Design of a Non-Hydrostatic Model Suitable for Deep Moist Slantwise Convection and Numerical Study of the Conditional Symmetric Instability
二维非静力平衡深厚湿倾斜对流数值模式设计与条件性对称不稳定数值试验

A two-dimensional non-hydrostatic model is designed to suit with deep moist slantwise convection. The most sophisticated parts of model include: (1) the use of non-hydrostatic model, (2) the use of consistency vertical and horizontal resolutions, (3) the use of variable diffusion coefficients. From the conditional symmetric instability (CSI) numerical experiment we draw main conclusions as follows: A typical slantwise roll of CSI appears in the meridional plane. A strong slantwise updraft layer appears accompanying downdraft layers above and below. A slantwise cloud is formed and sustained along the updraft region of CSI. Mixed-instability is formed because of the development of CSI.