山区风场的WRF/CALMET模式模拟  

WRF/CALMET-Based Wind Field Simulation of Mountain Regions

作　　者：王文勇[1] 陈楠[1] 

机构地区：[1]西南交通大学环境科学与工程学院,四川成都610031

出　　处：《西南交通大学学报》2010年第6期990-996,共7页Journal of Southwest Jiaotong University

基　　金：四川省软科学计划资助项目(2008ZR0163)

摘　　要：为更精确地模拟地形热力引起的山区局地风场,采用美国国家大气研究中心(NCAR)的中尺度天气模式WRF对某山谷工业园区的大气流场进行了模拟,然后采用诊断风场模块CALMET对模拟结果进行小尺度(格距0.1 km)修正.模拟中,WRF模式采用三重嵌套网格方案,最内层网格格距为1.0 km.结果表明:WRF模式的模拟结果与实测值相差甚大,而WRF/CALMET耦合模式的模拟结果与实测值接近,因此采用WRF/CALMET耦合模式模拟山区大气流场比较符合实际.To more accurately simulate the local wind field caused by the terrain thermal of mountains,the atmospheric flow field of a valley industrial park was simulated by using the mesoscale weather model WRF（weather research and forecasting model） proposed by the United States NCAR（National Center for Atmospheric Research）,and the simulated result was amended in a small scale（with a grid distance of 0.1 km） by using the diagnostic wind field model CALMET.In the simulation,a triple-nested grid program is used in the WRF model,and the distance between two grids in the inner layer of the network is 1.0 km.The research result shows that there is a great difference between WRF-based simulated results and measured values,while WRF/CALMET-based simulated results are close to the measured values.The conclusion is that the WRF/CALMET coupled model should be used to simulate the atmospheric flow field of mountain regions.

关 键 词：天气预报模式 中尺度大气扩散模式 大气流场 

分 类 号：P425[天文地球—大气科学及气象学]