【作者】 谢军飞； 李延明； 韩丽莉； 郭佳； 桑建国；

【Author】 Junfei Xie1,Li yanming1,Han lili1,Guo jia1,Jianguo Sang2 (1. Beijing Institute of Landscape Gardening,Beijing,P.R. China) (2. Department of Atmospheric Sciences,School of Physics,Peking University,Beijing)

【机构】 北京市园林科学研究所； 北京大学物理学院大气科学系；

【摘要】 为了科学评价绿地生态功能,以及更好地服务于绿地建设的生态功能优化设计,本文建立了一个城市小尺度气象数值模式,该数值模式主要采用三维准静力大气动力学和热力学方程组及ε-k湍流闭合方案,引入有效空气体积比和形式阻力描述建筑群对气流的作用,同时考虑冠层内的能量平衡,并对天坛公园的风场、温度场进行了模拟验证。其模拟结果能较好地反映出天坛公园区域风速和温度场的基本特征,即城市绿地在一定程度上可降低风速,并能明显降低周围温度。更多还原

【Abstract】 In order to better evaluate the ecological function of urban vegetation,and be served for ecological optimized design for urban vegetation construction,the small scale meteorology numerical model has been established,which adopts three dimensional quasi-hydrostatic atmospheric dynamic and thermodynamic equations and ε-k turbulence closure,in which two concepts--effective air volume ratio and form drag are introduced to describe the effect of buildings,at the same time the energy budget in the model are taken into account,and the model can well describe the basic characteristics for wind and temperature fields over Tiantan park. the simulation show urban vegetation can obvious decrease wind speed and air temperature in some range.更多还原