HUBEX区域资料同化系统

介绍HUBEX区域资料同化系统。这个系统采用6 h周期的间歇资料同化方法, 利用全球粗网格分析场资料, 形成冷启动的初估场和同化模式的边界条件。系统还包括资料质量控制、σ面最优插值客观分析、张弛逼近 (Nudging) 初值化、中尺度同化模式预报和后处理等部分, 对来自全球通讯系统、HUBEX加密观测的资料和国家卫星气象中心的导风资料进行同化。最后, 用1998年6月24~28日长江流域的暴雨过程对这个资料同化系统进行测试。

Regional Data Assimilation System of Huaihe Basin Experiment (HUBEX)

The Regional Data Assimilation System (RDAS) of Huaihe Basin Experiment (HUBEX) is presented. The RDAS is an intermittent assimilation system in which an assimilation cycle includes four analyses in a daily period. Both the first guess fields for the cold starting of the system and the boundary conditions for the assimilation model are supplied by products of the global model system. The RDAS consists of quality control, σ-surface optimum interpolation objective analysis, nudging initialization, mesoscale assimilation model forecast and post-processing. The observational data from the Global Telecommunication System (GTS), HUBEX intensive observation period (IOP) and National Satellite Meteorological Center are assimilated. Finally, a heavy rain process in June 24—28, 1998 is tested using the RDAS.