城市化对南京气候影响的数值模拟研究  

Numerical Simulation Study on Climate Impacts of Urbanization in Nanjing

作　　者：赵酉龙 周顺武[1] 郑丹 罗俊伟 廖镜彪[4] 刘璞 Zhao Youlong;Zhou Shunwu;Zheng Dan;Luo Junwei;Liao Jingbiao;Liu Pu(Key Laboratory of Meteorological Disaster,Ministry of Education (KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster(CIC-FEMD)/Joint International Research Laboratory of Climate and Environment Change(ILCEC),NUIST,Nanjing 210044,China;Jinzhong Meteorological Office,Jinzhong 030600,China;Xinzhou Meteorological Office,Xinzhou 034000,China;School of Atmospheric Science of Nanjing University,Nanjing 210044,China;Shanxi Provincial Meteorological Bureau,Taiyuan 030000,China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心/气候与环境变化国际合作联合实验室,南京210044 [2]晋中市气象局,山西晋中030600 [3]忻州市气象局,山西忻州034000 [4]南京大学大气科学学院,南京210044 [5]山西省气象局,太原030000

出　　处：《气象与环境科学》2019年第2期1-9,共9页Meteorological and Environmental Sciences

基　　金：国家重点基础研究发展规划项目(2012CB9552003);国家自然科学基金项目(41275095)

摘　　要：利用MODIS下垫面资料和NCEP-FNL再分析资料,采用四层嵌套,通过WRF(Weather Research and Forecasting Modeling System)模式,模拟研究了城市化对南京气候的影响。结果表明:城市土地利用类型的改变使下垫面热力、动力属性发生改变,影响了地表与大气之间的动量和热量交换,进而对局地气候特征产生影响。城市化后南京城市热岛效应明显增强,1月和7月2m气温有明显增加的趋势,边界层高度分别增加了约60m和180m 。土地利用类型改变使地表粗糙度增加,1月和7月地面风速分别减小了1.1m·s^-1和0.7m·s^-1 ,并且地面辐合得到加强。城市化使城市地区的中雨和大雨发生概率增加而小雨发生概率减少,中雨和大雨天数最大分别增加约8天和4天。The influence of urbanization on the climate of Nanjing was studied by numerical simulation of WRF model,while using MODIS land surface data and NCEP-FNL reanalysis data,adopting four layers of nesting.The results showed that the change of land use type in urban caused the change of thermodynamic and dynamic properties in urban underlying surface,which affected the momentum and heat exchange between the surface and the atmosphere,and the local climatic characteristics in advance.The heat island effect was enhanced obviously,the 2m temperature significantly increased in January and July, and the height of the boundary layer increased by about 60 and 180 m.The surface roughness increased with the change of land use type,the ground wind speed decreased by 1.1 m·s^-1 and 0.7 m·s^-1 in January and July,respectively,and the ground convergence was strengthened.Urbanization increases the probability of moderate and heavy rain in urban areas while decreases the probability of light rain. The number of moderate and heavy rain days increases by up to 8 and 4 days respectively.

关 键 词：城市化 南京 气候 WRF 

分 类 号：P461.8[天文地球—大气科学及气象学] P467