【摘要】 利用实施北京市奥运空气质量保障计划"北京市与周边地区空气污染物的输送、转化及北京市空气质量目标研究"项目的有利时机,2006年8月对北京城区空气污染物进行加强观测。文章利用SO2、NO2和O3等污染气体的差分吸收光谱仪(DOAS)的观测数据,初步分析这些污染气体的变化特征,得到了一些有价值的结果:2006年8月空气质量总体较好,但NO2和O3小时平均浓度有时超标;北京8月份主导风向是东南风,空气对流活动及降水可明显降低大气中的污染物浓度;NO2污染主要来自局地污染源排放,O3污染来自光化学反应和大气输送;DOAS观测结果与北京市环境保护局发布的空气污染指数间具有比较好的一致性。更多还原

【Abstract】 Taking the advantage of implementing the project of the Transportation and Transformation of Air Pollutants in Beijing and Its Surrounding Areas and the Objective of Air Quality in Beijing,which is of the program of air quality assurance for Beijing 2008 Olympic Games,intensive observations were done for air quality of Beijing in August,2006.Some valuable results were derived from primary analysis on variations of SO2,NO2 and O3 concentrations measured by using DOAS.Air quality was good in general,but hourly-mean concentrations of NO2 and O3 were over the state criterion sometimes.The dominant wind direction of Beijing was southeast wind in August,the air convection and precipitation could decrease the concentrations of pollutants in the air remarkably.NO2 pollution came mainly out of local sources,while O3 pollution both from photochemistry reaction and atmospheric transport.A good consistency was found between DOAS measurements and API data from Beijing Environmental Protection Administration for SO2,NO2 and O3.更多还原