Title: 陰陽格子の開発
Title: The "Yin-Yang Grid": A Chimera Grid for the Spherical Geometry

Author: 陰山 聡

Key words: Yin-Yang grid, overset grid, Chimera grid

Abstract: 
An overset grid or a Chimera grid is proposed for the spherical 
geometry. It is named "Yin-Yang Grid" since it reminds us the 
Chinese philosophical symbol (or its three-dimensional version). The 
Yin-Yang grid is composed of two component grids. They are identical 
in the shape and the coordinates. The component grid is just the low 
latitude region of the usual spherical latitude-longitude grid. The 
grid spacing of the Yin-Yang grid is nearly uniform and it has no 
coordinate singularity. The Yin-Yang grid is applied to 
geoscientific three-dimensional simulations including geodynamo, 
mantle convection, atmosphere and ocean simulations.