城市化对珠江三角洲热岛效应影响的模拟  

A Simulation about the Impact of Urbanization on the Urban Heat Island in the Pearl River Delta Region

作　　者：麦健华[1] 罗乃兴[1] 赖文锋[1] 林文实[1] 

机构地区：[1]中山大学环境科学与工程学院,广州510275

出　　处：《热带地理》2011年第2期187-192,共6页Tropical Geography

基　　金：国家重点基础研究发展规划项目(2010CB428504)

摘　　要：利用新一代中尺度数值模式WRF以及其耦合的单层城市冠层模型(UCM),设计了3个模拟试验,以探讨下垫面改变以及引入人为热源对珠三角热岛效应的影响。结果表明:城市下垫面以及人为热排放均加强了该地区的城市热岛效应,而敏感性试验表明,下垫面的改变引起的城市地区增温幅度比引入人为热源的增温幅度相对要大。另外,珠三角城市区域为明显的感热通量大值中心和潜热通量小值中心,其表现出的总效果是使城市地区温度比其他地区要高,该地区的城市热岛效应主要是由感热通量决定的。In order to evaluate the impacts of the change of land cover and anthropogenic heat（AH） on the urban heat island in the Pearl River Delta（PRD） region,three simulation experiments are conducted by using a mesoscale model WRF coupled with the single-layer urban canopy model.The results show that both the urban land cover and AH can enhance the intensity of the urban heat island over the PRD,and the sensitivity experiments show that the increase of surface temperature due to the change of the urban land cover is relatively more evident than that of AH.In addition,the sensible heat flux is big in the urban area of the PRD while the latent heat flux is small,that indicates that the urban heat island in the PRD is mainly decided by the sensible heat flux.

关 键 词：城市化 热岛效应 下垫面 人为热源 

分 类 号：P435[天文地球—大气科学及气象学]