一次光化学污染过程中O3和NOx的垂直梯度观测研究  

Studies on gradient observation of O_3 and NO_x in an atmospheric photochemical pollution

作　　者：汪伟峰[1,2,3] 朱彬[1,4] 王跃思[2] 安俊琳[1,2] 于文鹏[2] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,南京210044 [2]中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100026 [3]宁波市环境监测中心,宁波315012 [4]南京信息工程大学大气物理与大气环境重点实验室,南京210044

出　　处：《环境工程学报》2010年第2期411-416,共6页Chinese Journal of Environmental Engineering

基　　金：教育部留学回国人员科研启动基金资助项目;中国科学院大气物理研究所(LAPC-KF-2006-09);国家杰出青年科学基金项目(40525016);中国科学院知识创新工程重大研究项目(KZCX1-YW-06-01)

摘　　要：为了研究2008年北京奥运会前期污染物浓度变化特征,对北京气象塔3层高度上的大气污染物（NO2和O3）进行加强观测,分析其变化特征。观测结果表明,由于北京奥运会前期采取了严格的空气质量控制措施,NO2浓度相对车辆限行前下降了45.3%,且随着高度递增逐渐降低;O3浓度最大值和日均值有所降低,其最大值出现时间较10年前提前了12 h,且有4 h左右处于相对平稳状态。O3浓度峰值主要是受NO2的控制,O3浓度峰值出现时间提前反映出北京大气氧化效率不断提高。对于观测期间出现光化学污染事件,利用同期气象资料和大气污染监测数据分析,发现造成这次大气污染的主要原因是气象因子：地面多处于弱高压场控制中,大气层结稳定,风力较弱（小于2 m/s）,并伴随着连续高温、强辐射和低湿。In order to study atmospheric pollution concentration changes during the 2008 Olympic Games in Beijing,atmospheric pollutants（NO2 and O3） at 3 altitude levels of Beijing meteorological tower were observed,and their variations were analyzed.The results indicate that by the strict measures for improving the air quality before Olympic Games,NO2 concentration reduced by 45.3% and decreased gradually with the increasing height;both the maximum of O3 concentrations and the daily average O3 concentrations decreased.The appearance time of O3 maximum concentration was brought forward about 1～2 h than 10 years ago,and kept stably around 4 h. The O3 peak concentrations were mainly influenced by NO2.The O3 concentration peak appeared ahead of schedule,which showed that Beijing atmospheric oxidation efficiency continued to increase.According to the analysis meteorological data and atmospheric pollution monitoring data the meteorological factors for photochemical pollution event were found as follows： weak-field control of high-voltage,stable atmospheric stratification,weaker wind force（the wind velocity was less than 2 m/s）,and accompanied by a continuous high temperature,strong radiation and low humidity.

关 键 词：北京奥运会 臭氧 氮氧化物 梯度观测 

分 类 号：X5[环境科学与工程—环境工程]