高分辨有限区数值预报模式的省时显式积分

Economical Explicit Integration of High Resolution Regional Numerical Prediction Models

本文提出利用省时显式方案积分两个高分辨有限区数值预报模式。其结果表明，这一积分方案可以使模式的计算效率大大提高，而由时间积分方案的变化所造成的预报差异比模式空间离散化方案的不同所造成的预报差异要小。同时还讨论了将省时显式方案用于有限区模式的边界处理问题，提出了一个与蛙跃格式等价的边界处理方案。

In this paper, an economical explicit scheme is used to integrate two high resolution numerial prediction models. It is shown that this new scheme for time integration effectively saves the computer resources without notable changes in the forecast fields. The problems of lateral boundary treatment needed When this scheme is applied to the limited area model are also discussed. A new boundary filter equivalent to that of leap frog scheme is proposed.