUO Xiaoxuan;JIN long;LIU yu;JI Yizhen;GAO Shanshan;CHEN Peiyu;DAI Yaru;YAO Luntao(Hebei Provincial Meteorological Technical Equipment Center,Shijiazhuang,Hebei 050022,China;Tianshui Meteorological Bureau,Tianshui,Gansu 741000,China;Meteorological Observation Center,China Meteorological Administration,Beijing 100081,China)

机构地区：[1]河北省气象技术装备中心,河北石家庄050022 [2]天水市气象局,甘肃天水741000 [3]中国气象局气象探测中心,北京100081

出　　处：《环境监控与预警》2023年第5期58-64,共7页Environmental Monitoring and Forewarning

基　　金：中国气象局大气探测重点开放实验室联合基金开放课题(U2021M09)。

摘　　要：基于2022年6月1日—8月31日河北省石家庄市地面气象要素和臭氧(O_(3))观测数据,结合O_(3)激光雷达垂直探测数据分析近地层O_(3)垂直变化特征,并利用后向轨迹聚类分析法探讨其污染来源。结果表明:(1)2022年夏季石家庄O_(3)污染天数为6月>7月>8月。影响ρ(O_(3))变化的主要影响因子是气温,平均气温与ρ(O_(3))正相关,相对湿度与ρ(O_(3))负相关。(2)当探测高度≥2 km时,全天、日间、夜间的ρ(O_(3))变化较稳定,ρ(O_(3))均在100μg/m^(3)左右。近地层ρ(O_(3))差异最大,无论是日间还是夜间,ρ(O_(3))均在0.3 km左右达到峰值,之后逐渐降低。6月的ρ(O_(3))垂直变化速率较大,7、8月ρ(O_(3))垂直变化速率逐渐降低。(3)不同垂直高度下,石家庄夏季ρ(O_(3))日变化情况均成“单峰单谷”型,地面ρ(O_(3))日变化波动最明显,随着高度的上升ρ(O_(3))日变化情况趋于平缓。(4)后向轨迹聚类分析结果表明,距离地面10,500,1000 m高度层的O_(3)后向轨迹均呈散射状分布,距离地面10 m的O_(3)路径来源为河北西南部,距离地面500 m的O_(3)路径来源为河北南部,距离地面1000 m的O_(3)主要途经地点为内蒙古西南部、西北部和河北东北部。Based on the surface meteorological elements and ozone(O_(3))observation data of Shijiazhuang City,Hebei Province from June 1 to August 31,2022,the vertical change characteristics of O_(3)in the near ground were analyzed in combination with the O_(3)Lidar vertical detection data,and the pollution sources were discussed by backward trajectory clustering analysis.The results show that:(1)The O_(3)pollution days of Shijiazhuang in summer 2022 are June>July>August.The main influencing factor ofρ(O_(3))is the mean air temperature,and the two are positively correlated,while the relative humidity is negatively correlated withρ(O_(3)).(2)When the detection height is≥2 km,theρ(O_(3))changes steadily throughout the day,day and night,with the value about 100μg/m^(3).Near groundρ(O_(3))has the greatest difference,andρ(O_(3))peaks at about 0.3 km both during the day and at night,and then decreases gradually.Theρ(O_(3))change rate in June is large,and gradually decreases in July and August.(3)At different vertical heights,the diurnalρ(O_(3))variation of Shijiazhuang in summer all forms a“single peak and single valley”type,and the diurnalρ(O_(3))on the ground fluctuates most obviously.The diurnal change ofρ(O_(3))on the ground tends to be gentle with the rise of the height.(4)The clustering analysis results of backward trajectory show that the O_(3)backward orbits at 10,500 and 1000 m altitude from the ground are scattered.The source of the O_(3)path 10 m from the ground is southwest Hebei,and the source of the O_(3)path 500 m from the ground is southern Hebei.O_(3)which is 1000 m above the ground,mainly passes through southwest Inner Mongolia,northwest Inner Mongolia,and northeast Hebei.

关 键 词：臭氧激光雷达 臭氧 垂直变化 后向轨迹 石家庄 

分 类 号：X51[环境科学与工程—环境工程]