An approach to the solution of polar singularity problem in grid-point atmospheric model
解决格点大气环流模式极点问题的一种方法

There are two singularities in atmospheric governing equations under spherical coordinate system,and hence,velocity at the north and south poles can not be defined and predicted directly by grid-point atmospheric model. To solve this problem,a simple approach is presented,and an explicit square conservation scheme in A-grid for shallow water model is chosen as an example. The new approach defines pole velocity and sets up a difference equation. The new model can predict pole velocity directly,and the numeri...