假谱诊断分析模式——(二)理想场与实例检验

颜宏;李素华;王可丽;陈玉春

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高原气象 ›› 1986, Vol. 5 ›› Issue (1) : 16-28.
论文

假谱诊断分析模式——(二)理想场与实例检验

  • 颜宏;李素华;王可丽;陈玉春
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A PSEUDO-SPECTRAL DIAGNOSTIC MODEL part Ⅱ: Verification Tests with Ideal Flow and Real Odserved Fields

  • Yan Hong;Li Suhua;Wang Keli;Chen Yuchun
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摘要

本文利用理想解析流场及FGGEⅢb实况资料, 对假谱诊断模式进行了检验, 並与二价和四阶差分法的结果进行了对比。结果表明, 对于次天气尺度的诊断分析而言, 在给定格距条件下, 假谱分析方法最好, 四阶精度差分法次之, 而通常用的中央差效果较差。因此假谱诊断模式对短波的诊断具有较高的精度, 更适合于次天气尺度系统的诊断分析。

Abstract

The pseudo-spectral diagnostic model(see details in the Part I) is verified with an idealized analysis flow field as well as the observed data from FGGE Ⅱ data set(ECMRWF) with comparison to the second order and forth order finite difference schemes.The results show that for the meso-scale diagnostics with a given horizontal resolution, the pseudo-spectral method seems to be the best, the forth order finite difference method is better than the second order finite difference scheme which is widely being used in weather analysis. Therefore the pseudo-spectral diagnostic model, with a higher accuracy, is more suitable for the diagnostics of meso-scale system.

关键词

诊断分析 / 次天气尺度系统 / 实况资料 / 涡度 / 散度场 / 辐合区 / 实例检验 / 差分法 / 假谱方法

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颜宏;李素华;王可丽;陈玉春. 假谱诊断分析模式——(二)理想场与实例检验. 高原气象. 1986, 5(1): 16-28
颜宏;李素华;王可丽;陈玉春. A PSEUDO-SPECTRAL DIAGNOSTIC MODEL part Ⅱ: Verification Tests with Ideal Flow and Real Odserved Fields. Plateau Meteorology. 1986, 5(1): 16-28

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