【摘要】 20 0 1年 1月 5～ 1 2日 ,2月 2 1日～ 3月 1日两次在北京方庄居住小区内进行了大气污染物 (二氧化硫、氮氧化物 )与气象要素垂直探测 ,历时 1 6天。共获取了 83次 (一天 8次 )边界层垂直温、压、湿、风连续的探空资料以及不同高度 (地面、1 0 0m、5 0 0m)逐时大气污染物浓度监测数据 3 0 6个。该文分析了低空风日变化规律、时空分布规律、边界层气象条件对污染物垂直分布影响等等 ;并对 1月 1 2日、2月 2 7日两天高浓度污染日的天气特征、温度层结和低空风以及 2月 2 5～ 2 6日出现 1 0 0m浓度值高于地面现象都进行了详细分析。观测结果对于了解和研究北京地区冬季低层空气中环境化学污染物质在空中的垂直分布情况及随时间变化规律具有重要的参考价值更多还原

【Abstract】 Vertical measurement of atmospheric pollutants (SO 2 and NO x) and meteorological elements were conducted twice at Fangzhang Community, Beijing. The two measurement periods were from 5 to 12 January and 21 February to 1 March , 2001, lasting 16 days. The data from 83 rawinsonde observations of vertical temperature, pressure, humidity and wind in the boundary layer were acquired. Also, the hourly concentration data of atmospheric pollutants at different altitudes (surface, 100 m, 500 m) were obtained (306 in total). The impacts of daily variety, temporal and spatial distribution of low level wind and other meteorological conditions on the vertical distribution of atmospheric pollutants are analyzed. As the two typical days of high pollution, the weather conditions including temperature stratification and wind distribution at low levels on 12 January and 27 February are analyzed in detail. In addition, the possible reasons are discussed for the phenomenon that the concentration at the 100 m level was higher than that at ground on 25 and 26 February 2001. Therefore, the results of this observation are of great significance to the investigation on the vertical distribution and temporal variety of the surrounding chemical pollutants at low levels in winter in the Beijing area.更多还原