引用本文:郭小璇,金龙,刘宇,姬艺珍,高珊珊,陈沛宇,代雅茹,幺伦韬.石家庄市夏季臭氧污染近地层垂直变化特征[J].环境监控与预警,2023,15(5):58-64
GUO Xiaoxuan,JIN long,LIU yu,JI Yizhen,GAO Shanshan,CHEN Peiyu,DAI Yaru,YAO Luntao.Characterizing the Near surface Vertical Variations of Summertime O3 in Shijiazhuang[J].Environmental Monitoring and Forewarning,2023,15(5):58-64
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石家庄市夏季臭氧污染近地层垂直变化特征
郭小璇1,金龙1,刘宇1,姬艺珍2,高珊珊1,陈沛宇1,代雅茹3,幺伦韬1 *
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
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(O3)观测数据,结合O3激光雷达垂直探测数据分析近地层O3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O3污染天数为6月>7月>8月。影响ρ(O3)变化的主要影响因子是气温,平均气温与ρ(O3)正相关,相对湿度与ρ(O3)负相关。(2)当探测高度≥2 km时,全天、日间、夜间的ρ(O3)变化较稳定,ρ(O3)均在100μg/m3左右。近地层ρ(O3)差异最大,无论是日间还是夜间,ρ(O3)均在0.3 km左右达到峰值,之后逐渐降低。6月的ρ(O3)垂直变化速率较大,7、8月ρ(O3)垂直变化速率逐渐降低。(3)不同垂直高度下,石家庄夏季ρ(O3)日变化情况均成“单峰单谷”型,地面ρ(O3)日变化波动最明显,随着高度的上升ρ(O3)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10,500,1 000 m高度层的O3后向轨迹均呈散射状分布,距离地面10 m的O3路径来源为河北西南部,距离地面500 m的O3路径来源为河北南部,距离地面1 000 m的O3主要途经地点为内蒙古西南部、西北部和河北东北部。
关键词:  臭氧激光雷达  臭氧  垂直变化  后向轨迹  石家庄
DOI:10.3969/j.issn.1674-6732.2023.05.009
分类号:X51
基金项目: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)
Characterizing the Near surface Vertical Variations of Summertime O3 in Shijiazhuang
GUO Xiaoxuan1, JIN long1, LIU yu1, JI Yizhen2, GAO Shanshan1, CHEN Peiyu1, DAI Yaru3, YAO Luntao1*
1.Hebei Provincial Meteorological Technical Equipment Center, Shijiazhuang, Hebei 050022, China;2.Tianshui Meteorological Bureau, Tianshui, Gansu 741000, China; 3.Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China
Abstract:
Based on the surface meteorological elements and ozone (O3) observation data of Shijiazhuang City, Hebei Province from June 1 to August 31, 2022, the vertical change characteristics of O3 in the near ground were analyzed in combination with the O3 Lidar vertical detection data, and the pollution sources were discussed by backward trajectory clustering analysis. The results show that: (1) The O3 pollution days of Shijiazhuang in summer 2022 are June > July > August. The main influencing factor of ρ(O3) is the mean air temperature, and the two are positively correlated, while the relative humidity is negatively correlated with ρ(O3). (2) When the detection height is ≥2 km, the ρ(O3) changes steadily throughout the day, day and night, with the value about 100 μg/m3. Near ground ρ(O33) has the greatest difference, and ρ(O3) peaks at about 0.3 km both during the day and at night, and then decreases gradually. The ρ(O3) change rate in June is large, and gradually decreases in July and August. (3) At different vertical heights, the diurnal ρ(O3) variation of Shijiazhuang in summer all forms a “single peak and single valley” type, and the diurnal ρ(O3) on the ground fluctuates most obviously. The diurnal change of ρ(O3) on the ground tends to be gentle with the rise of the height. (4) The clustering analysis results of backward trajectory show that the O3 backward orbits at 10, 500 and 1 000 m altitude from the ground are scattered. The source of the O3 path 10 m from the ground is southwest Hebei, and the source of the O3 path 500 m from the ground is southern Hebei. O3 which is 1 000 m above the ground, mainly passes through southwest Inner Mongolia, northwest Inner Mongolia, and northeast Hebei.
Key words:  Ozone lidar  Ozone  Vertical change  Backward trajectory  Shijiazhuang