6种城市绿地空气PM2.5浓度变化规律的研究  

Variation of air PM2.5 concentration in six urban greenlands

作　　者：吴志萍[1] 王成[1,2,3] 侯晓静[1] 杨伟伟[1] 

机构地区：[1]国家林业局城市林业研究中心,北京100091 [2]中国林业科学研究院林业研究所,北京100091 [3]国家林业局森林培育重点实验室,北京100091

出　　处：《安徽农业大学学报》2008年第4期494-498,共5页Journal of Anhui Agricultural University

基　　金：国家科技部科研院所社会公益研究专项(2004DIB1J031);国家十一五科技支撑计划重大项目课题(2006BAD03A06)共同资助

摘　　要：为合理安排树木的种植和配置结构,发挥绿色植物在改善城市生态环境方面的重要功能,研究6种城市绿地空气PM2.5浓度的日变化规律、月变化规律,分析不同类型绿地空气PM2.5浓度差异以及不同天气条件下PM2.5浓度。结果表明:PM2.5浓度日变化和月变化规律明显,不同季节有显著差异;6种城市绿地空气PM2.5浓度在同一季节内没有显著差异,从均值来看,春、秋、冬季有乔木的绿地内空气PM2.5浓度较低,夏季草坪内空气PM2.5浓度较低;阴天颗粒物的浓度比晴天高45%,雨后阴天颗粒物的浓度比雨后晴天高426%,降水对PM2.5的清除作用在雨后晴天发挥的较好。In this paper,We researched the variation of PM2.5,the concentration difference in 6 types of urban greenlands and concentration change under different weather,aiming to reasonably design and plan urban trees,embodying their important roles in improving urban ecology environment.The results show as follows： there is remarkable daily and monthly variation of PM2.5 as well as significant seasonal difference.But there is no significant difference among different greenlands in the same season.The concentration of PM2.5 in greenlands with arbor trees is lower than that without arbor trees in spring,autumn and winter.The concentration of PM2.5 is less in herb than that of in any other greenlands in summer.The mean concentration of PM2.5 is 45% higher in cloudy days than that of in sunny days,and after raining,this number becomes 426%.So precipitation plays an important role on alleviating PM2.5 and this is significant in sunny days after raining.

关 键 词：城市绿地 PM2.5浓度 时间变化 

分 类 号：S731.2[农业科学—林学] X173[环境科学与工程—环境科学]