Journal of University of Chinese Academy of Sciences >
An approach to the solution of polar singularity problem in grid-point atmospheric model
Received date: 2009-03-06
Revised date: 2009-09-09
Online published: 2010-01-15
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 numerical experiment shows that the results are reasonable.
Key words： atmospheric mode; pole; singularity
SHI Xiang-Jun , WANG Bin , JI Zhong-Zhen . An approach to the solution of polar singularity problem in grid-point atmospheric model[J]. Journal of University of Chinese Academy of Sciences, 2010 , 27(1) : 127 -132 . DOI: 10.7523/j.issn.2095-6134.2010.1.016
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