摘要
2002～2008年,北京市城区和近郊8月的NO2月均浓度大体呈现逐年下降趋势,其中前5年二者均以每年约10%的降幅下降,2008年发生显著下降,降幅达40%左右。利用嵌套网格空气质量模式系统(NAQPM/IAP),采用敏感性试验方法,评估了气象条件与污染控制措施对北京奥运会期间大气NO2浓度降低的影响,评估不同污染控制措施对NO2浓度降低的作用。研究结果表明,污染控制措施是NO2浓度降低的主要影响因素,其中面源的污染控制措施对于NO2浓度降低的作用最明显。
Monthly mean NO2 concentrations in both urban and suburban areas of Beijing generally decreased in August from 2002 to 2008,with a decreasing rate of about 10% during the first five years and nearly 40% in 2008.Based on sensitivity studies with a Nested Air Quality Prediction Modeling System（NAQPM/IAP）,quantitative assessments of the impacts of weather conditions and pollutant controlling measures on decreases in NO2 concentrations were made during Beijing Olympic Games in 2008.The impact of area and point emission controlling measures on NO2 concentrations was compared.The results indicates that pollutant controlling measures play a key role in decreases in NO2 concentrations during Beijing Olympic Games while the August weather condition in 2008 is more favorable for dispersion and scavenging of air pollutants compared with that in 2006.Area emission controlling measures are more effective than point emission controlling measures for decreases in NO2 concentrations.
出处
《气候与环境研究》
CSCD
北大核心
2010年第5期609-615,共7页
Climatic and Environmental Research
基金
北京市科委重大项目"北京及近周边区域大气复合污染形成机制及防控措施研究示范"课题"区域大气污染模拟
预测
预警与示范"
北京市重点学科项目(大气物理学与大气环境)研究生科学创新研究和社会实践资助专项
关键词
NO2嵌套网格空气质量模式系统
污染控制措施
北京奥运会
NO2
pollutant controlling measures
Nested Air Quality Prediction Modeling System（NAQPMS/IAP）
Beijing Olympic Games
