THE LIMITED AREA ANALYSIS AND FORECAST SYSTEM AND ITS OPERATIONAL APPLICATION

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  • The limited area analysis and forecast system(LAFS) was developed and has been put into operational use at National Meteorological Center since January 1991.This system can be regarded as a branch system attached to the global assimilation and medium-range forecast system which is based on a spectral model T42L9.The main advancements as an upgrade operational system are as follows:the use of a regional fine mesh optimum interpolation(OI) analysis scheme:the realization of the nonlinear normal mode initialization for the regional model:the development of a 15L-spherical grid primitive equation model(with real topography and enstrophy conservation) and its nesting forecast with the spectral model T42L9.
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