物理参数化和资料初始化对中国东南部暴雨模拟的影响
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作者单位
徐建军,万齐林  
基金项目:“十一五”国家科技支撑计划重点项目(2006BAC02B);公益性行业(气象)科研专项(GYHY(QX)200706014)
中文摘要:利用美国国家大气研究中心(National Center for Atmospheric Research,NCAR)中尺度模式(WRF ARW)以及美国国家海洋和大气管理局(NOAA)三维变分同化系统GSI(Gridpoint Statistical Interpolation),对2005年6月20—21日发生在广东省中部的一场致洪暴雨进行了模拟。与雨量计观测的和卫星反演的降水混合资料相比,模式能够成功地模拟出降水的位置和强度。但数值模拟的效果很大程度上取决于3个条件:模式分辨率;物理过程方案;初始条件。在此次暴雨的模拟中,采用Eta Ferrier微物理方案、内层区域4 km细分辨率与外层区域12 km粗分辨率组成双层嵌套网格和卫星辐射资料同化的初始化方案是非常合适的。
中文关键词:WRF模式  资料同化  暴雨模拟
 
Influence of physical parameterizations and initialization on simulation of rainstorm over Southeast China
Abstract:A rain storm associated with a flash flood event is simulated by the Advanced Weather Research and Forecasting(WRF ARW) model of National Center for Atmospheric Research(NCAR) and Gridpoint Statistical Interpolation(GSI) data assimilation system of U.S.NOAA.The event is based on a flash flood that occurred in the central Guangdong Province of southeast China during 20—21 June 2005.Comparing to a mixed rain gauge and satellite retrieved precipitation data,the model shows a capability to reproduce the intensity and location of rainfall.However,the simulation depends to a large extent on three conditions:model resolution,physical processes schemes and initial condition.In this case,the Eta Ferrier microphysics scheme and the initialization with satellite radiance data assimilation with fine 4 km resolution nested grid and coarse 12 km resolution outer grid are the appropriate options.
keywords:WRF model  data
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