大气科学2011，Vol.35Issue(6)：1046-1056,11.
0713号“韦帕”台风暴雨的中尺度数值研究和非对称性结构分析
Mesoscale Numerical Study of the Rainstorm and Asymmetric Structure of 0713 Typhoon Wipha
摘要
Abstract
WRF (Advanced Weather Research and Forecasting modeling system) was used to simulate the localheavy rainstorm process caused by super typhoon Wipha over the eastern coast of Zhejiang Province from 17 to 19 September 2007. The analysis of the simulation result combined with Doppler radar data, TBB (Temperature of Black Body) data, and NCEP (National Centers for Environmental Prediction) reanalysis data shows that the rainstorm was due to the intrusion of north cold - dry current from the upper-level trough into the typhoon circulation. The warm-moist peripheral southeastern jet from typhoon Wipha brought rich moisture and heat, and the north cold - dry current provided kinetic condition and instability energy for precipitation. The distribution of rainfall and circulation of typhoon Wipha showed clear asymmetric structure during the landing period. The rainfall and convection activity mainly occurred in the west quadrant of typhoon. The east part of typhoon circulation was warm and moist while the west part was cold and dry. The energy front contributed by the convergence of cold and warm air in the coast area of Zhejiang Province was the most active convective region, also the main precipitation zone. There were several small scale convective cloud cells lining from north to south along the energy front in the low troposphere, together forming a mesoscale spiral rainband. As the typhoon moved northwestward, the north cold - dry current further intruded into the warm - moist circulations. There were new-born convective cells at the down edge of the rainband The strong vertical shear of wind along the energy front offered advantageous environment to the development and maintenance of the convective cells. The cold - dry current invaded into low level and imbedded into the bottom of the warm- moist circulations along the energy front, which, together with the beneficial topography, lifted the warm - moist air up forcefully and triggered convection weather.关键词
中尺度数值模拟/对流云团/冷空气/暖湿气流/能量锋/不对称性Key words
mesoscale numerical simulation, convective cells, cold-dry current, warm-moist air, energy front,asymmetric structure分类
天文与地球科学引用本文复制引用
周玲丽,翟国庆,王东海,王元..0713号“韦帕”台风暴雨的中尺度数值研究和非对称性结构分析[J].大气科学,2011,35(6):1046-1056,11.基金项目
国家自然科学基金资助项目40975021、40830958,中国气象科学研究院灾害天气国家重点实验室重点项目2008LASW-A03,国家公益性行业科研专项GYHY201006007 （）
