变网格一体化模式的研究进展

Research Progress in the Unified NWP Model with Variable Resolution

作者介绍了近年来在数值天气预报领域的一个新动向──变网格一体化模式的进展。这种模式可以替代目前业务数值天气预报的有限区模式和全球谱模式，降低业务数值天气预报的计算成本。网格距离的可变性，以及采用半隐式－半拉格朗日式时间差分方案是该模式的主要特点。法国的变网格一体化模式自１９９２年已投入业务使用，其可行性已得到了预报检验的初步证实。

brief introduction to a new advance in the NWP field: unified global NWP models with variable resolution is given. The principal purpose is to decrease the calculation cost of the NWP by unifying the limited area NWP model and the global spectral NWP model as an only operational one. A horizontal resolution, and a semi-implicit and semi-Lagrangian integration scheme were used in this unified NWP model. The French unified model went into operation in 1992. The results were very encouraging !