绿化带对城市大气环境及空气质量的影响  

The Impact of Greenbelt on Urban Atmospheric Environment and Air Quality

作　　者：范丽雅[1] 刘树华[1] 刘辉志[2] 桑建国[1] 

机构地区：[1]北京大学物理学院大气科学系,北京100871 [2]中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100029

出　　处：《气候与环境研究》2006年第1期85-93,共9页Climatic and Environmental Research

基　　金：国家自然科学基金资助项目40275004

摘　　要：采用北京大学城市大气边界层模式模拟了城区下风向绿化带对城市温度场、风场及空气质量的影响。模拟表明,一天中不同时刻绿化带附近存在不同程度的污染加重现象,上午10:00(北京时)污染浓度最大增加66%;绿化带降温范围最大达到下风向0.5 km。同时还进行了下风向绿化带与城区加强绿化的对比数值试验,结果表明,城区加强绿化后绝大部分范围气温出现较明显下降,最大降温幅度为1.6℃。此项研究可为园林及城市规划等部门提供参考。The impact of greenbelt at the downwind periphery of an urban area on urban atmospheric environment and air quality was simulated by using the Peking University Urban Atmospheric Boundary Layer Model. Three cases with different distribution of greenery patches were tested. The results show that the temperature Change caused by greenbelt may induce secondary circulation and pollution redistribution. After construction of the greenbelt, the pollution increase with maximum value of 66% at 1000 BT （Beijing Standard Time） is found. The scope of temperature drop of the greenbelt can only extend to 0. 5 km downstream. If the trees in the greenbelt are evenly distributed on the urban area, the drop of temperature will appear over the whole urban area with the maximum of 1.6℃ at the downwind area. The research may be beneficial to a better understanding of the effects of greenbelt on the urban environment and well designing urban greenbelt patches.

关 键 词：绿化带 污染浓度 热岛强度 热岛环流 次生环流 

分 类 号：P435[天文地球—大气科学及气象学]