二种正规模初值化的比较试验

A TEST OF COMPARED TWO NORMAL MODE INITIALIZATION SCHEMES

本文用麦申豪尔(Machenhauer 1977)的非线性正规模初值化(简称NMI)和动力正规模初值化(简称DNI)案进行比较试验。试验分别在一层谱模式、多层谱模式以及四维同化系统中进行试验。试验的结果表明:在一层谱模式上NMI比DNI稍好,而在多层谱模式上则DNI比NMI稍好。在四维同化系统中对分析的拟合结果进行比较,总的来看DNI稍好于NMI。

The test shows that in a shallow water model the nonlinear normal mode initialization (NMI) is better than dynamic normal mode initialization (DNI). But DNI is better than NMI in multi-level model.In the assimilation system DNI is better than NMI for analysis fitting.