北京边界层大气污染物的垂直廓线监测与分析  

Monitoring and analysis for vertical profiles of air pollutants in boundary layer of Beijing

作　　者：朱燕舞[1,2] 刘文清[2] 谢品华[2] 窦科[2] 秦敏[2] 司福祺[2] 

机构地区：[1]合肥工业大学化学工程学院,合肥230009 [2]中国科学院环境光学与技术重点实验室,中国科学院安徽光学精密机械研究所,合肥230031

出　　处：《地球物理学报》2010年第6期1278-1283,共6页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(40675072);国家高技术研究发展计划(863)项目(2006AA06A301)资助

摘　　要：基于扫描差分光学吸收光谱(DOAS)系统,于2007年8月27日～9月4日期间对北京市朝阳区大气污染物SO_2,HCHO,O_3和NO_2的垂直分布进行了连续监测,并对污染物垂直廓线进行了分析,详细探讨了SO_2垂直分布特征以及夜间NO对O_3的滴定作用.结果表明,SO_2浓度通常没有明显垂直分层分布特征,但在清晨风速较低时呈现负梯度变化.研究发现夜间O_3、NO和NO_2之间存在稳态作用,表明城市区域O_3的滴定主要来自于地面NO的直接排放,显示出NO的滴定作用对夜间O_3、NO和NO_2的垂直变化起到重要作用.Abstract Based on the scanning differential optical absorption spectroscopy （DOAS） system, vertical distribution of air pollutants （SO2, HCHO, 03 and NO2） were observed continuously from Aug 27, 2007 to Sep 4, 2007 in Chaoyang District of Beijing and their vertical profiles were analyzed. The typical vertical variation characteristic of SO2 and nocturnal NO titration to Oa were discussed. The results indicated that the gradient of SO2 was not obvious, and the negative gradient appeared during the morning hours when wind speed was low. The measurement also clearly showed the dominant role of NO titration for vertical variations of nocturnal chemistry in urban areas and O8 concentrations was mainly influenced by the direct emissions of NO.

关 键 词：扫描差分吸收光谱(DOAS) 垂直廓线 大气污染物 监测 

分 类 号：X83[环境科学与工程—环境工程] O433[机械工程—光学工程]