摘要
给出了 2 0 0 1年 2月 2 6～ 2 8日在北京市方庄小区用系留气艇观测大气边界层O3垂直分布的结果。结合相关资料 ,对边界层O3的变化机制进行了初步分析。研究表明 ,冬季边界层O3主要受边界层气象条件、尤其是逆温层的影响比较大。在逆温层以下O3都维持极低值分布 ,超过仪器所能观测的最低极限。在逆温层向自由大气过渡的高度区域 ,O3浓度明显的梯度变化与风速垂直切变有关。观测还表明冬季城市市区大量排放的氮氧化物。
Ozone vertical profiles in the Boundary layer over the Fanzhuan residential area, Beijing, observed by tethersonde during the period of 26-28 February 2001, are given. Preliminary analysis on the variations of ozone vertical distribution in the boundary layer has been made by means of the related data sets. The work suggests that meteorological condition, especially the temperature inversion layer is the one of main influencing mechanisms on ozone variation in the boundary layer. Below the temperature inversion layer, ozone generally keeps in low concentration and is beyond the detectable level of the instrument. In the transitional area from the boundary layer to the free atmosphere, the obvious ozone gradient is associated with the vertical shear of wind speed. Additional atmospheric chemical observations indicate that chemical reactions are involved with NO x emitted from the city, and water vapor is also important for ozone variation in the urban region.
出处
《应用气象学报》
CSCD
北大核心
2002年第U01期100-108,共9页
Journal of Applied Meteorological Science
基金
<国家重点基础研究发展规划>项目 :首都北京及周边地区大气
水
土环境污染机理与调控原理 (项目编号 :G1 9990 4 5 70 0 )资助
