北京夏季SO2-NO2-O3的DOAS观测结果及变化特征  

Characteristics of SO_2-NO_2-O_3 in Summer of Beijing from DOAS Measurement

作　　者：孟晓艳[1,2] 王普才[1] 王庚辰[1] 余环[1,2] 

机构地区：[1]中国科学院大气物理研究所中层大气与全球环境探测开放实验室,北京100029 [2]中国科学院研究生院,北京100049

出　　处：《环境科学与技术》2009年第5期96-99,114,共5页Environmental Science & Technology

基　　金：北京市科学委员会大气污染控制专项基金(Z005190042791);国家重点基础研究发展计划项目资助(2006CB403702)

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。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.

关 键 词：差分吸收光谱仪(DOAS) 空气污染 SO2 NO2 O3 

分 类 号：X511[环境科学与工程—环境工程]