CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2004, Vol. 21 ›› Issue (2): 149-155.

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Numerical Properties of 3D Grids in a Nonhydrostatic Model

LIU Yu-di1,2   

  1. 1. State Key Laboratory Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, China Academy Sciences, Beijing 100029, China;
    2. Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China
  • Received:2002-10-09 Revised:2003-04-12 Online:2004-03-25 Published:2004-03-25

Abstract: In the framework of linear baroclinic nonhydrostatic anelastic equations,calculation is undertaken for dispersions of inertia gravitational waves in different kinds of 3D(three-dimensional) grids from the perspective of frequency and group velocity, indicating that such 3D structures as EL/CP, C/CP and Z/LZ are superior to others in the computational dispersion properties, thereby providing a guidance to the selection of 3D grids applicable to atmospheric primitive equation nonhydrostatic models.

Key words: nonhydrostatic model, 3D grids, frequency, group velocity

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