广西对流尺度数值天气预报模式系统建设与效益评估

Construction and benefit evaluation of convective scale numerical weather prediction model system in Guangxi

广西现运行的对流尺度数值天气预报模式系统基于华南短临预报模式CMA-GD(R1)经本地化开发建立。介绍了该模式系统所采用的新技术:包括三维静力参考大气、迭代式SISL方案、多进程并行I/O、并行Nudging同化等,分析了业务运行情况及模式预报初步检验结果。应用实践证明,模式系统可以高效稳定运行,提供了逐12min更新、预报时效为6h的模式预报产品,为强天气短时临近预报提供参考。

The convective-scale numerical weather prediction model system operating in Guangxi is developed and established locally based on the short-term and imminent forecasting model CMA-GD(R1)in South China.The new technologies used in the model system are introduced,including three-dimensional static reference atmosphere,iterative SISL scheme,multi process parallel I/O,and parallel Nudging assimilation.The operation situation and the preliminary test results of model prediction are analyzed.The application practice proves that the model system can run efficiently and stably,and provides a model forecast product that updates every 12 minutes and the forecast time limit is 6h,which provides a reference for the short-term approaching forecast of strong weather.