安徽一次暴雨过程的数值模拟与诊断分析
Numerical Simulation and Diagnostic Analysis of a Rainstorm Process in Anhui Province
张添姿 1潘晓滨 1臧增亮 1尹伊2
作者信息
- 1. 解放军理工大学气象海洋学院，江苏南京211101
- 2. 中国人民解放军93956部队，甘肃张掖734015
- 折叠
摘要
利用1°×1°的GFS分析场数据和中尺度数值模式WRF，对2014年5月31日～6月1日发生在安徽阜阳的一次暴雨天气过程进行数值模拟和诊断分析。结果表明，WRF模式能够近似地模拟此次降雨过程；高低空急流耦合是此次暴雨过程发生和维持的主要影响机制；暴雨中心上空垂直螺旋度呈现高层负、低层正的分布，这也是触发暴雨的重要机制；降水开始前，大气呈现上湿下干的湿度分布，这种大气层结很不稳定，易导致降雨的发生。
Abstract
Based on the 1°×1°analysis field data from GFS (Global Forecasting System),with a mesoscale numerical model WRF (Weather Research and Forecasting model) ,a torrential rain occurred in Anhui Province from 31 May to 1 June ,2014 was simulated and diagnostically ana-lyzed.The results showed that WRF model has a good forecasting ability in a rainfall process;the coupling of the low-level and upper-level jet was the main dynamical mechanism of the out-breaking of this torrential rain process;the vertical helicity at the upper levels was negative while at the lower levels,it was positive; the atmosphere humidity at the upper levels was damp while at the lower levels it was dry before precipitation.
关键词
暴雨/数值模拟/环流形势/物理量Key words
Heavy rainfall/Numerical simulation/Circulation situation/Physical quantity引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据