应用一改进的模式对北京夏季风、温和湿度场的模拟  

Simulation of Wind, Temperature and Humidity Fields over Beijing Area in Summer Using an Improved Model

作　　者：刘树华[1] 周彬[1] 

机构地区：[1]北京大学物理学院大气科学系,北京100871

出　　处：《北京大学学报（自然科学版）》2007年第1期42-47,共6页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：中国气象局气候变化专项经费(CCSF-2005-2-QH29);高等学校博士学科点专项科研基金(20050001030);国家自然科学基金(40275004)资助项目

摘　　要：对北京大学的三维复杂地形中尺度数值模式进行了适当改进,引入第2代陆面过程模式的参数化方案,在计算地表能量水分收支时更加注重植被的影响,根据植物生态和土壤的地理分布特征确定陆面参数。结果表明,改进后的模式在模拟夏季北京气温场、风场、湿度场时都取得令人满意的效果。模拟结果可为了解北京地区区域气候的形成、污染物的扩散及城市规划提供参考和帮助。The meso-seale urban atmospheric boundary layer model of Peking University, with three-dimensional complex topography, was improved by introducing the second generation land-surface model, which paid more attention to the effect of vegetable coverage when computing land-surface water balance. The improved model was used to simulate temperature, wind and humidity fields over Beijing in summer. It is found that the model can provide acceptable results compared with observations. The simulation results are important to understand the local climate over Beijing area and the feature of diffusion of pollutants, and are helpful for making practical urban design.

关 键 词：城市边界层模式 数值模拟 城市热岛 温度场 风场 湿度场 北京区域 

分 类 号：P463.3[天文地球—大气科学及气象学]