谱模式中半隐式时间积分格式稳定性的试验和分析

Analysis and Test of Stability of Semi-implicit Scheme in Spectral Model

本文研究了具有参考大气的谱模式半隐式时间差分格式的计算稳定性问题.通过试验与分析,找到了影响这种半隐式格式计算稳定性的关键因子.另外本文还进一步试验了第一作者过去提出的修改的半隐式时间差分格式,这种格式采用了修改半隐式项而不改变重力波性状的做法.取得了稳定的计算结果.

Stability of semi-implicit time scheme in spectral model was studied. In this paper, the substantial factor to the time semi-implicit scheme has been found. Furthermore, modified semi-implicit time scheme proposed was further tested with stable computation results.