人为热排放的引入对北京地区精细模拟的改进

The Improvement in Model Simulations of the Atmospheric Condition in Beijing with Consideration of Anthropogenic Heat

将人为热排放纳入到已耦合城市模块Urban Canopy Model(UCM)的中尺度气象模式Weather Research and Forecasting(WRF)中,探讨了人为热排放对于北京地区精细化模拟的重要意义,其影响主要体现在以下几个方面:1)可有效改善气象要素的模拟效果,特别是对于大气边界层高度的显著性改善,该变量是控制空气质量模式中污染物垂直扩散的关键因子;2)可较好地再现城区流场及温度场,使热岛强度和中心配置更接近实况;3)可明显改善数值模式对于污染物垂直分布特征的模拟。

Anthropogenic heat（AH） was considered in the Weather Research and Forecasting（WRF） model that is coupled with the urban canopy model（UCM） to investigate its effects on model simulations of the atmospheric condition in Beijing. Results indicated that： 1） The consideration of AH can significantly improve the simulation of meteorological variables, especially in the simulation of the boundary layer height, which is a key factor that determines the vertical dispersion of pollutants in air quality models; 2） The model can better reproduce the spatial patterns of wind and temperature fields with the consideration of AH; 3） The vertical distribution of pollutants in the model simulation is also improved with the consideration of AH.