基于MOPITT数据的北京奥运前后CO监测分析  

MOPITT-based Measurement and Analysis of CO Concentration Before and After Olympic Games in Beijing

作　　者：李令军[1] 

机构地区：[1]北京市环境保护监测中心,北京100048

出　　处：《大气与环境光学学报》2009年第4期274-282,共9页Journal of Atmospheric and Environmental Optics

摘　　要：利用MOPITT卫星资料及近地面监测数据,研究了奥运前后北京大气CO柱浓度及近地面质量浓度的分布及变化规律。发现:CO柱浓度反映了区域大气污染水平,而其近地面质量浓度主要受局地污染源排放的影响。大陆背景点瓦里关站CO柱浓度与近地面质量浓度季节变化较为相似,都以春季最高;而北京CO柱浓度与近地面质量浓度季节变化差异较大,CO柱浓度以春季最高,而近地面质量浓度采暖期明显高于非采暖期。2000～2007年8月北京大气CO柱浓度缓慢升高,而其近地面质量浓度呈显著下降趋势。2008年受奥运空气质量保障措施的影响,北京及周边五省市CO排放显著减少,大气中CO柱浓度及近地面质量浓度同时大幅度降低。北京CO柱浓度下降19.3%,而近地面浓度更是下降了46.7%。后者降幅更大,主要源于北京较周边省市采取了更大力度的空气质量保障措施。空气质量保障措施极大地减少了CO的总量排放,但未改变区域大气污染分布格局。The concentration distribution of CO in Beijing based on MOPITT data and instrumental dataset was analyzed. The results showed that CO column concentration reflected the contamination level of the territorial air pollution, and near-ground CO mass concentration was mainly due to local air pollution emission As for the continental background CO column concentration of Waliguan was similar to seasonal variations of near-ground mass concentration. CO column concentration reached its peak in spring, but mass concentration near the ground surface was higher during heating period when compared to no-heating period in Beijing. CO column concentration during August of 2000-2007 increased slowly but mass concentration near the ground surface decreased significantly in Beijing. Air cleaning measures taken during 2008 Beijing Olympic Games considerably reduced about 19.3% column concentration and 46.7% mass concentration of CO due to decreased emission of air pollutants from Beijing and its circumjacent regions. It can be concluded that the air cleaning measures greatly improved air quality, but the distribution of air pollution is still kept as it is.

关 键 词：北京 奥运会 污染控制措施 MOPITT CO 

分 类 号：X831[环境科学与工程—环境工程]