2003年江淮连续梅雨暴雨过程的中尺度数值试验

为了分析天气研究及预报WRF(weather research and forecasting)模式对我国天气现象的适用性,利用WRF模式对2003年淮河汛期的3次梅雨锋暴雨过程进行了一组数值模拟试验,对3次天气过程模拟试验采用相同的参数设置,模拟区域根据实况降水落区作了相应设置.模拟结果分析表明,WRF模式能有效模拟我国梅雨锋暴雨的环流背景和天气形势,较好地反映影响暴雨的中尺度系统的发生和发展等特征,还可以较好地模拟出雨带的范围、位置和走向,对降水中心的模拟基本可用.

Analysis and mesoscale numerical simulation of continuous Jianghuai Meiyu front rainstorm in 2003

Numerical simulation tests of three representative Meiyu front rainstorm processes of the Huai-he flood reason in July 2003 were conducted with WRF(weather research and forecasting) model for the intention of investigating the applicability of WRF model to research and forecast our country's rainstorm.Identical basic parameters were adopted in simulating the three weather processes while different configurations of the three simulating domains were employed to suit the corresponding observed rainbands.Analysis of the simulation results indicates that WRF can effectively simulate the circulation background and synoptic situation of Meiyu rainstorm of our country.Moreover,characters of genesis and evolution of mesoscale system impacting rainstorm are also reflected exactly.WRF model well simulates the range,location and tendency of the rain belt,and simulation effect of the precipitation centers is preferable.