Dynamical core of an atmospheric general circulation model on a Yin-Yang grid

Yuya Baba*, Keiko Takahashi, Takeshi Sugimura, Koji Goto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


The three-dimensional dynamical core of an atmospheric general circulation model employing Yin-Yang grid is developed and examined. Benchmark test cases based on the shallow-water model configuration are first performed to examine the validity of two-dimensional calculations. The experiments show that the model simulates reasonable flow fields with second-order accuracy. The model validation is then extended to threedimensional features where the capability of the dynamical core on the Yin-Yang grid has not been tested before: the global mountain gravity wave, long-term integration, and life cycle experiments. The simulated flow fields are in good agreement with the results of original experiments in all three experiments. The sensitivity of the model flow field to the overset region is also tested. The experiments reveal that the presence of the overset region does not significantly affect the dynamics on both long and short time scales, if the number of overset grids is fixed to three and the high-order interpolation method is applied for data interpolation between the Yin-Yang grids.

Original languageEnglish
Pages (from-to)3988-4005
Number of pages18
JournalMonthly Weather Review
Issue number10
Publication statusPublished - 2010 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Atmospheric Science


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