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An implementation of single-precision fast spherical harmonic transform in Yin–He global spectral model
Quarterly Journal of the Royal Meteorological Society ( IF 3.0 ) Pub Date : 2021-03-23 , DOI: 10.1002/qj.4026
Fukang Yin 1 , Junqiang Song 1 , Jianping Wu 1 , Weimin Zhang 1
Affiliation  

In this article, we describe an implementation of single-precision fast spherical harmonic transform (SHT) in the Yin–He global spectral model (YHGSM). The potential of single-precision arithmetic is explored for accelerating fast SHT. In particular, we assess the impact of using single-precision fast SHT on the meteorological skill of YHGSM. Compared to double-precision SHT, single-precision fast SHT against is accelerated by about 59.83%, whereas the run-time reduction achieved 25.28% in model integration for TL2047L137. The simulation results indicate that single-precision fast SHT can improve computational efficiency without a noticeable impact on the forecast skill.

中文翻译:

阴河全局谱模型中单精度快速球谐变换的实现

在本文中,我们描述了在阴河全局谱模型 (YHGSM) 中单精度快速球谐变换 (SHT) 的实现。探索了单精度算术在加速快速 SHT 方面的潜力。特别是,我们评估了使用单精度快速 SHT 对 YHGSM 气象技能的影响。与双精度 SHT 相比,单精度快速 SHT 加速了约 59.83%,而 T L 2047L137 的模型集成运行时间减少了 25.28% 。仿真结果表明,单精度快速 SHT 可以提高计算效率,而对预测技能没有明显影响。
更新日期:2021-03-23
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