An approach to the solution of polar singularity problem in grid-point atmospheric model

doi:10.7523/j.issn.2095-6134.2010.1.016

›› 2010, Vol. 27 ›› Issue (1): 127-132.DOI: 10.7523/j.issn.2095-6134.2010.1.016

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An approach to the solution of polar singularity problem in grid-point atmospheric model

SHI Xiang-Jun, WANG Bin, JI Zhong-Zhen

LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Received:2009-03-06 Revised:2009-09-09 Online:2010-01-15

Abstract

Abstract:

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

CLC Number:

P435

SHI Xiang-Jun, WANG Bin, JI Zhong-Zhen. An approach to the solution of polar singularity problem in grid-point atmospheric model[J]. , 2010, 27(1): 127-132.

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An approach to the solution of polar singularity problem in grid-point atmospheric model

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