연구성과
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논문부터 기술과 소프트웨어까지, 더 정확한 예측을 위한 지식과
경험을 나눕니다.
[논문] 이중 푸리에 급수 분광법 역학코어의 정확도와 계산 효율성 평가
- 작성자
- 마스터관리자
- 작성일
- 조회수
- 82
Abstract:
The double Fourier series (DFS) spectral dynamical core is evaluated for the two idealized test cases in comparison with the spherical harmonics (SPH) spectral dynamical core. A new approach in calculating the meridional expansion coefficients of DFS, which was recently developed to alleviate a computational error but only applied to the 2D spherical shallow water equation, is also tested. In the 3D deformational tracer transport test, the difference is not conspicuous between SPH and DFS simulations, with a slight outperformance of the new DFS approach in terms of undershooting problem. In the baroclinic wave development test, the DFS-simulated wave pattern is quantitatively similar to the SPH-simulated one at high resolutions, but with a substantially lower computational cost. The new DFS approach does not offer a salient advantage compared to the original DFS while computation cost slightly increases. This result suggests that the current DFS spectral method can be a practical and alternative dynamical core for high-resolution global modeling.
Keywords:
High-Resolution Modeling; Dynamical Core; Idealized Test; Double Fourier Series; Spectral Model
Citation:
Kim, B.-S., Koo, M.-S., & Son, S.-W. (2023). Evaluation of Accuracy and Efficiency of Double Fourier Series (DFS) Spectral Dynamical Core. Atmosphere, 33(4), 387–398.
The double Fourier series (DFS) spectral dynamical core is evaluated for the two idealized test cases in comparison with the spherical harmonics (SPH) spectral dynamical core. A new approach in calculating the meridional expansion coefficients of DFS, which was recently developed to alleviate a computational error but only applied to the 2D spherical shallow water equation, is also tested. In the 3D deformational tracer transport test, the difference is not conspicuous between SPH and DFS simulations, with a slight outperformance of the new DFS approach in terms of undershooting problem. In the baroclinic wave development test, the DFS-simulated wave pattern is quantitatively similar to the SPH-simulated one at high resolutions, but with a substantially lower computational cost. The new DFS approach does not offer a salient advantage compared to the original DFS while computation cost slightly increases. This result suggests that the current DFS spectral method can be a practical and alternative dynamical core for high-resolution global modeling.
Keywords:
High-Resolution Modeling; Dynamical Core; Idealized Test; Double Fourier Series; Spectral Model
Citation:
Kim, B.-S., Koo, M.-S., & Son, S.-W. (2023). Evaluation of Accuracy and Efficiency of Double Fourier Series (DFS) Spectral Dynamical Core. Atmosphere, 33(4), 387–398.