强对流天气的数值模拟试验

将 RAMS中尺度模式从 VAX/VMX平台移植到 Win95/NT平台 ,并结合中尺度天气系统的特点 ,自行研制了与该模式相配套的前后处理技术 ,从而在 586高档微机上建立了强对流天气中β尺度数值模拟系统。并利用本系统就均匀初始场、加密观测资料和常规报文资料作为非均匀初始场分别进行了模拟试验。结果表明 :移植是成功的 ,系统能够模拟出对流系统的发生、发展和演变及其宏、微观结构 ;强对流系统出现时往往对应上升和下沉气流都比较强、变化剧烈 ;系统提供的最大垂直速度、总动能和各种水物质极值随时间的演变都是很好的对流发生、发展的征兆因子

Numerical Simulation Test of Severe Convective System

A meso scale model RAMS which was jointly developed by CSU has been transplanted from the platform of VAX/VMX to that of Win95/NT in this paper. The front and back job matched to the model has been developed by the authors with the consideration of meso scale weather system features, thus the numerical simulation system for meso scale severe convective weather has been set up on type 586 computer. The system has been used to perform numerical test according to homogeneous initial fields and inhomogeneous initial fields, which was showed by intensive and conventional observation data. The results show that the transplant is success, which can simulate the generation, development and evolution of the convective system and its macroscopic and micro structure. When the severe convective system appears, the updraft and downdraft are strong and their changes are remarkab. The peak value of maximum vertical velocity, total kinetic energy and all kinds of water substance which are accompanied by the development of time, are the omens of generation and development of convection.